Bad Vtc Actuator SymptomsWhile this has eliminated the startup grind (forn now, anyway), there is now a rattle when I accelerate from a stop. But only when cold and only when accelerating from stop. Many blend door actuators have a built-in feedback sensor that keeps the climate control module apprised of the door’s position. The problem is colder temps = heavier oil = oil not getting to VTC quick enough = VTC pin not pumping up with oil to lock into place = rattle. The plaintiff says she paid for. How much will a new VTC Actuator on my 2008–2012 Honda Accord cost? Pricing for the VTC Actuator can range from $585–$845. Symptoms Of A Bad Oil Control Valve (VVT Solenoid) The most common symptom of a bad VVT solenoid or oil control valve is a check engine light on your dashboard. Over time that small drag stresses the timing chain TENSIONER, until it. The most common symptoms of a bad VVT oil control solenoid are much the same across all applications but be aware that what might appear to be a solenoid failure and/or malfunction might not necessarily involve an actual failure of the solenoid. The most common symptoms of a bad VVT oil control solenoid are much the same across all applications but be aware that what might appear to be a solenoid failure and/or malfunction might not necessarily involve an actual failure of the solenoid. VSA Light after VTC replacement">Pending Fault P0341 and VSA Light after VTC replacement. Honda replaced the VTC actuator (almost 100,000 miles). How Will You Know That You Have A Bad VTC Actuator? You will notice some specific signs and symptoms when there is any problem with the VTC actuator. Has anyone else NOT fixed their VTC Actuator problems?. Here are some common symptoms that hint towards having a bad VVT switch: 1. What You Need to Know About Driving With a Bad VTC Actuator. A bad variable valve timing VTC actuator or bad cam phasers can cause a rattling noise on a cold start. Those cam actuators do have a screen on them that can become clogged if the oil is becomes too worn out, dirty, and bad from not being changed when it should be. There were rumors that Honda was working on a fix, which turned out to be an updated part that. The engine may not run properly and may even stall. The bad VTC causes a drag on the timing chain every time it grinds at start-up. com%2fdriving-with-a-bad-vtc-actuator%2f/RK=2/RS=1tFpxRDiYRHNaz6bt3W2xVCl32s-" referrerpolicy="origin" target="_blank">See full list on spoke-n-word-cycles. No high idle, no weird noises, no. As with the V6 VCM, though, Honda has since addressed this issue with a TSB, #09-010. The vehicle may also experience reduced power and acceleration. What are the symptoms of a bad vtc actuator?! 2008 Accord Sedan V6 Satin Red Full dip Morimoto h1 quad retrofit (HIDILLUSIONZ) 4300k low 3000k fogs Demon eye projector mod JDM Badges Front/Back Acura TL-SHAWD IM cover Debadged 28% tint all around Switchblade Key Takeda SRI/Magnaflow Cat-Back Megan racing test pipe Hawk 5. What Are The Symptoms Of A Bad Variable Valve Timing Actuator? Variable valve timing actuators will inevitably fail at some point and begin making noise. Replaced with new OEM VTC actuator recently together with Hybrid racing tensioner. A VCT solenoid allows oil pressure to enter the camshaft phaser, which controls the timing of the camshafts through the PCM. I immediately turn off because grinding sound is INSANE. The vehicle may also experience. Sound similar. Honda VTEC Solenoid Symptoms 1. Reasons for Problems and Cost of. P2110 and P2112 are some examples of DTCs that are related to a bad actuator. Old chain reused as I measured against brand new and no signs of. If your Honda VTEC solenoid fails, the valve frequency does not advance or retard as it should. Honda VTC Actuator gone bad Branli Maldonado 125K views 3 years ago FIX Impala Loud Tapping Noise in Dash! How to Replace HVAC Vent Blend Door Actuator ALL 3 LOCATIONS! How-to and Reviews. When the PCM activates the VVT/VCT system, it opens an oil control solenoid to allow oil to act on the actuator. I'm pleased to report the VTC actuator issue for my 2012 Honda CRV EX was resolved at my local Honda Dealership and at no charge under the 60,000mi powertrain warranty. Honda VTC Actuator Class Action Lawsuit Certified. Does your engine rattle on startup? A bad variable valve timing VTC actuator or bad cam phasers can cause a rattling noise on a cold start. The last two days I've noticed a loud rattle/grinding noise when I start the engine for the first time. Bad VTC actuator? And how would. According to Samarins, the rattling actuator seemingly didn’t cause any internal damage. problem im experiencing is driving issues and hard to start and cant rev 4000 rpm, thanks You probably have a bad VTC actuator, but may also