Quote:
Originally Posted by WVZR-1
The PCM in the image is a '94 - '95 MY only reprogrammable original to the LT1
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Correct there Dave - you know your vette mills

; the old snappic was a '94 I did top end housecleaning a few years ago - just posted it to show ECM / PCM backprobe.
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But now on vac test - everything plugged in dry, turned the key on, both fuel pump fuses pulled, and the secondary vacuum pump didn't come on.
Quote:
With all vacuum lines connected, turn key on and listen for vacuum pump to shut off. If it does not shut off, start at the closest vacuum line to the vacuum pump disconnecting the line and holding your finger over the end. If the pump shuts off the leak is on other side of that. Go to next fitting and do the same until you are past the leak wherein the vacuum pump will NOT shut off. You have now located the leak.
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Which connector did I miss here?
I still have some vac lines un-hooked as well - any of them necessary before sec vac pump trips on?