Died on road. No spark, no tach bounce. Help! - Saab 900 Bulletin Board - Saabnet.com
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Died on road. No spark, no tach bounce. Help!
Posted by RayF (more from RayF) on Mon, 26 Jan 2015 19:51:46
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Car started this a.m. fine, 10 degrees out. Later I drove it a few miles, and while parking it it died of its own. Restarted and died, then restarted and I moved it to a better spot, where it died again. When I went to leave it started to roar to life and died, then no sign of wanting to start though it turned over fine, plenty fast.
So my intermittent no-start on cold mornings has maybe finally resolved itself into total failure - - Oh boy, now I get to figure it out.
Rejoined AAA and got it towed home, ahead of the threatening storm, and put the timing light on it and find no spark. And the tach needle doesn't move at all while cranking, just a tiny bounce at ignition on and ignition off.
From what I read that's a sign of a bad crank position sensor. This is an '89 NA, hall sensor on the oil pump cover under harmonic balancer.
I happen to own an old distributor with the oval hall sensor connector, no vac capsule on it, Bosch number 0237 506 009. Whatever I pulled it from I also had the wisdom to clip off and take away the connector and several inches of its wire, just stripped the housing and copper wrapper and cotton strings away from its end and find three wires, red, green and black.
Am I sure enough that the CPS is the problem to clip thru the wires leading to it and splice them instead to this distributor and try it? Or could the ignition magnifier or whatever it is, below the coil, be my problem? Can't that be bypassed and eliminated, anyway?
posted by 71.173.7...
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