Intermittent Engine Knock At Idle

Now, let's look at the most common causes of knock. purchased used 3 months ago. Harley Davidson Dyna Glide: Engine Noise Diagnostic Guide. Sometimes the engine will settle completely if I let it idle (perhaps 1 minute). I have this sound coming from my engine at idle that is driving me nuts as it's causing me to keep thinking something is wrong with my SH 2. Hi guys,So i swapped my old points distrubtor today for an electronic 280z one (I am very impressed) and i thought it might aleviate this problem im having with an intermittent popping sound when the car is idling, but its still there. ) only on warm start-up. This noise is loudest when the engine is under heavy load. But I have two other noises my engine is making, one of them being the intermittent clacking noise that happens when the engine is warm. Setting IAC (Idle air control) valve I saw this video , and wonder about his words of "wisdom. You may notice a general lack of power. It was running ok and suddenly started running slower and started making the knocking noise. If I start the car about an hour after previously driving it, the knocking appears. Do I have. 4L 3V engine c. Have any of you experienced this? i feel if it's intermittent it's coming from a intermittent component, not the engine it's self. The 2009 Toyota Tacoma has 4 problems reported for ticking/chattering noise at idle and acceleration. 2018 Tacoma engine noise!! Annoying If I'm sitting at idle and hit the gas it kinda stalls at first and sounds like air coming out like the timing might be off a. ) only on warm start-up. LOUD Intermittent engine clicking when it was at idle and clicking, it was idling a bit rough. Intermittent low knocking from engine bay, heard when hot and at idle - s70 NA Manual Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine. Problem: When the vehicle is left for a period of time, it is very hard to start. When I step on the gas it seems to go away immediately. Diagnostic Trouble Codes. How can I be sure that it is in fact a rod. The force required can damage the threads on the worm drive. The PCM regulates engine intake air at idle with an electronically controlled device called an idle air control (IAC) valve. As the rpm goes up, the knock becomes more frequent, and usually louder. Cold idle engine chatter T1N Talk. Started it back up and there was no knocking at idle. I have a 2004 EX with 103km and within the last month I have noticed that when I am at a stop light and the engine is on idle,there is sometimes a surge in rpm and the van wants to move off,any ideashave not replaced the timing belt as yet but will soon. P0325 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor) P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor) P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor). As it states. I was out towing with the subruban last night, everything went great. the noise still comes and goes. If the valve is working properly, you should hear a hissing noise from the valve with the engine running at idle. I also do mostly city driving. Also when you hold steady throttle, say at 2800 rpm you hear it, but if you take your foot off gas it stops, or if you accelerate it stops. Basically, engine knock (also known as pinging, detonation and spark knock) occurs when the air/fuel mixture inside a cylinder is incorrect, which makes the fuel burn. Again, I am answering this on the assumption your "knock" is engine mechanical. When giving it gas it immediately goes away. purchased used 3 months ago. I continued on with my update leaving the car at idle and then the knock suddenly went away and disappeared for the remainder of the time I was in the car. The engine knock may be caused by an interaction between carbon that has formed on the piston, the piston motion, and the cylinder wall. hesitation on acceleration, intermittent loss of power, engine misses at idle etc - pointing to a vacuum leak at or near intake manifold. This sounds more like a mechanical engine knock than a fuel/spark knock. Excessive crankshaft end play is indicated by an intermittent rap or knock sharper than a worn main bearing. All engine indications appear to be normal and at any power setting above idle, I don't hear it anymore. I've read many threads with these symptoms, checked the service manual, and so on, but can't really afford to keep replacing things until the problem is fixed, so I want to ask if anyone knows what could cause these symptoms without triggering the check engine. 