1999 Pontiac Grand Prix car wont turn over

1999 PONTIAC GRAND PRIX
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JOSE LUIS LOPEZ
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Electrical problem
1999 Pontiac Grand Prix 6 cyl Front Wheel Drive Automatic 223.22 miles

i was using the car when i gave it cas the car just shut down. iv changed the fuel pump the computer the coils the module plugs the wires. timing chain. im ready to burn the car can u help
i have pontiac grand prix gtp 1999
May 2, 2010 at 11:52 AM
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INTERNETMECHANIC
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Are you saying the vehicle cranks good but won't start, or, it won't even crank? If it won't even crank, I'd check the starter circuit. If it cranks good but won't start, have a helper crank it while you visually check for spark at the plugs. If you have spark everywhere, use a gage and check fuel pressure. Some of the national brand autostores used to loan out a fuel pressure gage, if you don't have one.

To check for spark at the plugs, pull a spark plug wire, stick a known good plug or spark tester in the boot. Ground metal part of plug/tester to metal part of engine, watch for spark, engine cranking.

Check for any applicable trouble codes, at the least, to check for codes, you need an obd2 code reader.
May 2, 2010 at 12:05 PM
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JOSE LUIS LOPEZ
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iv change fuel pump and filter. changed plugs and wires. coil and wires. computer, checked pressure for fuel and the car well start for a second but shoots down still
May 2, 2010 at 12:14 PM
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INTERNETMECHANIC
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Is the theft/security lite on the dash, on or flashing when it stalls. The security system may be disabling the fuel injectors. Have the trouble codes checked, see if anything shows up.

The possibilities as far as no code diagnostics, the list is as long as your arm.
May 2, 2010 at 12:57 PM
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