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'Knocking' is a technical term for fuel igniting too early in the combustion chamber.

It can be resolved by adding anti knock additives to the fuel or by retarding the timing at the relevant revs. Most modern engines have built in knock sensors that do this automatically.

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13y ago
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16y ago

there could be a problem with the timing of engine (ie) spark knock or bad gas

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15y ago

The noise ie engine due to bad quality of petrol

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Q: Why is your car knocking when you drive - could there be a problem with the suspension?
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What could be the problem if your car sputters a little when you drive it then shut it off for less than 15 minutes and start it back up?

I had the same problem with a jeep wrangler and I replaced the throttle position sensor and that solved my problem.


Knocking noise when engine is idling?

Lucas (oil additive) it and pray..if its a rod just drive it easy..if it is spark knock use better gas. answer the door sorry bout that, but if engine is knocking is it at idle, under load,etc knocking can be caused by piston slap,(worn out rings),bad bearings,or simply have engine tuned, all depends where knock is coming from


How long can you drive with oil leading into the radiator?

Oil in the radiator indicates a possible severe problem, where coolant could also leak into the oil. Driving an engine in this situation at all could lead to severe engine damage.


Why did your car make a loud noise than shut down?

Well it could be a number of things. If the car will not start or even turn over it may have seized the engine or spun a connecting rod bearing which is a major problem. If it does start up again and the loud noise continues, sounding like a knock u should not try to drive it to the shop. Shut it off and call a towing company. If it starts back up and doesn't make any noise it may be fine. Just keep an ear out for pinging and knocking sounds.


1996 E-150 ford van and when i drive it the abs light come's on what does this mean?

A malfunction has been detected in the ANTI-LOCK BRAKE SYSTEM , could be a fuse , a sensor , or some other problem

Related questions

What part of rear is suspension knocking now its lowered?

If the knocking is when you hit a bump it could be your axle hitting the frame, or you need shorter swaybar links.Make sure your pinon angle is correct or you will were out your drive saft u-junts.


What could cause knocking on the passenger rear side of a rear wheel drive car?

u knocking on it


When you drive your car and you a knocking noise what could it be?

Let the body out of the trunk, alternatively it could be a homeless man at the window.


Why does your car make a knocking sound when you drive?

Could be a rod knock. Your bearings slipping in the engine.


If car is making a knocking noise?

possibly distributor. tow to mechanic . if you drive , you could damage your engine.


What causes a knocking noise from the front of the car when accelerating but stops when braking?

The engines timing could be advanced to much. If it's a front wheel drive a CV joint could be going bad. Knowing a more precise area of where the sound is coming from might help to identify the problem.


What causes knocking in the front end and it goes away when step on the brakes?

Front Wheel Drive, could be bad CV Joints, Could be Control arm Bushings...


Is the temporary removal of your privilege to drive?

suspension of drivers licence.


What does it mean when you are driving and the rear wheel is not turning?

If only one wheel is not turning, this would indicate a serious problem with that wheel. Depending on if it was a driven wheel or not, it could be a problem with the brake, the bearing, the differential or driveshaft. Continuing to drive will likely cause damage to tyre, wheel, suspension or drive. It is also likely to have severe effects on the vehicles handling.


I drive a 2000 ford Expedition Why has truck rear end on left side dropped is there a suspension problem?

May be a broken spring or support


What could be knocking underneath while towing a trailer with a 1992 jeep wrangler. could it be the u-joints on drive line?

it may be your wheel bearings or lug nuts also


Why does your car shake and drive rough?

If your car is shaking it could be poor suspension alignment can cause a car to shake and vibrate, and other possible causes are bent or worn suspension parts, old tires, bent wheels and bad brakes. If your car sounds especially rough at speed, the problem could lie with the car's spark plugs and wires. Spark plugs fire more frequently the faster you drive, and the engine will sound rough when they begin to fail.