4) is warm/hot. 5 Causes of Engine Ticking Noise (At Idle, Acceleration, & After Oil Change) After that event, I began to notice intermittent low engine power, whereby I will. 2004-2013 f-150, f-250, f-350, expedition, mark lt, navigator. One of the most common problems is likely a rough running or poorly idling engine. I noticed the noise just after an oil change. then it comes worse stops and knocks again. I've read many threads with these symptoms, checked the service manual, and so on, but can't really afford to keep replacing things until the problem is fixed, so I want to ask if anyone knows what could cause these symptoms without triggering the check engine. Engine intermittent rattling and smoke - diagnoses please! Fine all last year apart from very rough running (vibration) at low RPM; laid up for winter, and on basis of same advice from several different sources, decided to have injectors recon'd. Got my 2015 fiat 500 sport used (auto, non turbo, 45,000km/28,000miles on it). 0L engine may exhibit an intermittent metallic rattle or scratching type noise in the area at the front of the left hand (driver side) cylinder head at idle with the engine at operating temperature. It did it at idle mostly, at highway speeds it was ok. Not sure if thats just because of the louder engine noise or that it actually goes away. A202B003 DAEWOO T-154 BL2,3 Page 55 7. That's what so strange Wayne. This kind of engine stalling problem often means the engine is not getting enough fuel and/or too much air. Louder idle and intermittent idle RPM hiccups. There is no check engine light, and so no code when connected to code reader. When I pulled the head to replace a bad valve I cleaned out all the carbon, polished all the valves an seats. Basically, engine knock (also known as pinging, detonation and spark knock) occurs when the air/fuel mixture inside a cylinder is incorrect, which makes the fuel burn. These are the things that make you hate mechanics Try checking the brake booster. The longer you wait to fix this, the more it will cost. I've been experiencing intermittent engine knocking sometimes during idle and sometimes when with power or when anti stall is kicking in. Below are the four most common. Engine knock only when driving, not while idling or revving engine while in neutral. Engine Knocking Its intermittent and doesnt start on initial start up. Ford issues technical service bulletin to dealers about how to fix rough idle and rattle noise. C5 Computer Diagnostic Codes The ability to view engine operating data such as oil pressure and coolant temperature, in digital form on the instrument panel has been a feature of Corvettes since 1984. Difficult takeoffs. ACTION Follow the Service Procedure steps to correct the condition. My car's been suffering from rough idle for a good couple of months now (Its on 40k) however it seemed a bit more prominent this morning so i. Now my question is if I do put the weisco in my engine. Again, the noise is more noticeable on acceleration because the engine spins faster. Engine knocking noise - suggestions please Cherokee Car Forums Automotive Forums. When engine was cool, the rotor was moving in all the thick grease so no problem. It seems to be more problematic in colder temperatures. High idles may be commanded by the ECM for certain battery charging electrical loads or diesel particulate filter (DPF) cleaning processes. I had a similar problem. Solution: Common symptons are the engine will turn for a number of seconds before firing and will then idle rough. Every once in a while the car starts to idle rough but then it returns to normal, sometimes while driving, even on highway, the car looses power, as if it ran out of gas but than, after a a couple of seconds, things return to normal. I have a 2011 Chevy Equinox that is also have the same engine problems (diesel-like start, rough idle, stalling, etc). Build tolerance stack-up from engine to engine contributes to perceived differences in noise intensity. So a few days ago my engine developed an Intermittent knock at idle after it's warm. It is pretty loud and my stepdad said I shouldn't ride it The tempo is the same as the engine. Car has a rough idle and intermittent vibration at highway speeds. What is pre-ignition or valve clatter?. Or some odd intermittent engine temp sensor issue???? one easy thing to try - do a battery disconnect reset. Q: During idling, the engine starts making clicking sounds. When I pulled the head to replace a bad valve I cleaned out all the carbon, polished all the valves an seats. It is not regular knocking sound like I'd expect a bad rod bearing to be making but more of a rattle. Took them 50000 kms to figure out that a gasket inside the timing chain cover fails causing intermittent low oil pressure resulting in knocking sound. Now, while idling/warming up the engine occasionally a tapping/rattling noise comes from the engine. 