Quote:
Originally Posted by iqraceworks
Yep....if one injector acts up and goes slightly lean when the motor is being pushed to the max, the DME might adjust the fuel too all 3 cylinders in the bank, but the lean one will still beat leaner than there others. I'm guessing this is what might've happened.
Not much safety factor when you are pushing close to 600hp at 25psi of boost on cast pistons. I don't think these N54's are really as bullet proof as people think they are.
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So your dark sooty spark plug is in #4 not #2?
I would say do what you suggested and get a new piston.