1991 Pontiac Grand Prix my car wont start up

CAMERON91

MEMBER
1991 PONTIAC GRAND PRIX

Engine Mechanical problem
1991 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic 153k miles

i have a 91 pontiac grand prix that my aunt gave to me for a graduation present i've had it since May and now its giving me problems like not starting up its just spinning over like its not getting any gas or something but my uncle is fixing it but he says i've blowed the computer in car because of the subwoofers I put in it. Instead of me putting the power wire on the positive battery cable I put it on a screw that run to the positive battery cable. What could it be?

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Do below to determine if its fuel or spark problem

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine at least 3/16 away from ground -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs, coil's resistances, distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it