5-03 Revision of Flash Process for New Engine Control Module (ECM) from Cummins. When you step on the gas, the engine bogs down or takes a second to respond. E, Instrument clusters From stock or your faulty unit rebuilt with a LIFETIME WARRANTY. Loudest when the engine is under load or acceleration, crankshaft knock can be diagnosed by paying close attention to the specific type of knock: A regular, rumble-like knock is often from worn main bearings. Today it's started making a really loud noise from the engine, it sounds like a fan, the noise stopped and started a couple of times, the engine temperature never goes over 90. I mean loud! like somebody hitting the engine with a hammer. Always had a strange 'wobble' at idle, was told it was normal but I was not. Diesel engine compression readings average approximately between 275 psi to 400 psi, depending on the design and compression ratio. some days it never does it but then on they days it decides to you want to commit suicide because it is so annoying, especially on my. When I start is and let it idle, from a cold or warm engine, there is an intermittent rattling sound. Since the problem is intermittent, needless to say it’s driving me crazy! I did a search to discover other possible solutions. How do you "disconnect" the RPM Limiter, I thought it was part of the ignition circuit and the engine would not run without it. Problems regarding Chevy 5. 7 that has developed a rough idle with P1411 code. If you're questioning what is normal engine noise, I may have the answer. I mean loud! like somebody hitting the engine with a hammer. The issue 2. Seems like it is coming from the fuel injectors, since I listened via a metal rod touched to the fuel pipe. Intermittent engine knock with smoke at the same time under load at low speeds only. Subspace identification method is used to derive a proper state space model of engine around idle speed state. i thought the whole stinkin engine was gonna blow-LOUD knocking. With engine running idle, if you open the hood do you hear the steering pump running, like a small light buzz not too loud when you concentrate close to the pump or you just hear nothing at all except the engine itself. It can indicate overheating or that you are in too high a gear for the engine to cope with. 2 and at about 1500 miles I started hearing lifter ticking (1-2 secs. A "knock" is usually slack on the lower end at the crank, either from excessive play in the rod bearings or the main journals. It has a slight knocking sound at idle when warm. My 1980 seems to have a separate issue though, because the idle is bad (as of yesterday) even when the engine starts cold. I have a new Forte EX w/2. I originally thought this was a timing chain rattle. 4L 3V engine c. My 2000 corolla started to develop some more noise and vibrating in idle. I bought a 2015 Chevrolet Silverado 1500 Z71 Crew Cab 4X4 with the 5. Because of the intensity and intermittent noise, I doubt it is the tappet clearance. What is pre-ignition or valve clatter?. Could it be my timing chain? When should the timing chain and tensioner be changed? What about the VVT? Any insight would be greatly appreciated. Then replaced TPS for 60. 5K) bought it at 68K, changed the oil every 3. Strange thing is that it doesn't happen all the time. I drained some new oil and put in additives…this seems to have helped the knock but now when driving my truck is sounding like a pod racer in the Star Wars movie. It is not regular knocking sound like I'd expect a bad rod bearing to be making but more of a rattle. 2 V6 makes lifter noise that is normal for the engine. 20-P-048278, these vehicles may exhibit an intermittent knocking, ticking or knocking noise at idle and at engine speeds up to 1500 rpm. This noise may sound like a rod knock, but it is intermittent and it increases in intensity as the engine warms up to operating temperature. It has a vortec 5. A rod knock is very unique; at idle is a deep,booming,not-very loud, and from the top is usually hard to tell where it's coming from. Also back to the initial Q. Chrysler: Run the truck at 2000 rpm for two minutes, 3000 rpm for two minutes and then 3500 rpm for two minutes, until the engine reaches at least 140°F. 3 engine is known for: bad idle air control valves and throttle control switches. The mileage on the car is " 91860 ". Engine stalling is more likely to occur during cold weather or when starting a cold engine. I have a 2004 EX with 103km and within the last month I have noticed that when I am at a stop light and the engine is on idle,there is sometimes a surge in rpm and the van wants to move off,any ideashave not replaced the timing belt as yet but will soon. You hear the engine running after you turn off the ignition: Your engine is dieseling. 