I tried starting my car today after it had been down without battery power for some weeks. It has been down because I upgraded blower head units from a Novi 1200 to a 1500. This required some different brackets and different air bridge from ECS so I had them send me an LS3 intercooler to throttle body pipe so I could eliminate the MAF housing since I was using the POWRMAF 100mm housing and card style LS3 MAF sensor.
Anyway, I got everything all back together and started it up and it ran like garbage; missing badly and randomly, not being able to maintain a steady RPM and when I gave it throttle it almost dies. The new pipe that that the MAF is in is slightly larger so I tried playing with the MAF tables but it didn't change anything. I switched to VE mode and it got a little better but not much. There was a misfire DTC that I cleared and it has not come back. To me it seems ignition related and I got to thinking that it may need a crank relearn from being without power for so long?
I'm stumped so any unput is appreciated. I know the smart thing to do would be to put the old pipe and MAF housing back in to get it back to how it was but I am not at that point yet.