be a wiring problem, but doubt it. There's a new VTC actuator available, part #14310-R5A-305, as a replacement for original part #14310-R44-A01. I'd make sure you've got your ducks in a row before you try and serve them. What Are the Symptoms of a Bad Electronic Actuator? Your vehicle has a complete loss of power. i have a 2006 civic si, engine is throwing code p1009 which is vtc actuator malfunction. Replaced with new OEM VTC actuator recently together with Hybrid racing tensioner. Honda replaced the VTC actuator (almost 100,000 miles). There is a Honda Service Bulletin that details the repair, and a link has been posted below to the most current version at the time I posted this, which is March 17, 2016. Reasons for Problems and Cost of Replacement. Diagnosing a Bad Throttle Actuator Aside from a failed actuator, throttle spring failure and TP sensor malfunction can also cause your vehicle to go into fail-safe. VCT Solenoid – What are the Signs of a Faulty Solenoid?. The problem is colder temps = heavier oil = oil not getting to VTC quick enough = VTC pin not pumping up with oil to lock into place = rattle. In addition to the faulty VTC actuator, while they were looking the car over they noticed that the timing chain was stretched. Symptoms of a Bad or Failing Variable Valve Timing (VVT) Solenoid Common signs of a faulty VVT solenoid include the Check Engine Light coming on, dirty engine oil, rough engine idle, and decreased fuel economy. Rough vibration during start-up. When the driver operates the temperature knob or lever on the dash, power is sent to the actuator, causing the device to move the blend door in one direction or another. Honda VTEC Solenoid Symptoms 1. Similar to the old startup grinding noise but less pronounced. It only happens for about a second and is only present on cold start. Just got my 2017 back from the dealership yesterday after having my VTC actuator replaced (I had been having the same symptoms as everyone else, i. Most Common Symptoms that Indicate Crankshaft Piston Sensor Failure White Smoke From Exhaust: Main Causes and How to Fix 1. You have low- or over-boost, meaning either your vehicle is lagging or overcompensating when you accelerate. Plus it's at 106k miles which isn't bad for a 2011 imo Reply. There's a lot of confusion surrounding VVT solenoid operation, as well as the symptoms associated with a bad VVT solenoid. Bad VVT Solenoid Symptoms: What You Need to Know. I am having issues with my VTC actuator (RBB) giving rattling sounds when cold starting and intermittent during various rpm between 2 to 4000rpm (Sometimes it doesn't happen at all). That’s why we’re here to shed some light. There’s a lot of confusion surrounding VVT solenoid operation, as well as the symptoms associated with a bad VVT solenoid. If a VTC actuator is not replaced, the consequences can be severe. Also, owners have started complaining of early VTC failures and timing chain components failing (which are also symptoms of oil degration). However, the PCM monitors the degree of rotation with a sensor. Check Engine Light is illuminated. Over time that small drag stresses the timing chain TENSIONER, until it eventually fails. When the vehicle is under load, the VVT switch will monitor the engine and send information to the computer to adjust the valve timing as needed. I will also link a few videos I found that are of people swapping their actuators. The effect of the pressurized oil is to rotate the camshaft either against or along the direction of rotation (of the camshaft) to advance or retard the valve timing. How to Replace a VTC Actuator (Complete DIY Guide). As long as your noise is the VTC actuator and you're under warranty, they will fix it. Vtc will require lifting the left side of the engine to remove the vtc controller. That's why we're here to shed some light. Some of you may know of the VTC actuator rattle on newer Honda K24's, it has been an ongoing issue for 8 years. If there is hard vibration during start up, VTC could be going bad. problem im experiencing is driving issues and hard to start and cant rev 4000 rpm, thanks. Actuator Replacement Cost. · #2 · Oct 13, 2016 (Edited) If your VTC actuator was bad for some time before you replaced it you may have a stretched timing chain. i have a 2006 civic si, engine is throwing code p1009 which is vtc actuator malfunction. On a different note, it's not hard to change out the vtc, but if you have a CEL for it, the filters are clogged, and you should change your vtec solenoid screen and front screen as well. Grinding Noises from the Engine. Here are some common symptoms that hint towards having a bad VVT switch: 1. 