No Start, no pulse to ECU, 88 SPG - Saab 900 Bulletin Board - Saabnet.com
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No Start, no pulse to ECU, 88 SPG
Posted by Ed N [Email] (more from Ed N) on Fri, 9 Jul 2010 09:41:00
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My 1988 SPG is once again not starting (which makes me happy since I can't fix an intermittent problem when its not in a failure mode).
There is good spark. Jumping fuel pump energizes pump, but engine does not start.
I've swapped the main and fuel pump relays, swapped the LH 2.2 ECU with parts that I know (or strongly suspect) are working (since I had them in the car temporarily when the car was starting). No joy.
I will do the Bently tests at the LH 2.2 ECU plug, but I suspect there is no ignition pulse to the ECU (and therefore no activity at the fuel injectors).
Question: Can the ignition amplifier on the left fender well fail in such a way so that there is spark to the plugs but no pulse to the ECU?
I'll find out tomorrow when I test with a good digitial voltmeter. Just curious if anyone knows.
-thanks
Ed N
posted by 130.167.31...
Posts in this Thread:
- No Start, no pulse to ECU, 88 SPG, Ed N, Fri, 9 Jul 2010 09:41:00 <-- Viewing This Message
- Re: No Start, no pulse to ECU, 88 SPG, painter, Fri, 16 Jul 2010 07:38:53
- Re: No Start, no pulse to ECU, 88 SPG, painter, Thu, 15 Jul 2010 06:50:38
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