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Cranks but won't start

Tiny
ZACKBLADES02
  • MEMBER
  • 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? Far as I know the injectors are working it sound like we're getting fuel I think we got spark it just won't start
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Sunday, August 12th, 2012 AT 9:21 PM

14 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Was the MIL indicating?
It could be a fault with the cam sensor if the injectors are not pulsing.
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Sunday, August 12th, 2012 AT 9:23 PM
Tiny
ZACKBLADES02
  • MEMBER
  • 6 POSTS
No MIL light. How do I check the cam sensor?
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Sunday, August 12th, 2012 AT 9:36 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
You can't test the CMP sensor. You can only test the voltage from PCM to the sensor.
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Sunday, August 12th, 2012 AT 9:50 PM
Tiny
ZACKBLADES02
  • MEMBER
  • 6 POSTS
Replaced the cam sensor and still wouldn't start
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Monday, August 13th, 2012 AT 5:02 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Are you still missing fuel pressure and injector pulse? Did you test the fuel pump operations?
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Monday, August 13th, 2012 AT 6:02 PM
Tiny
ZACKBLADES02
  • MEMBER
  • 6 POSTS
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
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Tuesday, August 14th, 2012 AT 1:16 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 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?
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Tuesday, August 14th, 2012 AT 3:26 PM
Tiny
ZACKBLADES02
  • MEMBER
  • 6 POSTS
There is 12v at every injector. Have not tried starting fluid yet.
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Tuesday, August 14th, 2012 AT 5:05 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
If you have a noid light, disconnect an injector and attach the noid light over it to test if it pulses.
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Tuesday, August 14th, 2012 AT 5:37 PM
Tiny
ZACKBLADES02
  • MEMBER
  • 6 POSTS
Tested with noid light and it did not flash
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Friday, August 17th, 2012 AT 12:18 AM
Tiny
MAUPAD
  • MEMBER
  • 1 POST
Hello, I have the same car, same year and the same engine problem, have you figured out the problem so you can help me please
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Monday, December 24th, 2012 AT 3:25 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Did you perform the test and come to the conclusion that the injectors are not firing?
Did you try if starting fluid works?
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Monday, December 24th, 2012 AT 12:30 PM
Tiny
DONALD111716
  • MEMBER
  • 4 POSTS
Hello, I have the same car same problem, done same tests fuel injectors not firing and yes starter fluid will make the car run perfectly for a short time anyway. Any help?
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Thursday, May 10th, 2018 AT 8:13 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 42,840 POSTS
When you turn the key to the on position without staring the engine do you hear the fuel pump running in the tank?

Also can you confirm the absence of injector pulse hear is a guide.

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Please run down this guide and report back.

Cheers, Ken

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Sunday, May 13th, 2018 AT 11:38 AM

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