5 hours later, and this time, the actuator noise begins AND DOESN'T STOP. The original part number was 14310-R44-A01 and the replacement (as of some time in March of 2016) is 14310-R5A-305. The Check Engine Light may also be illuminated on the dashboard if there is an issue with this component. Symptoms of a Bad or Failing Variable Valve Timing …. Hi there, my 2008 Honda Accord has the same issue and I’m looking at fixing it as well. When it fails or malfunctions, it can cause a range of symptoms that can be hard to diagnose. Grinding Noises from the Engine. The top three most common problems with the 2014 CR-V are: Engine noise due to faulty VTC actuator Delayed acceleration and shaking, uncontrolled acceleration TPM malfunction causes the tire pressure gauge warning light to not function properly These problems can be a concern, but not all of them are dire. A clatter or knock is heard when the actuator is being started since the oil pressure isn't maintained. new VTC actuator rattling. Pending Fault P0341 and VSA Light after VTC replacement. A bad ignition switch won’t be able to supply power to the starter motor, ignition system, and other engine controls, preventing the engine from starting. turbob18 said: i have a 2006 civic si, engine is throwing code p1009 which is vtc actuator malfunction. From what i have experience, it will still phase as its suppose to however that is a good indication that it is beginning to fail. One of the most common symptoms of a bad VTC actuator is a grinding noise coming from Engine Misfires. Symptoms of a Bad or Failing Variable Valve Timing (VVT) Switch. VCT Solenoid System Components. If there is hard vibration during start up, VTC could be going bad. Hi there, my 2008 Honda Accord has the same issue and I’m looking at fixing it as well. Further information on this is available on many CRV forms where owners have had these items. The plaintiff says she paid for a replacement Honda VTC. What are The Symptoms of a Bad Blend Door. Could this be the timing chain tensioner, or maybe the VTC actuator? Guess I'll be planning a trip to the dealer soon :frown https://www. I know there has been a lot of problems with other owners getting this fixed, or even positively diagnosed, so I have a few questions for anyone in-the-know. Although it is a PZEV model in which the VTC Actuator carries 15 year or 150,000 mile warranty in these models, I no longer operate the vehicle in a PZEV state so no help there either. com/_ylt=AwrFfbAtol9kfLEXS8tXNyoA;_ylu=Y29sbwNiZjEEcG9zAzMEdnRpZAMEc2VjA3Ny/RV=2/RE=1684017837/RO=10/RU=https%3a%2f%2fspoke-n-word-cycles. Bad vtc actuator caused catastrophic engine failure!!. Hello everyone, I have a '13 Si that has the known VTC Actuator rattle on cold start-up. One of the symptoms of a bad VTC actuator is rattling during a cold start. Knocking Noises – Another noticeable sign of low and dirty engine oil symptoms is knocking noises and loud sounds from your engine. With most cases, especially early on, the problem only presents these symptoms in near or below-freezing temperatures, and when the car has sat for a long enough period for the oil to drain (typically resulting in a cold-soaked start). how do u tell if its bad, any specific symptoms. Just got my 2017 back from the dealership yesterday after having my VTC actuator replaced (I had been having the same symptoms as everyone else, i. But again at 28,000 miles, even that is very very unlikely. The bad VTC causes a drag on the timing chain every time it grinds at start-up. Q: What are the dangers of driving with a bad VTC actuator?. fixed their VTC Actuator problems?">Has anyone else NOT fixed their VTC Actuator problems?. upon start up, have someone place their hand over the Valve cover in the area where the vtc is. Now if your engine is making noise when it starts and such, it is common for the vtc actuator assembly or timing chain tensioner to be having issues, so a timing chain replacement is required to fix. · #2 · Oct 13, 2016 (Edited) If your VTC actuator was bad for some time before you replaced it you may have a stretched timing chain. If you are getting a crank position sensor code then your chain is most likely stretched. The VTC actuator is an important part of the engine’s Variable Timing Control (VTC) system which helps to optimize the engine’s performance. What I can tell you is if I start driving the car right away without letting it idle first I will on occasion hear the same noise at around 3500rpm for a s. If a VTC actuator is not replaced, the consequences can be severe. gregk24 Thread starter Joined Apr 13, 2013 Messages 9,104 Location FL, USA Nov 21, 2016 #7 Originally Posted By: Mr Nice Were you aware of this problem before you bought this generation Accord ?. The top three most common problems with the 2014 CR-V are: Engine noise due to faulty VTC actuator Delayed acceleration and shaking, uncontrolled acceleration