1996 Cadillac Deville V8 Front Wheel Drive Automatic
Hello. I have ran into a very strange problem that I have never seen before. I have a 96 deville I am working on that is a no spark situation with no codes present and no cranking rpm on scantool. If I unplug either crankshaft sensor the car will have a long crank but will start and run. Both crank sensors are 1140 ohms. Wiring to them from module is good and not shorted. Cam sensor is also in spects. I have looked in the crank sensor holes with a mirror and reluctor looks to be ok. The module has been changed with a known good one. All six wires from pcm to module also are good No shorts to ground or voltage. Pcm is also substitured with a known good one I have the most recent update flashed to it. I did ac voltage checks at the module plug with car idling on each open sensor. Crankshaft sensor a reads 5.1 volts when car is running and sensor b around 7 using a fluke 87 meter. I had two more cranks sensors on hand and tried them. Same results. Seems like a crank sensor sync problem of some kind. I have disconnect cam sensor with both cranksensors plugged in and no cranking rpm or spark. Has anyone ran into this? Seems very odd. Almost like the reluctor is a problem but I don't see how when it will start with either crank sensor just not both. Hope someone can give me a direction.
have the same problem?
Friday, August 7th, 2009 AT 9:04 PM