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Another 850 no start - one try to fix 850 1995

posted by  thaywood on  Tue Mar 27 16:43 CST 2012
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last visit: Sun Jun 29 08:38 CST 2014
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Son's 1995 850 is a no-starter. No warning. Car was fine, running errands, after one of the stops it won't start.

Starter runs but engine doesn't even try to catch. Battery seems good - cranking sounds strong (over the phone) and he also tried jumping.

Found some notes related to no-start condition. Seems that likely causes are:
- crank position sensor (will set a code?)
- fuel pump relay (no code)
- MAF sensor (not sure, but maybe no code)

Because he had been driving the car I do not suspect lawn mower syndrome. However, if all else fails can try cranking with gas pedal floored after above if any chance that'll work.

Think I have one opportunity to diagnose remotely before he has to have it towed. Plan is:

1. Check codes (I know how to do that)
2. If no code them jumper the fuel pump and try to start
3. If no success then disconnect the MAF and see if it will start in limp-home mode

Anything else I can have him try? He is working in a parking lot and does not have a lot of tools.

Thanks for your help,

Terry





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