Want to have fun with you engine?
Of the MANY sensors that monitor engine functions, one of them is a knock sensor. If the enging starts to knock it will retard (pull)the timming. So, do you know how to check to see if your knock sensor is working? Take a hammer and TAP (do not beat the sh-- out of the engine) on the engine block while the engine is running and you will see the computer pull timming out. The engine speed will change right in front of you.
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