Crank/Cam sensor help
I've owned this car about 8 years. This started happening about 2-3 years ago.
1994 Eagle Vision TSi, 3.5L (24V)
Symptoms: These are both sporadic. Car could go weeks or more between either of them happening.
1) Every once in a while, the engine will jerk violently just for an instant. Feels like it goes a rev or two with no fuel or spark.
2) Also every once in a while, the engine will simply stop running. Electrical power is still available to all systems (lights, dash, radio, etc.). When trying to get it going again (after pulling over), engine/starter crank just fine, but the engine won't start. Eventually, if I keep trying to start it multiple times, it suddenly will start and run normally, as if nothing ever happened...could take minutes, could take an hour. Thankfully the battery is in good shape...
Pulling codes returns 54 - No Cam Signal at PCM. I think at one point I also saw an 11, which is related to the Crank or Cam sensor.
- I have replaced BOTH the Crankshaft and Camshaft Position Sensors.
- I have re-wired the Cam sensor (including the common wires with the Crank sensor), splicing the PCM lines about 2 inches from the PCM plug.
- I have replaced the PCM.
The symptom has not changed for any of my actions...the car runs fine most of the time. Still, every so often, the engine will either jerk, or just quit for a number of minutes, then spontaneously begin running again. Code 54.
Any help or ideas regarding what to check next would be appreciated. The schematic in my Chilton's manual indicates that both of these sensors have a common wire that goes to the transmission control module, but I don't know where that is located and have not been successful at tracing it visually. Could the transmission wiring for the sensor(s) be an issue? Could there be a problem with the cam sprocket?
My next step is to re-wire the rest of the Crank sensor, though I will need to get the tranny wire figured out first.
Last edited by Gusset; 09-21-2009 at 08:11 PM.