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Pontiac Repair/Fuel problems?


QUESTION: I have a 92 grand am that will crank but won't start. Took the inlet side of the fuel line off of the filter and turned the key on to see if it would squirt out and it did. I can't find the shraeder valve anywhere that they say is on the fuel rail. How and where do I check the pressure. Thank you!

ANSWER: Hi chris:
I'll assume this has a 4 cylinder engine in it? if so they do not have a pressure tap. you need aguage with adpators to put it in line with the filter. if it's a V6 the valve is right on the fule rail on the engine. did you check for spark and injetor pulse? you need a noid light to check the injetor pulse do not use a test light. for check spark on that engine you can just tak the coil assembly off the top of the engine (4 cylinder) and hold the pis of the coils about 1/4" waya from the top of the engine with the coil assembly still plugged in have some one crank the engine over you shoukd have spark on all 4 tips. if you have spark and injetor pulse it's either a fuel pressure issue or an engine mechanical issue. if you have no pulse and no spark chances are it hs a bad crank shaft position sensor. good luck :-)

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QUESTION: Where is the crank shaft position sensor?

it's in the bottom of the engine block under where the oil filter is. it has a 2 wire connetor on it the wires are purple and yellow.  If you have to replace it use care when remocing then have a tendency to get "stuck" in the block. carb cleaner and penetrating oil will aid you getting it out If you need to.

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Todd Puccio


General auto repair,electrical issues,driveability issues,anti-lock brakes,SIR systems,HVAC,engine performance,Gm specific. I have worked at my current dealership since the 1990 model year anything much older than that I have limited exposure to. I do not have very much transmission experience so those question you may want to ask of another expert. When you send me a question let me know the exact make/model/engine and year for the car or suv you have it makes it easier to answer the questions that way. If your happy with the answer I gave you please feel free to Donate. This is a free service to you and I am not compensated at all by this web site. I have 22 years of experience to share with you and my knowledge wasn't free to me. I had to pay for my education.


Experience in the area: I have been a technician in GM dealerships for over 22 years and I am a ASE master technician. I work at a Buick and GMC truck store Previously I worked at a Pontiac GMC store for 18 years. I Served a a lead technician when dealership was on a team system. I just recently moved to a Buick,Hummer,Saab Store when my franchise was purchased by this dealership. Organizations: ASE master technician


Education/Credentials:High school diploma,2 year vocational school degree 2 year college degree. Associates degree in applied sciences (auto technology)Awards and Honors: GMC master technician

Awards and Honors
Master GMC truck technician Master ASE technician in 9 categories

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