2000 and newer Dakotas and Durangos have a built-in system that can display check engine light (CEL) codes without the use of a scanner. JD 4020 Intermittent engine knock??!!! in. i have a 2000 DRZ400E (Aus model) with just over 9000km on the clock. This noise is loudest when the engine is under heavy load. This noise does not appear at any other time. It also doesn't seem like the noise is there on cold starts/when the engine is cold. Even after it sits for two hours. Is the loud noise an intermittent squeak? My 1998 ZX2 had a very annoying loud squeak that turned out to be due to the use of the wrong PCV valve. Who care? But a knock(of pistons) is caused by exploding gas and hard on the engine as is sound in the valves or bearings. Also when you hold steady throttle, say at 2800 rpm you hear it, but if you take your foot off gas it stops, or if you accelerate it stops. The odd thing is is that it sounds like it's coming from the bottom end ( I can hear it under the truck). 4L diesel engines may exhibit a random engine ticking / tapping noise that is most noticeable when engine coolant temperature is 185 degrees F (85 degrees C) or higher and from base idle to approximately 1500 RPM. Ticking sound at idle 01-29-2012 04:42 PM #1 I usually only hear it at idle, and as you can hear in the video, and it seems to go away after the engine reaches a certain speed. A rough idle/misfire usually starts out as being merely a nuisance, but if the causes are not identified and corrected, it may result in your engine not starting, or stopping altogether when you least expect it. Not sure if thats just because of the louder engine noise or that it actually goes away. I continued on with my update leaving the car at idle and then the knock suddenly went away and disappeared for the remainder of the time I was in the car. 6 L V8 gas engine and 7 sp transmission has an intermittent ticking sound coming from front of engine. If I start the car about an hour after previously driving it, the knocking appears. This idle is normal for the Raptor as the engine has been specifically tuned and designed for higher performance, over idle stability. I mean loud! like somebody hitting the engine with a hammer. Idle speed descriptions are included below. I have this sound coming from my engine at idle that is driving me nuts as it's causing me to keep thinking something is wrong with my SH 2. Would anybody know if this condition could be due to a bad knock-sensor? or any other sensor?. Its after driving afew miles or more. So i have a 96 chevy s10 with a little under 100k miles, and 2. At an idle it sounds like something is vibrating badly and resonating through the hull. If ignored, eventually something will. Note: If the engine has to be tilted, ensure the spark plug is facing upwards to help prevent oil from escaping the crankcase. 4L 3V engine c. Once you have ruled out all the basics, you can go back to what the Chevy 4. As its idleing however, the rpms fluctuate up and down erratically and then it'll smooth out for a few min and then it will begin again. when coming to a stop into neutral, the idle sometimes kicks up to 1500, 2000, or even 3000 rpm. It will knock (fairly loud, metallic, definitely inside the engine) and then stop knocking if you hold the rpm's steady. With engine running idle, if you open the hood do you hear the steering pump running, like a small light buzz not too loud when you concentrate close to the pump or you just hear nothing at all except the engine itself. Around 103,000 miles after the engine warms up it started knocking and sounding like a diesel truck near idle. The rattling goes for about 5 seconds, then disappears, then about 10 seconds later, does it. ? I'm headed to the mechanic tomorrow morning. Also, if I'm at idle at a stop light and the noise is there at that moment (remember, the noise isn't always there), once I get going it will go away but sometimes comes back even while still gaining speed or steady speed. hi, i have a VW 2. Select PIDs VCTDC, VCTDC2, and CHT may exhibit an intermittent rattle noise/rough idle when engine is at operating temperature. You mentioned that the noise was heard from the top area. Car only has a high idle for the first 30 or so minutes. It's most noticeable at low speeds, especially going up my driveway for example. The ticking starts up after two minutes of starting when at idle. Does anyone know what causes this engine noise? Is it something I should be worried about?This is a 2010 with 12k miles. Loudest when the engine