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engine knock

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Is it Safe to Drive With a Faulty Knock Sensor?
Symptoms of a bad or failing engine knock sensor include slow acceleration, reduced fuel economy, and the Check Engine Light turning on.
How Long Does an Automatic Timing Advance Unit Last?
The automatic timing advance unit is a component in vehicles with diesel engines. Of course gas and diesel engines both work on the internal combustion principle, but they are quite different,...
How Long Does an EGR Temperature Sensor Last?
Are you familiar with the EGR (exhaust gas recirculation) system in your car? If not, this is something all modern cars have. The purpose of this system is to greatly reduce...
How Long Does an EGR Control Solenoid Last?
In order to help reduce the amount of engine emissions cars have what is called an EGR system, which is an exhaust gas recirculation system. The way it works is that...
Symptoms of a Bad or Failing EVP Shut Off Solenoid
Common signs include poor cold start performance, the Check Engine Light coming on, and failing an emissions test.
What Does It Mean When an Engine "Knocks"?
You enjoy listening to the purr of the engine as you cruise along the highway. When you hear some strange sound coming from under your hood, you may panic. A knocking sound can be...
Symptoms of a Bad or Failing Automatic Timing Advance Unit
If your car experiences engine knock, sluggish performance, or excessive black smoke, you may need to replace your automatic timing advance unit.

Related questions

Question
Had my truck serviced, was told the issue was a knock sensor. One day later the same issue occurs with the reduced engine. 2008 Chevy Silverado 1500
Hello - your engine has 2 knock sensors. The failure of one or both of them was recognized by engine management, and power is reduced in order to avoid engine damage. I would recommend knock sensor replacement - times 2,...
Question
Hello, I have a 2009 328i coupe manual with no maintenance issues. Went to start it and a hard knocking coming from the engine
BMW has had some issues with the valve lifters on that model car, so that is the first thing that leaps to mind, though most people describe the lifter noise as a "tick"rather than a knock. engine oil pressure and...
Question
Engine knock
Hello. If the engine knock started after a few cold nights then it may be possible that it is related to the engine oil. Engine oil becomes thicker at lower temperatures, which makes it more difficult to pump for the...
Question
There is an awful clunking rattling noise when the engine is running.
Hi there. There could be either the engine is having a bearing slap on the rod bearings with too much wear causing the noise or an accessory on the engine is locking up making the belt tensioner pop back and...
Question
Knocking noise from engine and oil seems to be full? Loud and constant what could it be?
Hello, thank you for writing in. Engine knock can be caused by several different issues. Even with the oil full, if it is not being sent to the places in the engine that need it. Low oil pressure can be...
Question
Makes a loud clunk noise when I try to start it
Hi there. Sounds like the engine may have water in the cylinder, fuel in the cylinder, or the timing chain may have broken. Try turning the engine over by hand with a breaker bar. If the engine will not move,...
Question
Knock sensor 2000 Chevrolet Lumina
Hi - first task is to recheck what codes are still present that represent a "knock sensor failure". There may be an additional problem that has changed engine timing (worn timing chain for example) that is causing an engine knock...
Question
Why is my engine making a knocking noise.1997 Saturn SL2
Hello. If you know that the timing chain is off then the engine should not run. If the timing is correct but the chain is loose due to other issues then that may be the knocking noise that you are...
Question
Ford 5.4 knocking noise under load or high rev 2007 Ford E-250
Hi there - engine knocking under a load, or when "snapping" the throttle open, is usually worn connecting rod bearings. With your advanced mileage, this would not be unusual. I would recommend an engine noise inspection by a mobile, professional...
Question
It's a long noise when I'm driving ,like a clacking - hard noise under the right passenger side .Could it be the CV shaft?
Hi there. If the vehicle was driven for more than 1 mile with the engine oil at only about 2 quarts, then the bearings have burned and now are knocking. The right side of your engine now has an engine...
Question
Engine light came on. Car drives slow and stopped going in reverse. Could it be a knock sensor or is it the transmission?
Hi there. If the vehicle is driving slow and will not go into reverse, then the computer could have the engine in limp mode due to either the transmission not shifting into reverse. If there was no signs of gear...
Question
Loud knocking noise and engine is shaking.
Hi there. When passing a vehicle and turning off the overdrive at the same time with the pedal on the floor will be like trying to shift a vehicle without the clutch in a manual transmission driven vehicle. The rpm's...
Question
Knock sensor 2009 Pontiac G3
Hi there - the knock sensor on this engine is under the intake manifold, just behind the power steering pump, and is best seen and accessed from underneath the car. For assistance with a replacement, have a knock sensor replacement...
Question
Why does my Rolls Royce Ghost make a knocking noise when turning
Hello. Typically this noise will occur on full turn when you have the wrong size wheels on it or if it has a worn out ball joint. Most of the time this is caused by a ball joint. The vehicle...
Question
Knock Sensor + Wiring Harness installation cost? Will YourMechanic install parts if I provide them?
Hello. Yes we will install parts that are provided by you but doing so will void our warranty. You will also be charged for the technicians time if the part you provide does not fit properly. After we install the...
Question
engine full of gas
Hi there. The issue is the fuel pump relay is malfunctioning and causing the fuel pump to pump to much when it is not demanded. The knocking noise is the fuel going into the cylinders and hydrolocking the cylinders. I...
Question
Getting knocking sound when engine is idling from the floor front and side of the engine
Hello, thank you for writing in. The knocking is going to sound worse at idle because the number of combustion cycles happening is less than when you are accelerating or maintaining a higher RPM. With that being said, engine knock...
Question
Last night I was driving home and I heard this knocking noise, a minute later the noise went away and my check engine light came on.
Hi there. The noise you heard could have been the engine knocking due to a lack of engine oil. If the brake pedal is pressed and the oil light comes on, then the oil level could be low causing the...
Question
Cut out engine rattled then kept going as if never happened
On this engine you may have a problem with the valve seats in the engine coming loose or the variable valve system is not working as it should. If the check engine light is on then have system scanner to...
Question
I've got a knock it increases when I push on the gas should I just replace the engine?
Hello, and thank you for writing in. A knocking noise may be coming from the engine or the exhaust. Without pinpointing the exact location of the repair, it is very difficult to compare your options truthfully. An exhaust leak will...

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