Hi Guys,
So I'm at the end of my build now and it's time to get serious about getting the ECM into shape. I have an L92 Gen IV engine out of an '07 Escalade with an LS376 cam swapped in and VVT delete. The ECM is out of an '07 Avalanche and is an E38. I have copied over most of the tune from an '08 Corvette to get a baseline for this tune and configured the car to run in speed density for the initial tuning; BTW the car won't stay running if the MAF is enabled. I rebuilt the wiring harness myself for this project and for all intents and purposes the car is running very well. I have a couple issues that I would appreciate some direction on if anyone has time.
1) There is an issue with the car coming to idle after depressing the clutch and shifting to neutral. Sometimes the car will die, sometimes it stutters, and other times it comes down to idle just fine. It usually seems to be worse once the car has warmed up and if the car is reved higher when it comes down to idle
2) Occasionally the computer will throw a P0606 DTC. This almost always happens when doing a big pull in first. The throttle then becomes unresponsive until I clear all the error codes. Other than that, I won't see this issue.
3) The car seems to be guzzling gas. I setup a MPG PID on my histograms to track it on one of my last scans and it does seem to be significantly lower than I would expect.
Attached are a couple of scans and the tune I am currently working with. I have been using the LTFT+STFT histogram to start making changes to the VVE. Any and all help is appreciated.
Thanks!