is under load or acceleration, crankshaft knock can be diagnosed by paying close attention to the specific type of knock: A regular, rumble-like knock is often from worn main bearings. At an idle it sounds like something is vibrating badly and resonating through the hull. I just bought a 1997 Sea Ray Sundance 240 with a Mercruiser 5. I've had it a week and have noticed a ticking noise that sounds like it is coming from underneath the truck at the bottom of the engine. One of the more unusual causes of intermittent stalling we've heard about is a defective vehicle speed sensor. P0325 Knock Sensor 1 Circuit Malfunction (Bank 1 or Single Sensor) P0326 Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor) P0327 Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor). Hard start, clicking noise – Ford Truck; Intermittent no crank no start – Ford; Low idle or fluctuating idle Ford; No crank no start Ford; No crank no start Ford vehicles; No start; P0505, P0506, Idle fluctuation Ford; P2108 Ford 5. Sprayed around the noise with starter fluid and the engine perked up. The Yaris is bigger, safer, drier with a new 1. As belt speed increases, the belt noise may blend into one audible noise, but most likely diminish in intensity such that it won’t be detected. I have a 2000 durango w/5. 75k to 4k and the owner before me changed it every 4k. 2 V6 makes lifter noise that is normal for the engine. this concern of an engine tick. 1999 Dodge Ram Truck Technical Service Bulletins. Every time it cranked and started right up immediately after it died. Ford Mondeo 2001 1. If you have access to the lift, check the noises from below. The longer you wait to fix this, the more it will cost. 'Intermittent' I hate that word On idle I occassionally hear a rythmic knocking coming from the bottom of the engine bay. ) only on warm start-up. So a few days ago my engine developed an Intermittent knock at idle after it's warm. I hear nothing when the engine is cold. The Harley V-twin engine is characteristically noisy. Rate of ticking seems to keep time with engine but then accelerates even as engine stays idle. I would think if it was a rod it would knock all the time and increase along with the engine speed. Yesterday morning, ambient temp 15 C, aircon off. any ideas?. I am the third owner of this Forester(currently 87. Sometimes smoke at cold start, other times not. i have a 2000 DRZ400E (Aus model) with just over 9000km on the clock. It would be like a 1. Most importantly, no detonation, no intake backfires. Runs great but developed an intermittent tap/clack at idle and sometimes low rpm. 2004-2013 f-150, f-250, f-350, expedition, mark lt, navigator. I put 1,500 miles on it in the last week (including the drive from Texas to Virginia) with zero issues. Hard to describe, but it doesn't sound like a normal squeak or whining, but actual metal on metal grinding. * Intermittent shorts to ground in these circuits: injector solenoids, injector harnesses, fan clutch solenoids, fan clutch wiring, engine brake solenoids, engine brake wiring, OEM installed engine speed sensors, flywheel housing and associated wiring, datalink wiring, and fuel shutoff solenoid or wiring may cause intermittent Fault Code 343. At low idles it was getting a knocking noise at random intervals. One thing that is bothering me is the intermittent rough idle this N55 engine has but nothing visible on the RPM indicator. This kind of engine stalling problem often means the engine is not getting enough fuel and/or too much air. It's a 2005 4. Let the engine idle for 15-30 seconds and reevaluate whether the noise is still present or not. Have heard it more after warmed up, at idle, with the a/c on but I have heard it with the a/c off. I noticed a slight rattle/knocking noise right after I get off the highway when I'm idling at a stop. Welcome to our listing page for Generic Check Engine Light Codes. 2000 and newer Dakotas and Durangos have a built-in system that can display check engine light (CEL) codes without the use of a scanner. It's a heavy knock. In February 2013, Mercedes-Benz issued Service Bulletin LI03. My 2007 Titan with 109,000 miles on it developed the engine knocking noise at start-up, which lasted about 45 seconds, then quit. There was a knocking noise in my engine. Damage to the car’s carburetor and vacuum hoses can cause the engine to misfire, resulting in a rough idle. The bulb check will come on. I hear slight ticks coming from the engine when idling so I know there are some wearing parts. The Yaris is bigger, safer, drier with a new 1. To check operation of the valve, pull off the hose from the valve (this will require a bit of patience and grunting. With the