QuestionAnswer: I don't have personal experience with your particular vehicle, but the rpm gauge does depend upon the crank sensor signal to be good and in most vehicles there is a sign of life on the rpm gauge while cranking. Are you getting the 12 pulses per revolution when you read between the signal and the ground wires and rotate the engine by hand and with the key in the run position, of course?
Roland
Question:
-Roland
I'm getting all 12 crank signals now, but they are very finicky to show up on the voltmeter (I have to be within a degree or so, and with the plugs in it's difficult to get that fine of movement).
The voltage varies from 4.98V to 0.02V.
If it is an ecm problem, is there a way I can open it up? I'm familiar with repairing pc computer/gaming consoles by reheating/soldering.
AnswerHi Shawn,
The slots are small so that is why the pulses are quick (small angular displacement). I would expect the drop would be to about 0.3 rather than 0.02 but I can't say that would cause a no start. Are you getting spark? What about fresh codes? There is a code for a defective PCM (53).
These units are sealed "potted" for environmental protection so it may not be easy to repair it yourself.
Roland
