Loses power, pings, tack drops to 0 and does not work and track off light comes on. Can stop and restart engine and tack will start working and track off light will go off.
Run the fault codes with a scanner to determine where the faulty sensor is
SOURCE: 1999 pontiac grand prix gt 3.8L v6 cranks wont start
Is the security light on? If you have spark and fuel, it should run. Any codes? Could be bad crank sensor or cam sensor.
SOURCE: 2002 Pontiag Grand Prix GT 3.8 Runing rough and stalling at stops
sound like vacuum leak or fuel pump problems.scan it to see if egr valve sticking open.
SOURCE: power window on 1999 pontiac grand prix gt 2 door
what I would recommend is that you will have to test the window actuator first. You will need to remove the door panel to get at the actuator. From there, just jump the actuator to see if the window goes up or down. Don't worry about which terminal is positive or negative, they are switched back and forth by the control switches.
SOURCE: My car loses power sometimes and I can have the
Could be many things but,i would put my money on a weak fuel pump.Check your fuel pressure it should be 41-47 psi with key on engine off.If its not within these specs replace pump and filter.
SOURCE: pontiac grand prix dies while driving
I would have your Alternator checked out, If i'm not mistaken i believe most auto parts store like Auto Zone can actually test it for you.
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