Cranks will not start

Tiny
DONALD111716
  • MEMBER
  • 1998 PONTIAC GRAND PRIX
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
Hello, I have the car listed above supper charged. Cranks will not start. Has spark. Fuel pump is not activating but tested and works, relay good, fuse good. Fuel injectors getting twelve volts, but not working noid not flashing on crank. Starting fluid makes car run. Any ideas?
Thursday, May 3rd, 2018 AT 8:11 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,336 POSTS
Hi and thanks for using 2carpros.com. Based on your description, it seems there is either a broken or damaged power supply or a ground issue.
First, here is a general overview of how an electrical system works:

https://www.2carpros.com/articles/how-a-car-electrical-system-works

You will need to test wiring using a test light or multimeter.

https://www.2carpros.com/articles/how-to-check-wiring

Now, I have attached a wiring schematic of the fuel system's electrical system. I would recommend starting at the relay to make sure there is power. If there is, you will need to then check for power at the pump itself. If there is no power, follow the supply back until you can locate where it is lost. It is not an easy job, but can be done.

I hope the schematic helps.

Thanks,
Joe
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Thursday, May 3rd, 2018 AT 7:32 PM
Tiny
DONALD111716
  • MEMBER
  • 4 POSTS
Hello, sorry, I have been busy working on other cars and just got back to this car. The fuel pump relay is not being triggered. I can manually trigger it and get fuel pressure to the fuel rail. However, I am still not getting any activation for the fuel injectors they have twelve volts but not making the ground pulse.
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Thursday, May 10th, 2018 AT 8:07 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,261 POSTS
Hello,

These cars had problem with the crankshaft position sensor. Here is a guide to help you see what you are in for when doing the job:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

Here is the location for your car. Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Sunday, May 13th, 2018 AT 11:52 AM
Tiny
DONALD111716
  • MEMBER
  • 4 POSTS
Okay. I ordered the part got it in a few days ago and just replaced the crankshaft position sensor no change in the car. Still will not start.
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Friday, May 25th, 2018 AT 8:13 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,261 POSTS
Time to start checking the pink wires for power check the PCM power fuses and grounds. Here is a guide to help you get started:

https://www.2carpros.com/articles/how-to-check-wiring

Please run down these guides and diagrams and report back.

Cheers, Ken
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Sunday, May 27th, 2018 AT 1:31 PM

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