1991 PONTIAC GRAND AM ENGINE WILL NOT RUN

  • Tiny
  • hogie09
  • 1991 Pontiac Grand Am

Computer problem
1991 Pontiac Grand Am 4 cyl Two Wheel Drive Automatic 154380 miles

When trying to start this 2.5 engine, I can mist starting fluid over the throttle-body, and it will runand removing the fluid it dies. We removed the wires from the injector in the throttle-body, used a test light to check for voltage, and it, s there. There is a red wire, and a blue wire. Using a testlight, I hooked it, s negative on the neg. Post of the battery and stuck the probe in the end of the red wire, and cranked the engine. It had voltage. Then, I clamped the negative on the test-light on the pos. Side of the bat. And there was no light on the blue wire. Could it be a computer problem? All fuses are good. It, s a 4 Tech if that means anything.

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Saturday, November 6th, 2010 AT 9:50 PM

3 Replies

  • Tiny
  • Service Writer
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Maybe I am not reading correct, but if you supply starting fluid it runs, correct?

Did you check fuel pressure. It Must be in spec. What is the pressure at?

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Sunday, November 7th, 2010 AT 3:39 AM
  • Tiny
  • KHLow2008
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Hi hogie09,

Thank you for the donation.

Test indicates the PCM is not grounding the fuel injector circuit. Check for continuity between the injector Blue wire and PCM terminal # W1. If continuity is available, the PCM is most likely faulty.

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Sunday, November 7th, 2010 AT 3:41 AM
  • Tiny
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Thanks Low!

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Sunday, November 7th, 2010 AT 8:26 AM

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