TPM malfunction causes the tire pressure gauge warning light to not function properly These problems can be a concern, but not all of them are dire. I would almost guarantee this is the VTC Actuator problem many of us have with our Si's, and some of the older CR-V's (any DOC engine with the "i"-VTEC). What Are The Symptoms Of A Bad Variable Valve Timing Actuator? Variable valve timing actuators will inevitably fail at some point and begin making noise. This is a common problem in Honda 2. turbob18 said: i have a 2006 civic si, engine is throwing code p1009 which is vtc actuator malfunction. This is the 3rd actuator they have replaced for me. Replacement of the VTC actuator does not require the complete removal of the timing chain and associated parts, but this may be a good time to do so, depending on the mileage and mechanic’s diagnosis. Bad VTC Actuator Symptoms include a rough idle, loss of power, misfires, stalling, and poor fuel economy. Labor costs are estimated between $453 and $572 while parts are priced between $292 and $292. I did not have this sound when previous faulty actuators were replaced but it is there. We used to have an old Ford farm truck with a staight 6 in it that had an oil pan leak. Bad Blend Door Actuator: Symptoms, Location, & Replacement FAQ. The valves from the intake of either cylinder 2 & 3 or 1 & 4 WILL result in a tensioner to fail and a fantastic collision of the valve with the piston. What Are The Symptoms Of A Bad Variable Valve Timing Actuator? Variable valve timing actuators will inevitably fail at some point and begin making noise. This happens when there is no hydraulic pressure inside the actuator because the engine oil is still cold. Jan 30, 2015 #23 With most cases, especially early on, the problem only presents these symptoms in. AccordRVT said: I;ve been reading about this issue and it seems only 08-09 Accords are affected. VTC actuator cause ">My contribution to the "does a faulty VTC actuator cause. Check Engine Light On This is the thing about modern cars that the ECU or engine control unit starts to warn you as soon as it finds some problem in the engine. But it was annoying and, because the actuator controls the camshaft timing, if it failed, it could’ve damaged the engine. The original part number was 14310-R44-A01 and the replacement (as of some time in March of 2016) is 14310-R5A-305. Genuine Honda VTC Actuator - 14310-R5A-305. What Happens If I Don’t Replace My VTC Actuator?. My contribution to the "does a faulty VTC actuator cause. You probably have a bad VTC actuator, but may also be a wiring. Your location and vehicle may affect the price of Variable Valve Timing Actuator Replacement. Important reminder from Richard McCuistian, ASE-certified Master Automobile Technician: Although the electronic throttle body has an internal spring designed to close the throttle plate for safety, the PCM triggers the motor and its gears to drive the throttle blade. Another symptom of a faulty VTC actuator is engine misfires. The effect of the pressurized oil is to rotate the camshaft either against or along the direction of rotation (of the camshaft) to advance or retard the valve timing. Engine power is lower than usual at high speeds. Replacing a VTC actuator is therefore essential to keeping a vehicle running smoothly and preventing costly repairs. How Will You Know That You Have A Bad VTC Actuator? You will notice some specific signs and symptoms when there is any problem with the VTC actuator. gregk24 Thread starter Joined Apr 13, 2013 Messages 9,105 Location FL, USA Nov 21, 2016 #7 Originally Posted By: Mr Nice Were you aware of this problem before you bought this generation Accord ?. VVT has the ability to generate more power or save more fuel depending on the phase of the camshafts. how do u tell if its bad, any specific symptoms. Engine fully rebuilt with all new parts and less than 5k miles and is still under run in mode with no more than 3500 rpm of driving. Is it possible my VTC is going bad as well? Click to expand. A bad variable valve timing VTC actuator or bad cam phasers can cause a rattling noise on a cold start. Diminishes after the car warms up - present but less pronounced. As many have discussed previously, the Honda 1. You may also notice issues with the performance, like rough idle, rough acceleration, increased fuel consumption, or low engine power. I always thought the VTC was on the cam gear itself but I could be wrong. Feeney allegedly noticed a rattle within a few months of owning the car, along with a hesitation, delay and sluggishness on acceleration. It is essentially a spool valve controlled by an electronic circuit. This may include having the check engine light on, or a rough idle engine. How Will You Know That You Have A Bad VTC Actuator? You