Hot weather with A/C, after >30 min run time - can watch (misfire counts on scanner) and feel it start to miss intermittently on #5. Scanner shows pending P0200 at that point. Let it go through a couple key cycles and it becomes a hard code P0200 and misfire is pending P0305. Usually I have been clearing it at that point. Let it get hot enough and will miss consistently at idle on #5. Cold engine or cooler weather never a problem.

Checked injectors with an ohm meter when both cold and hot and really saw nothing unusual with #5. Was well within spec. But decided to switch spider back to my old one (which was known to me as still a good part) as a test to eliminate it as a problem. When going back together I inspected the terminals in the main injector connector and found terminal for blk/white wire for #5 injector pushed up in the connector about 3/16" with the connector in place on the spider. With some difficulty, I pushed it down into place with a small screwdriver.

Took it out and still exactly same problem. I am hoping the wiring harness is FUBARd, since my only other option appears to be the PCM. Something definitely wrong with the terminal for #5 and it is for the missing cylinder. I'm thinking I need to replace it. Anyone have a source or GM part# for these terminals?

 

No one, huh?? Crickets are chirping.

 

I go to my local junkyard for replacement factory wiring and connectors. They cost too much to buy new retail. After all the help you've given here I wish I had a better answer.

 

Thanks Rusty, I just prefer to not splice the wiring if I don't have to. As long as I can find a GM P/N I've had pretty good luck obtaining very small parts by Googling the P/N. I like shopping on-line! Thought someone here might have the P/N handy, with the injector pins always getting bent under this connector.


I'll search some more myself for the P/N

 

Found it on this drawing:
http://www.mouser.com/ds/2/105/dcs_d...083-893027.pdf


Delphi-Packard 12048327


It seems to be made of unobtanium on-line (find listing but no stock anywhere). Maybe can get through GM.

 

If anyone cares, the problem was finally found today to be a wiring harness (including injector wire) melted on the passenger side exhaust manifold check valve. My fault from when I put engine in for not positioning it correctly.

 

Kudos to Flashmasters (Google it) for providing the PCM that I tried during diagnosis. $89.95, free Priority Mail shipping, programmed to my VIN with instructions how to re-program the passlock system to the new PCM. Returning within the 1 month and paying a 20% restock fee. What more could a person ask for?!!!!

 

I'm having code P0200 issues and came across this thread during my research. Found this. Just wanted to make it so someone else would be able to find it if they needed. Will most likely order this myself and post results, as usual.