Mechanics

CRANKS BUT WON'T START

1998 Pontiac Grand Prix • 200,000 miles

I have a 1998 Pontiac grand prix it will crank but won't start. Has no fuel pressure and no injector pulse. It has spark. I replaced fuel pump, filter, relay and fuses. What should I do?
AD
Avatar
Zackblades02
August 12, 2012.




Was the MIL indicating?
It could be a fault with the cam sensor if the injectors are not pulsing.

KHLow2008
Aug 12, 2012.
No MIL light. How do I check the cam sensor?

Tiny
Zackblades02
Aug 12, 2012.
You can't test the CMP sensor. You can only test the voltage from PCM to the sensor.

KHLow2008
Aug 12, 2012.
Replaced the cam sensor and still wouldn't start
AD

Tiny
Zackblades02
Aug 13, 2012.
Are you still missing fuel pressure and injector pulse? Did you test the fuel pump operations?

KHLow2008
Aug 13, 2012.
Hooked a hot wire to the fuel pump and had fuel pressure but still wouldnt start. I also replaced ignition control module. Somebody told me it could be wiring in the steering column

Tiny
Zackblades02
Aug 14, 2012.
There are so many possibilities and it does not matter what anyone says. We need information to get the problem resolved.
At injector connector, do you have battery voltage at one of the wire with ignition switch turned on and while cranking?
Does spraying starting fluid into the throttle fires up engine?

KHLow2008
Aug 14, 2012.
There is 12v at every injector. Have not tried starting fluid yet.

Tiny
Zackblades02
Aug 14, 2012.
If you have a noid light, disconnect an injector and attach the noid light over it to test if it pulses.

KHLow2008
Aug 14, 2012.
Tested with noid light and it did not flash

Tiny
Zackblades02
Aug 17, 2012.

AD