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INTERMITTANT NO-START SOLVED (I THINK) 900 1993

As I said to Newguy in a separate post, I think I have finally solved my intermittant no start by resoldering the LH2.4 Relay. I know, Duh, its the relay, but I had to do it the hard way by connecting a pressure gauge to the injector rail and mounting it in front of the windshield. When it finally failed on me, I looked with great satisfaction at the guage as it dropped to zero. I then looked for 12 volts on pin 46/2 and found nothing. As a last resort I read the FAQs and found that the signal at 46/2 occurs only when cranking and it is probably some kind of square wave. I detected a signal of about .2 volts and proceeded to warm up all the connectins on the relay and also checked the diode to make sure is was ok.
Lessons learned: 1) It's the relay, stupid. 2) Allways read the FAQs.
Also, big news: I think the engine is running much better since I fixed the relay. I have a vacuum gauge connected to the engine and it seems to be running at a higher vacuum in all conditions and seems to have more power. If you look at the schematic, The other side of this relay interfaces with almost all the components in the LH 2.4 system, so maybe they are benefitting from the relay fix. Any comments?

Al Stensby






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New INTERMITTANT NO-START SOLVED (I THINK) [900][1993]
posted by  Papa Al subscriber  on Tue Aug 1 16:19 CST 2006 >


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