That's some crazy routing for an lly pipe. You can order a trim to fit 90 sweep coupling from a few suppliers. Racepartsolutions.com or Vibrant would be my first 2 choices.
Sounds like a cross leak from exhaust to intake to me. Every time I've torn down an engine with that going on, it's had either bent pushrods, or bent valve, or leaking seat, or broken rocker/bridge, or all of the above.
I received a response back from Paul again, saying they have absolutely no idea why changing that APP parameter value is causing an issue. My best guess is that it is changing the engine cal ID checksum to one that is unrecognizable, because when the corrupted file is installed, no tools I have...
I narrowed it down today to an issue with their address for the APP expected voltage. Once in a great while, I was able to change the values and get the flash to fully take. Success rate was 2/12. Most times that I tried to recover the ecm with a stock file flash afterwards with EFILive, I was...
Update:
Dealing with Paul at EFILive on this issue has been frustrating to say the least. They have not been able to provide any answers as to why the modified file is still reporting codes that Editor is showing are "not reported." I have provided multiple trace files of flashes and reads and...
I personally never had a problem with copper on anything exhaust related, however, I did prefer aluminum-based antisieze in high-heat industrial processes, from constant 600deg-2200deg applications for hundreds or thousands of hours between cycles, the copper based product would solidify/bake...
Are you in PA still?If so, I'll stop and help you get the manifold off tomorrow on my way home without pulling the motor, unless you WANT to pull the motor...then I'll help with that too. I'm heading home from WV
The first module in the HS Canbus branch to to the TCCM and a few other modules is the VCCM, which is the module Jason is talking about. It is a common failure point on gmt900 chassis. I don't think you'll find a new one in stock anywhere, so if you find that to be your issue, or one of them...