Engine will not start

LEROY9

MEMBER
1991 SATURN SL2
4 CYL
FWD
AUTOMATIC
180,000 MILES

Sunday, November 14th, 2010 AT 3:17 AM

2 Replies

LEROY9

MEMBER
20 POSTS

I have been communicating with Louie on this issue for a while and have a reply back to his last question which is in quotes. "There's your problem the dark blue wire's shouldn't have power it should be the ground control from the pcm. Here's what I would do unplug all the pcm connector's and see if you still have power to the dark blue wire's to the injector's. If you lose the power then plug the connector's back into the pcm and see if the power come's back. Let me know what you find."

Here is what we found: With key on and PCM plugged in both wires had power.
Disconnect the PCM and power is lost on the control side of the injector. Still have power on the battery side.

We are wondering if there is a ground fault issue or voltage surge causing PCM damage. Could I really have three faulty PCM's?

Thank you,
Larry

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Sunday, November 14th, 2010 AT 3:27 AM

SATURNTECH9

MECHANIC
30,869 POSTS

Sorry I haven't responded back to you I haven't gotten email alert's to let me know if you have responded back or been able to even go thru my posted answer's to see if you did since the launch of the new site there still working all the bug's out. But here's what I would to do to narrow it down to the pcm if the power goes away when you unplug it from the pcm on the ground control side of the injector connector. With everything plugged in unplug the injector fuse and unplug the injectors see if you still have power to the ground control from the pcm. If you do then unplug the pcm connectors and use a ohms meter and see if the ground control and power wire's are connected.

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Sunday, November 14th, 2010 AT 9:12 PM