Learning how to test a GM distributor less ignition system rather then guessing an replacing parts is the proper way to diagnose . Pulling a couple of pull wires of the same coil an having someone crank the engine over to see if there is spark would the first test . If there is no spark ,could be the ignition module , or the crankshaft postion sensor .
GM 3 8L Ignition Control Module And Crank 3X 18X Sensor Test
SOURCE: motor runs rough no power 1989 pont.grand prix. 3.1 motor
unplug your harness for your transconverter clutch for transmission,this will not harm your transmission. i had this problem on a 91 grand am
SOURCE: 2005 Pontiac grand prix 3.8 doesn't start
Try this: Turn ignition on for AT LEAST 10 minutes without doing anything else. After 10 minutes, turn the key to start, thre is a good chance of it running. Long explanation, but it has to do with the PassLock security system futzing up.
SOURCE: 1992 Pontiac Grand PrixPower loss,erratic idle
spark plug gaps are very critical on computerised cars!! [some wont even start!]
distributor module may be breeaking down as temp rises they fail!
otherwise do compression check as it may have valve problems
also check plug leads & injectors aswell as the fuel pump pressure [ could bestarving for fuel]
SOURCE: I have a 1989 Pont Grand Prix, it will idle
Grand Prix ... my fave, too.
It is the "accelerator pump" on the carb; or rather the rubber diaphragm inside the accelerator pump.
The pump "arm" is visible on the top-front of the carb. Maybe the arm got loose or disconnected, but it's most likely the diaphragm inside.
The accelerator pump squirts extra gas when you stomp it.... while the fuel pump tries to keep up, but can't...
Maybe $10 at any auto parts store...
Testimonial: "Thanks for the suggestion, but my 89 Crand prix is equiped with a throttle body,it don't have a carb."
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