will notice some specific signs and symptoms when there is any problem with the VTC actuator. Hard starting in cold temperatures. Rough engine idle Proper ignition timing is crucial to ensuring that your engine runs smooth and efficient. What Happens If I Don't Replace My VTC Actuator?. The result of VTC actuator complete mechanical failure is catastrophic. Honda VTC Actuator gone bad Branli Maldonado 125K views 3 years ago FIX Impala Loud Tapping Noise in Dash! How to Replace HVAC Vent Blend Door Actuator ALL 3 LOCATIONS! How-to and Reviews. Honda has said that the issues around the VTC in the k24 do not affect long term health as well. I know there's been a lot of back and forth about whether a faulty VTC actuator causes damage to the engine or if it's just a noisy nuisance. net">Valve timing control (VTC) oil control. Symptoms (9 Different Signs). 4 engines including the Accord and. The problem is colder temps = heavier oil = oil not getting to VTC quick enough = VTC pin not pumping up with oil to lock into place = rattle. I have went through 3 already with various cams. Old chain reused as I measured against brand new and no signs of stretching. 4 engines including the Accord and CRV among. Driving with bad vtc actuator? : r/Honda. As a result, the engine suffers from performance concerns such as choppy idle and weak. One of the most common symptoms of a bad VTC actuator is a grinding noise coming from Engine Misfires. If it's not the VTC actuator or you're not under warranty, they're gonna think your a moron for thinking they're gonna fix it for free. I am having issues with my VTC actuator (RBB) giving rattling sounds when cold starting and intermittent during various rpm between 2 to 4000rpm (Sometimes it doesn't happen at all). Honda VTEC Solenoid Symptoms. Symptoms Of A Bad Oil Control Valve (VVT Solenoid) The most common symptom of a bad VVT solenoid or oil control valve is a check engine light on your dashboard. What are the Symptoms of a Bad VTC Actuator? Grinding, rattling, or knocking noise from the engine. Both parts have detailed instructions guides from Honda that can be found online. 5 Bad VTC Actuator Symptoms to Look Out For Automobile: Bad VTC Actuator Symptoms. The bad VTC causes a drag on the timing chain every time it grinds at start-up. Check Engine Light On This is the thing about modern cars that the ECU. If your VVT solenoid is experiencing issue due to a faulty oil control valve,. Variable Valve Timing Actuator Replacement Cost. A clatter or knock is heard when the actuator is being started since the oil pressure isn’t maintained. What are the Symptoms of a Bad VTC Actuator? Grinding, rattling, or knocking noise from the engine. A: Common symptoms of a faulty VTC actuator include rough idling, poor acceleration, decreased fuel efficiency, and increased emissions. AccordRVT said: I;ve been reading about this issue and it seems only 08-09 Accords are affected. In most cases, that mechanism is an actuator (also known as a phaser) at the end of the camshaft (though some vehicles, such as Hondas with VTEC, may have a different design). I purchased my 2012 Accord over a year ago and it had the rattle from the time of purchase. Now there’s two things that I am aware of that need replacing, the VTC actuator and the VTC actuator gear. Variable Valve Timing Actuator Replacement. The most common symptoms of a bad VVT oil control solenoid are much the same across all applications but be aware that what might appear to be a solenoid failure. A bad variable valve timing VTC actuator or bad cam phasers can cause a rattling noise on a cold start. What Are The Symptoms Of A Bad Variable Valve Timing Actuator? Variable valve timing actuators will inevitably fail at some point and begin making noise. I would also check the TCT while you checking it all out. a lot of them ended up having this issue confused with a bad starter motor. Replaced with new OEM VTC actuator recently together with Hybrid racing tensioner. Diminishes after the car warms up - present but less. Honda VTEC Solenoid Symptoms 1. You probably have a bad VTC actuator, but may also be a wiring. Nonetheless, common symptoms could include one or more of the following-. In most cases, that mechanism is an actuator (also known as a phaser) at the end of the camshaft (though some vehicles, such as Hondas with VTEC, may have a different design). 