1985 turbo died on highwy - lost pwr to fuel pump etc. - Saab 900 Bulletin Board - Saabnet.com
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1985 turbo died on highwy - lost pwr to fuel pump etc.
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Posted by brownie (more from brownie) on Mon, 20 Feb 2012 09:17:12 Share Post by Email
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Hi, My trusty 16valve 1985 turbo has been trouble free for many years so it was very surprising that it stopped running and left me on the side of the highway during a road trip last weekend. Other than replace a window switch, I hadn't done any recent work.

On the highway it was running great, then suddenly began to run very rough and stalled out a minute after I pulled over to the shoulder. It wouldn't start again. Hall effect connections are intact and tight, and no turbo hoses are popped off.

I have to do some more systematic testing, but I determined that no power was going to the fuel pump and even with the pump hotwired, the engine still won't start. I'm getting spark. I need to run some tests at the system and fuel pump relays, and I guess the ECU is suspect too.

Are there any other LH Jetronic components that could shut down power to the fuel pump and/or injectors? I think the lack of power is my biggest clue. I know the overboost switch can stop power to the pump, but my switch has been disconnected for years.

Thanks for any feedback you can offer. I always expect that things can go wrong, but there was really no warning at all.

posted by 157.229.6...

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