Quote:
Originally Posted by dondon
Hi
I think I've diagnosed a future ECM rebuild in my future, however I decided I wanted to put the plenum back on, make sure the car is running as it was before then send the ECM away.
Well after putting the plenum back on (this is #2 for me - 1st one solo) the vehicle cranks, but does not start. While I didn't check the actual fuel pressure, on touching the shrader valve, lots of gas was available. So I'd like to think that isn't an issue, I then made the room dark, hooked a spark plug to #1 observed no spark. I also somewhere in that sequence observed the RPM while cranking on a Tech 1 and it showed 0 RPM.
My gut says 1 of the 4 connectors under the plenum to the DIS is not seated correctly, however the back 2 (observable with a camera phone and MAP sensor removed) appear in good shape. I saw some discussion about accidentally unhooking the coil connectors when plugging in the DIS connector... If they are the two observable from just behind the fuel pressure regulator then they appear pretty tight as well. I was also able to remove the DIS connector and take some photos to verify the pins looking in good shape.
Any thoughts on what idiotic thing I forgot when reassembling or where to check or should I just pull the plenum again and hope to observe something amiss?
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If no spark, then ignition module must not be firing coils. Undo the plenum and yes check the harness connectors. Make sure crank sensor is plugged all the way into DIS. No need to disconnect ignition housing connectors at back of coil packs, just the 4 connectors on Ignition module itself.