Quote:
Originally Posted by ROKN69
Thank you, Don. I changed the title of the post from Tach to Crank, thanks for catching that mistake. I changed all the text verbiage from tach to crank and forgot to change the title.
I don't have access to a scope, unfortunately. But, logically speaking, if we have changed ECU's, we've changed the harness wiring, and reverified the harness wiring is OK, then the next step is to change the crank sensor itself (the last piece of the puzzle). I think you meant to use the scope to test the crank sensor, and in my mind it's much easier to just swap in a new crank sensor than to try and test the old one. If I'm missing something here, please let me know.
I appreciate your input and in no way am attempting to shut you down. This is a dialog, and I hope you receive my reply in a positive manner. Thank you.
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I thought you already swapped out the sensor.
I suggested the scope because it is an ideal way to troubleshoot the problem. I am an electronics engineer and we troubleshoot problems like this by observing signal waveforms on an oscilloscope. I am pretty sure your crank sensor waveform has a lousy risetime for some yet unknown reason. One reason is because it may be too hot as suggested a couple of times.
Another idea I had is to get yourself a can of freeze spray and hit the sensor hard with it the next time it happens to see if it goes away briefly.
Don