CRANKS BUT WON'T START

1998 Pontiac Grand Prix

Tiny

Zackblades02

August, 12, 2012 AT 9:21 PM

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?

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12 Answers

Tiny

KHLow2008

August, 12, 2012 AT 9:23 PM

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

Tiny

Zackblades02

August, 12, 2012 AT 9:36 PM

No MIL light. How do I check the cam sensor?

Tiny

KHLow2008

August, 12, 2012 AT 9:50 PM

You can't test the CMP sensor. You can only test the voltage from PCM to the sensor.

Tiny

Zackblades02

August, 13, 2012 AT 5:02 PM

Replaced the cam sensor and still wouldn't start

Tiny

KHLow2008

August, 13, 2012 AT 6:02 PM

Are you still missing fuel pressure and injector pulse? Did you test the fuel pump operations?

Tiny

Zackblades02

August, 14, 2012 AT 1:16 AM

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

KHLow2008

August, 14, 2012 AT 3:26 PM

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?

Tiny

Zackblades02

August, 14, 2012 AT 5:05 PM

There is 12v at every injector. Have not tried starting fluid yet.

Tiny

KHLow2008

August, 14, 2012 AT 5:37 PM

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

Tiny

Zackblades02

August, 17, 2012 AT 12:18 AM

Tested with noid light and it did not flash

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