5 Symptoms of a Bad Oil Control Valve (VVT …. With most cases, especially early on, the problem only presents these symptoms in near or below-freezing temperatures, and when the car has sat for a long enough period for the oil to drain (typically resulting in a cold-soaked start). Bad VTC Actuator Symptoms include a rough idle, loss of power, misfires, stalling, and poor fuel economy. VTC actuator cold start grinding. Your vehicle has a complete loss of power. Ignition Switch Problems: Signs, Causes, What to Do. Since these sounds will be very noticeable to everyone in the cabin, this is a symptom that is easy to recognize before the problem gets any worse. The most common VTEC issues we see are, in order of frequency: very low engine oil levels that result in starvation under hard accelleration, faulty VTEC oil pressure switches, faulty VTEC oil control solenoids, sludged / clogged oil passages in the VTEC oil control circuit, wiring harness / connector terminal damage, bad PCM. Symptoms of a Bad or Failing Variable Valve Timing (VVT) Solenoid. In most cases, that mechanism is an actuator (also known as a phaser) at the end of the camshaft (though some vehicles, such as Hondas with VTEC, may have a different design). There’s a lot of confusion surrounding VVT solenoid operation, as well as the symptoms associated with a bad VVT solenoid. With the timing chain tensioner no longer keeping the chain at constant tension a skipped or broken chain is just a question of time. Keep in mind, however, that engine issues may also be caused by other electrical and mechanical problems, such as a dead battery or a faulty starter solenoid. VTC Actuator?">What Happens If I Don’t Replace My VTC Actuator?. This may include having the check. A: Common symptoms of a faulty VTC actuator include rough idling, poor acceleration, decreased fuel efficiency, and increased emissions. an engine rattle upon cold start). Among the most common signs of a faulty VTEC solenoid is a poor idle at low RPM that only clears at high RPM. The trouble with the bad VTC actuator is that over time the cam gear getting hung up and dragging the chain stretches it a tiny amount every time it happens. Bad VTC Actuator">What You Need to Know About Driving With a Bad VTC Actuator. Diminishes after the car warms up - present but less pronounced. Just got my 2017 back from the dealership yesterday after having my VTC actuator replaced (I had been having the same symptoms as everyone else, i. There also appears to be a workaround: "According to a CRV board, this problem goes back as far as 2008, so Honda has been "working on a fix" for a long time. I've bought brand new Hondas which have had go go back go dealer because problems arose. Symptoms Of A Bad Oil Control Valve (VVT Solenoid) The most common symptom of a bad VVT solenoid or oil control valve is a check engine light on your dashboard. This is a work-around for the Honda VTC actuator grind / rattle on cold start. The top three most common problems with the 2014 CR-V are: Engine noise due to faulty VTC actuator Delayed acceleration and shaking, uncontrolled acceleration TPM malfunction causes the tire pressure gauge warning light to not function properly These problems can be a concern, but not all of them are dire. Not common as most people fix it before it gets that bad. 5 Bad VTC Actuator Symptoms to Look Out For Automobile: Bad VTC Actuator Symptoms. But this only happens on occasion, and I've only heard it in sub 30 degree weather. Could this be the timing chain tensioner, or maybe the VTC actuator? Guess I'll be planning a trip to the dealer soon :frown https://www. 3,331 Posts. That said, when it is really cold out side (below 30) and I start my car, occasionally I also hear a rattle for about 1-2 seconds. The most common VTEC issues we see are, in order of frequency: very low engine oil levels that result in starvation under hard accelleration, faulty VTEC oil pressure switches, faulty VTEC oil control solenoids, sludged / clogged oil passages in the VTEC oil control circuit, wiring harness / connector terminal damage, bad PCM. What happens if I don't replace my vtc actuator?. by Timothy Charlet on January 13, 2016 Vehicle Engine Mechanical Inspection Cost Service Location SELECT YOUR VEHICLE $0. The damage is so small and happens over such a long time that the car will probably run just fine right up until it exceeds the mechanical limit. What Is a Throttle Actuator? Function and Symptoms of Failure …. On a different note, it's not hard to change out the vtc, but if you have a CEL for it, the filters are clogged, and you should change your vtec solenoid screen and front screen as well. There are a few signs that you're experiencing electronic actuator failure. I tried starting it several times, same thing keeps happening: VTC Rattle won't stop. A long term effect of running a bad VTC is chain stretch, along with failure or weakening of the tensioner. Every month at some point it would run dry of oil and start knocking pretty bad, we would drive it 5 miles to the gas station, knocking, put oil in it and the knocking would stop. What Is a Throttle Actuator? Function and Symptoms of Failure Explained.