CRANKS BUT WON'T START

  • Tiny
  • Zackblades02
  • 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?

Sunday, August 12th, 2012 AT 9:21 PM

12 Answers

  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

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

Was this
answer
helpful?
Yes
No
Sunday, August 12th, 2012 AT 9:23 PM
  • Tiny
  • Zackblades02
  • Member

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

Was this
answer
helpful?
Yes
No
Sunday, August 12th, 2012 AT 9:36 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

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

Was this
answer
helpful?
Yes
No
Sunday, August 12th, 2012 AT 9:50 PM
  • Tiny
  • Zackblades02
  • Member

Replaced the cam sensor and still wouldn't start

Was this
answer
helpful?
Yes
No
Monday, August 13th, 2012 AT 5:02 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

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

Was this
answer
helpful?
Yes
No
Monday, August 13th, 2012 AT 6:02 PM
  • Tiny
  • Zackblades02
  • Member

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

Was this
answer
helpful?
Yes
No
Tuesday, August 14th, 2012 AT 1:16 AM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

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?

Was this
answer
helpful?
Yes
No
Tuesday, August 14th, 2012 AT 3:26 PM
  • Tiny
  • Zackblades02
  • Member

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

Was this
answer
helpful?
Yes
No
Tuesday, August 14th, 2012 AT 5:05 PM
  • Tiny
  • KHLow2008
  • Expert
  • 41,976 posts

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

Was this
answer
helpful?
Yes
No
Tuesday, August 14th, 2012 AT 5:37 PM
  • Tiny
  • Zackblades02
  • Member

Tested with noid light and it did not flash

Was this
answer
helpful?
Yes
No
Friday, August 17th, 2012 AT 12:18 AM

Please login or register to post a reply.

Similar Questions