7mgte stumble HELP

[ccguy]

with a stethoscope on the injectors i can hear them firing at a nice even pace at idle and with slight increasing throttle they increase the ticking accordingly. just as it begins to stumble the ticking slows WAY down and becomes slower than when the motor is at idle when the stumble starts and continues.
if i rev it above the stumble they are ticking super fast (as they should be at high rpm)
so i am going to look back into reasons why the ecu reduces injector duration....like the main sending units-- afm/air temp, knocks, ect, cps,_____????
i think now i should be looking more at reasons for the ecu to cut injector duration vs the ign timing

[cre]

Have I mentioned before that your car makes me feel like a basket case?

[ccguy]

yea this motor makes me feel like a jackass. i am loosing my mind. out of all the motor swaps i have done and this is the first one i did to my own vehicle and it does not run, WTF. i feel like screaming every time i think about this motor.
i am going seriously insane.......

[cre]

Are you still running the same wire harness you started with? It was shortened right?

[ccguy]

yes same harness. the o2 sensor shielded wire was grounded from the inner wire to the shielded outer wire. in fixed the short and it tested ok.
i tested all of the other wire for continuity and all is good. i hope to look some more at it this weekend.....any specific places anyone thinks i should investigate?
i am going to replace the cps plug with a new weather pack plugs.

[cre]

Okay, and I can't find mention of it in the thread, did you try another ECU? I'd be inclined to try another harness and ECU despite test previous results.

[ccguy]

yes i have 2 computers. it does the same thing with both.
i would love to try another harness but i need to find one first.
today i cut off the cps plugs to put on the new weather pack ones and the wires on the harness side all have corrosion (green crap) inside of them under the insulation. i was unable to install the other side of the new plug due to i grabbed the wrong harness prongs. so Tuesday hopefully will have them on.

[ccguy]

still no difference with the new plug on the cps....
does this make sense to anyone else...if the wires are corroded the ecu would might not be getting the correct number of pulses from the cps causing the ecu to cut injector pulse?
i wish i could find out what the ecu is seeing.

[cre]

I thought the ECU monitors three signals as a part of the equation you're talking about: IGt, IGf and IG- Unless they're all screwing up in harmony a code is bound to show up.... I could be wrong completely wrong though, I haven't had the pleasure of working with a TCCS where simply swapping out components as a last ditch effort didn't cure it. I would replace the wires along with the connectors. Corroded wire has a higher resistance too.