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your ignition timing is too far advanced. if it is an older car (60's-70's) it could be the grade of gasoline you are buying. try going up to mid-grade fuel.

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Q: Why does my car knock under a load?
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If your knock sensor goes out how would your car run?

You would probably hear a spark knock or pinging under acceleration or load. Check engine light may come on also.


What does a engine do when the knock sensor is bad?

Ping under acceleration or under load.


What problem could the knock sensor cause on your car?

If the knock sensor failed the CEL (Check Engine Light) would be illuminated and the engine may "ping" or "spark knock" under load. Serious "spark knock" can damage the engine if allowed to continue.


If knock sensor is broke off can you drive or does it have to be replaced?

You can drive the car but if the engine should ping (knock) under load, the knock sensor won't be able to tell the computer to retard the timing. Excessive pinging can damage internal engine parts.


How can you tell if your knock sensor is bad?

Not much goes wrong with them! if your car is pinging under load this may be a bad knock sensor, but if you tap the block with a small hammer & the idol seems to change or the timing wanders this is the knock sensor failing. if the idol doesn't change this is a bigger issue


Why does a 1999 Subaru Forester hesitate under load?

Could be a bad knock sensor. The ECM may be retarding the timing based on bad input from a faulty knock sensor.


Ford 4.6 Spark Knock Under load Where is the knock sensor located?

it depends on what engine you have but most of them are a 5.4 or 4.6 or 4.2 and those have the knock sensors under the intake manifold on the passenger side.


Why would truck spark knock under load with premium gas in use?

Running hot or timing too far advanced


What does it mean when the car engine is under load?

when it is under load it means that more and more is being demanded from the engine, be it from speeding up or turning on all auxillaries


Why does your engine knock when you accelerate but then stop after a while?

The engine is overloaded in case it of generator set or any other load and in case of a car the vehicle is not engage in lower gear as per load and engine rpm.


Where is the spare tire on a pt cruiser?

Beneath the car, under the rear load space.


Where is the knock sensor location on 4g63t eclipse?

The knock sensor is located just below the intake manifold youll have to get under the car to see it, it goes right into the back of the block.