G8 gt dod
- Thread starter svtserpent
- Start date
svtserpent
Club Member
I checked and double checked grounds made sure everything was plugged in.
Any help would be great thank you!
Any help would be great thank you!
mustangmike6996
Club Member
By chance is a fuse blown,does the OBD II DLC have 12VDC when measuring between pins 4 (Gnd) and 16 (VBatt+)?
svtserpent
Club Member
Im in Shelby twp 25 & shelby. I've been in the automotive industry for 20+ years, the first thing I checked was fuses and grounds. The two grounds I unhooked I made sure I put back in place. FML
adidasvette16
Forum Member
A guy I work with just did this same job on his Charger. I'll ask him tomorrow and see what he says. Did you delete the DOD?
svtserpent
Club Member
Yes DoD delete. I think I'm just going to drag it to a shop.
WhiteHawk
Club Member
Sorry it took me so long. The ground for the ECM is on the front of the right cylinder head. I would pull it off, clean it, and verify that there is not a break in it up to the ECM. Can you confirm that the ECM is getting power and ground? The service manual isn't much help past that. It assumes that the ECM is working for most of the diagnostics. I am not sure how you would check for a bad ECM without having an extra one to swap in and out.
My educated guess (not a tech) is that either you are not getting power and ground to it, or it is fried. I would check every connector you disconnected between the ground and ECM and make sure the pins aren't bent, corroded, or pushed into the harness. If you actually unplugged the ECM as part of the swap, go through the connectors with a magnifying glass looking for an issue.
The problem almost has to be in that ECM power circuit though, or the ECM itself.
-Geoff
My educated guess (not a tech) is that either you are not getting power and ground to it, or it is fried. I would check every connector you disconnected between the ground and ECM and make sure the pins aren't bent, corroded, or pushed into the harness. If you actually unplugged the ECM as part of the swap, go through the connectors with a magnifying glass looking for an issue.
The problem almost has to be in that ECM power circuit though, or the ECM itself.
-Geoff
svtserpent
Club Member
Thanks for all the help guys, I'm actually getting the use of a GM tech II held held programer tonight. I hope I can fumble through it lol.
svtserpent
Club Member
Long story short, took out the ecu to order a new one, then I thought lets try one more time put it back in and found a bunch of codes. I dont know what I did different but I was now able to talk to the ecu.....
Blew all the theft & dtc codes then it started !
Blew all the theft & dtc codes then it started !
Nice!!
svtserpent
Club Member
lol smack it on the table and blow on it..
svtserpent
Club Member
Dropped it off with Lidio, got a call from him today saying it tuned really nice and idles nice with the big cam.
Just wanted to say thanks for the all the help and recommendations.
Dave
Just wanted to say thanks for the all the help and recommendations.
Dave