engine idling at normal operating is caused by oscillating cam timing, diagnostic temperature CHT above 93 °C (200 °F) apply. I've been experiencing intermittent engine knocking sometimes during idle and sometimes when with power or when anti stall is kicking in. Seems like it is coming from the fuel injectors, since I listened via a metal rod touched to the fuel pipe. Possible clutch??. NON-Chrysler: Operate the engine at high idle for 5 minutes or until engine reaches 140°F. I have an issue with my 91 300CE 24v. Abnormal combustion, more commonly known as knock or detonation, has been the limiting factor in internal combustion engine power generation since the discovery of the otto cycle itself. Bearing failure, metal debris riding on contaminated oil, piston ring defects, siezing, knocking, crying. The terms valve clatter, pinging, pre-ignition and detonation describe the strange rattle or knock coming from an engine. It is pretty loud and my stepdad said I shouldn't ride it The tempo is the same as the engine. Intermittent vibration at idle maintenance & nonperformance. 2) It only makes the noise when the engine is warm. Diesel engine compression readings average approximately between 275 psi to 400 psi, depending on the design and compression ratio. A leak will cause a "lean mixture" condition, when the flammable fuel (carburetor cleaner or propane) comes in contact with the source of the vacuum leak the engine idle speed will raise as the engine has received "fuel". It can indicate overheating or that you are in too high a gear for the engine to cope with. I hear slight ticks coming from the engine when idling so I know there are some wearing parts. Intermittent front end clunking noise was created by Lone Fox 2011 Ford Fusion SE 2. With the engine idling at normal operating is caused by oscillating cam timing, diagnostic temperature CHT above 93 °C (200 °F) apply. then i hear a knocking sound in the back of the intake manifold intermittent. Pay attention to cylinders #5 and #1 in the waveform. Usually a knock will be a "one-to-one" type noise, and usually is more pronounced in the engine oil pan. 5 diesel tdi engine,5 cylinder when i first start up engine in morning, no noise can be heard, even when driving it, untill its warmed up, then there is a clunking/ sound now and again , sounds like it comming from the top, but not sure, engine runs fine , no loss of power, sounds like a tappet or something,. I originally thought this was a timing chain rattle. This is an intermittent problem but annoying as it can last up to 2-3 weeks. NON-Chrysler: Operate the engine at high idle for 5 minutes or until engine reaches 140°F. Strange Intermittent Ticking Noise of a lifter tick type noise that occurs cold at idle or 10 to 15 minutes after a cold start. Select PIDs VCTDC, VCTDC2, and CHT may exhibit an intermittent rattle noise/rough idle when engine is at operating temperature. I get this constant low whine noise and can only be heard when the engine is at idel or at very low speeds like pulling out of my driveway. the noise still comes and goes. I think there was a noticeable change in the noise but it did started each time and ran on 3. bought a reman from Mercedes Benz. This is very annoying and sometimes embarrassing. I had to run 92 octain. It was running ok and suddenly started running slower and started making the knocking noise. As belt speed increases, the belt noise may blend into one audible noise, but most likely diminish in intensity such that it won’t be detected. My previous 6th gen with 35k made the same noise, so im inclined to think its normal, however my paranoia or OCD wont let it go until I know what the source is. My 2012 Prius v, which has done about 47,000 km, has intermittently developed a knocking sound when the IC engine is idle, or while driving at a low speed (under 30 km/h). This noise is not the injector ticking noise, I know what that is and can hear it separately. It sounded like maybe it wasn’t firing on all cylinders so we disconnected the leads one by one and started it up each time. I just started hearing some intermittent light knocking from the engine while running at idle. On mine, one of the torque converter bolts backed out, thus hitting the flywheel. Checking your vehicle's fluid levels is always a good idea to maintain the overall longevity of the engine. It seems to go away when I Increase the RPM and is really only noticeable when the car is in gear at a low. Truck would misfire and rough idle after engine was warm. Welcome to our listing page for Generic Check Engine Light Codes. Also, sometimes it will start knocking at an idle, run rough while the rpm's drop and then die. Let