Pontiac Problems? Ask a Mechanic for Answers ASAP
Hello JACUSTOMER, is the security light on in the vehicle when cranking the engine?
Yes it is one for the first attempt to start it. It is off on further attempts to start if the ignition is not returned to off.
The security light turns off when the ignition is taken to start (remains off while cranking) and then remains off.
Okay. Lets start by reseting the security system. Turn the key on to the run position for 10 minutes then turn it to the off position. Turn it again to the run position for 10 more minutes and then off. Do this one more time. After the third time see if it starts. If it does not then you may have a failing crank position sensor.
No dice. What is a crank position sensor?
This is a sensor on the engine that tells the computer the speed of the engine and when to fire the plugs and injectors. I would also be sure to check the fuel pressure before replacing any parts. You will need a fuel pressure tester for this.
When the ignition is taken to on, I can hear the fuel oil pump run for a few seconds pressurizing the system. Would any of these issues be an indication of an ignition switch problem?
It is possible that it is an ignition switch issue. You can check this with a DMM if you have one.