Wacky Ignition! Hall effect, ECU or what? Diagnosis? - Saab 900 Bulletin Board - Saabnet.com
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Wacky Ignition! Hall effect, ECU or what? Diagnosis?
Posted by Craig [Email] (more from Craig) on Wed, 19 Feb 2003 18:47:01
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87T...heres the facts:
Car has "missed" in times of high humidity ie. post rain.
Hall effect external wiring clip to distributor broken 100K ago...but functionally intact
Lately, the car cranks and cranks w/o starting the ONLY ignition I get is after I turn the key off...then a brief post ignition rumble.
With a jump, she eventually starts.....acts like weak spark or few cylinders firing...have to keep turning starter as the engine intermittently fires....eventually it comes up and idles fine. It will drive perfectly (with occaisional bogging down/missing...same as when high humidity) throughout the day, but in the AM, back to zero.
My impression from previous experience is that the ECU and Hall effect are either working or not...all or none.
I believe it is receiving fuel because I can smell it and it appears to be wet around exhaust manifold gasket and turbo gasket after lots of cranking.
Plugs/wires/cap/rotor all fairly new.
I guess the main question is what might be affected by humidity (maybe??) and may eventually spiral into a no start scenerio? Is there some sort of face on the hall effect that can get corroded (and cleaned) or is it a sealed unit? any help would be appreciated....my very reliable car has become a crap shoot!
posted by 152.163.188...
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