Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello, my name is***** for the question. Can you tell me if the check engine light is coming on?
Thank you. One last question. How many miles are on the car?
If the engine is shutting down like that it is typically due to a failure in the fuel pump control or in the ignition switch. It can also be in the ignition module located under the ignition coil pack. Did you get that 50 psi of fuel pressure when the engine turns off?
It does sound like the ignition module under the coil packs. You can remove it and most auto parts stores can test it for you. This is the most common cause. It can also be a relay issue or the ignition switch but that is not as common.
So it will continue to run fine if you give it some gas?
Does your scan tool read live engine data? If it does can you tell me what the ltft and stft readings are?
Can you see oxygen sensor voltage? If so can you tell me if the reasons are fluctuation and what the maximum and minimum voltages are?