HELP Still no fire (sometimes) 86 944 Turbo
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All wiring correct Ski...when I do get fire from coil the car starts and runs exceptionaly well...thats the rub...sometimes fire sends from coil just fine and the car checks out great...when it doesnt fire... i do not get a pulsed signal to ground on the coil when cranking....ps...the car has never shut down while running...the problem only occurs when restarting
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Ditto! I just found that one of the ref. sensors I had replaced several years ago got damaged. The wire was crushed, probably when reinstalling the intake manifold at some point. I never checked because, hey they are both fairly new. Before finding that, the car would be difficult to start, but would start up and run fine with starter fluid. The tach needle moved a little but now, with a new ref. sensor it moves quite a bit more while cranking.
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Freaking ref sensors. I've replaced mine once but dang if they're not bad again. When everything else has been replaced and you still have infrequent "no starts" the culprit for our cars is almost 100%, reference sensors.
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If the sensor is installed to spec, it's not the sensor, but a fray in the wire...SOMEWHERE. It's not just one lead all the way to the DME. Mine frayed at the end of the lead to the DME, rather than the lead to the sensor.
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Yes, but even the associated wires for the ref sensors are still part of the sensor assembly are they not?
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The sensors have a plug on them. The usual suspect for bad wires is the car side of the plug. Wiggle the plugs and wires around CAREFULLY and see if it will start.
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Yep. Look for frays at or near the plugs. The sensors themselves usually only "fail" if they are set too close to the flywheel and get eaten up.