Jumped the gun still having stumbling issues

[-=Jeff=-]

Originally Posted by XfireZ51

Jeff,

Sounds likke you still need to fix that open ground regardless. I would fix that first before installing new ECM and see what happens. Is the O2 ground tied into an ECM ground by any chance?

I have a fix to test on Sat. not going to try tonight or have time tomorrow

no o2 Ground is its own ground..

[bobbyhi]

Originally Posted by XfireZ51

bobby,

So you finally got a cam sensor code?

Yes, a code did come up. I was at Doug Rippie's place when the code occured. Doug did not give me a code # but said it was the cam sensor fault.

[XfireZ51]

Jeff,

Have you thought of looking at the ECM grounds? Odd that O2 sensor ground would be bad.

[-=Jeff=-]

Originally Posted by XfireZ51

Jeff,

Have you thought of looking at the ECM grounds? Odd that O2 sensor ground would be bad.

it is not the sensor ground directly.. if you look in the Service manual there is a Ground out of the ECM for the sensor circuit.. I found the ground location, everything is connected, I also found what else goes to that same point. so far everything that goes to that ground point works.. Now that is not to say that the wire is bad, but the is a (S) connection (short) where both ECM O2 Circuit Grounds tie together and then go to the ground point. It is possible, that the leg going to the grounding point broke away at the short.

One step at a time.. going to check this fix this weekend. see if I got anywhere. then move on to the next issue

[-=Jeff=-]

Originally Posted by XfireZ51

Diff MAP registers a constant .6 volts but when he stabs the pedal,voltage goes up and Scdys Open.

I looked at this in the manual, I need to read through it again, but that voltage appears to be correct..

[XfireZ51]

Originally Posted by -=Jeff=-

it is not the sensor ground directly.. if you look in the Service manual there is a Ground out of the ECM for the sensor circuit.. I found the ground location, everything is connected, I also found what else goes to that same point. so far everything that goes to that ground point works.. Now that is not to say that the wire is bad, but the is a (S) connection (short) where both ECM O2 Circuit Grounds tie together and then go to the ground point. It is possible, that the leg going to the grounding point broke away at the short.

One step at a time.. going to check this fix this weekend. see if I got anywhere. then move on to the next issue

So IOW,you'll check to see if fixing the O2 ground issue is the culprit before swapping ECMs? Also, the Diff MAP sensor readings in the scan were strange. Any chance similar issue is going on there and would the two be related?

[-=Jeff=-]

Originally Posted by XfireZ51

So IOW,you'll check to see if fixing the O2 ground issue is the culprit before swapping ECMs?

Yes.. check that first

Originally Posted by XfireZ51

Also, the Diff MAP sensor readings in the scan were strange. Any chance similar issue is going on there and would the two be related?

how are they strange?

Again, from what I read in the Service manual they seem to be fine.

[XfireZ51]

Originally Posted by -=Jeff=-

Yes.. check that first

how are they strange?

Again, from what I read in the Service manual they seem to be fine.

I re-read the manual just now. Looks right. See you later next week. Keep me posted.

[-=Jeff=-]

Update..

Injectors are FINE, Coils FINE..

I am working out a coupe things and don't want to speak too soon, but I thank I might almost have the issue resolved

[XfireZ51]

I'm on pins and needles!