SOURCE: 2004 Nissan Quest - Engine chatter/knocking
Ther e is a chance your injectors are leakin g down and there is excess fuel in the cylinders. Not a good thing. So, you fuel pressure and injectors need chkg. good luck
SOURCE: A few months ago my
with th o2 sensor it was runnig in open loop for a few months, my guess is the spark plugs are fouled, inspect them
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