2000 pontiac grand prix gt

Asked by Sandra Jul 16, 2018 at 05:00 PM about the 2000 Pontiac Grand Prix GT

Question type: Maintenance & Repair

I have a 2000 pontiac grand prix gt with the 3800
engine. It turns over but wont start could it be the
main computer. It will not pick up any codes.

4 Answers

27,460

I don't know what testing you have done? Make sure battery has a full charge and connections all good. Have a helper crank it while you visually check for spark at the plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse, engine cranking. If you want to see if computer is awake, turn on the key, check for ref voltage for any sensor that uses a ref voltage, use a digital multimeter. If nothing, then check voltage and ground circuits for computer. As far as code reader/scanner, pin 16 at datalink connector has to have voltage or the code reader won't work. Just my opinion.

140

The crankshaft position sensor and camshaft position sensor need the car running to throw a code, and won't let you know with only switch on or motor cranking. Bad cam sensor car will still run, bad crank sensor car aMIGHT not start. Current goes in to ICM then to crank sensor. Crank sensor then tells ICM where and when to send fire to plugs.

I had the same problem as n the sensor was bad. It would start the just cut off as n when I messed with the wires it started. That certainly sounds like your having the same problem.

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