Trying to locate the knock sensor on pontac grand prix gtp 2000
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SOURCE: Location of mass air flow sensor, 2000 Grand Prix GTP
3.1 or 3.8 motor, mass air flow is in the fresh air (goes from air cleaner to engine)
SOURCE: 2002 Pontac Grand Prix GTP P0171 code engine stumbling at times
Bank 1 is the frt side exhaust manifold (did they say bank 1 sensor 1?),you can start by replacing that sensor,i would check the intake for leaks ,the gm 6cly. are known for bad intake gaskets,you will see oil coming out form the frt or rear of the intake,also check your atifreeze overflow bottle for bronwish sludge,which means that the oil is mixing with the antifreeze.A leaking intake could cause that lean condition.
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