the engine idle for 15-30 seconds and reevaluate whether the noise is still present or not. These are the things that make you hate mechanics Try checking the brake booster. There is no high pitch or squeeking noise. The Harley V-twin engine is characteristically noisy. Car has a rough idle and intermittent vibration at highway speeds. Vehicle Won't Start or Engine Noises Main Bearing Noise. Usually a knock will be a "one-to-one" type noise, and usually is more pronounced in the engine oil pan. With the engine idling at normal operating is caused by oscillating cam timing, diagnostic temperature CHT above 93 °C (200 °F) apply. It is fine all other. Once the knocking starts, it can either settle by itself or lead to an engine stall. I have this sound coming from my engine at idle that is driving me nuts as it's causing me to keep thinking something is wrong with my SH 2. The PCM regulates engine intake air at idle with an electronically controlled device called an idle air control (IAC) valve. Got my 2015 fiat 500 sport used (auto, non turbo, 45,000km/28,000miles on it). I have a 2005 Ford Escape 2. What's that intermittent death rattle in my SBC? and only makes the noise a little bit at fast idle. If I start the car about an hour after previously driving it, the knocking appears. It has about 200 hrs. It also appears to be coming from the top of the engine to the rear of the intake manifold more than anywhere else. Diesel or gas should not make difference here for the steering pump. The pistons are what move up and down and make the engine spin. You mentioned that the noise was heard from the top area. This noise only happens intermittently and ONLY when in idle with your foot on the break (like when I'm stopped at a red light). This time as soon as the check engine light stopped blinking I started the car and it still surged between 1000 and 2200 rpm so I put it in 1st and slowly let out the clutch and brought the engine speed to idle-650rpm. The noise with lack of a better description sounds like a chain hoist. Replaced it with a new one from ID Parts and noise disappeared. My new Nissan Titan (2017) with 5. There are some ways to narrow down where the knocking is actually coming from. So engine is torn apart, and I have I found forged pistons and rods locally , and if funding is ok I want to try and purchase them. Can't be any simpler to knock out. If the noise is a steady metallic rap, it may indicate a rod/rod bearing. It's related to road speed, not engine speed, and it's coming from one side of the car, so I'm pretty sure it's a wheel. The "cackie" noise may by caused by pressure variation within the fuel rail and in virtually all instances is attributed to cylinder #8 (driver side rear). For a long time it has had a dieseling problem sometimes at idle. 6 SE with 93k - I have recently (for last month or so) noticed a knocking sound from engine at start-up. Could it be my timing chain? When should the timing chain and tensioner be changed? What about the VVT? Any insight would be greatly appreciated. You hear a whistling noise coming from under the hood: Check the hoses for vacuum leaks. Rate of ticking seems to keep time with engine but then accelerates even as engine stays idle. I just started hearing some intermittent light knocking from the engine while running at idle. Possible cylinder head or valve damage on the GM 2. All modern cars have idle switches on anything that will put a load on the engine while idling. Hey guys my names Daniel new to the forum i have an 02 tundra 4wd access cab unlimited. These problems do need to go to a Yamaha dealer so a warranty claim can be submitted so Yamaha will address the problem. The noise with lack of a better description sounds like a chain hoist. Citroen DS3 Rough Idle and Check Engine Light. That is an interesting thought, it is definitely possible, however I am wondering if the noise would be at a greater tempo, since it has so many revolutions. Engine stalling problems are often temperature related. All symptoms seem to go away when the car is shut off and restarted, but only temporary. 350 small block knock at idle rpms i have a chevy 350 small block that knocks at idling rpms. Even after it sits for two hours. I would think if it was a rod it would knock all the time and increase along with the engine speed. nobody seems to be able to figure out anything that could be making the noise. I have a 2012 Chevy Cruze, the engine idles rough and kind of jumps when idling at a stop light. This is just my theory in regards to what may cause a rough idle: The gas in the tank might have degraded especially if it has been sitting on the lot since the middle of last year.