I need help tuning my L92 swapped Envoy.
I found the L92 had DOD lifters (but with a normal valley cover?!?!) so I just switched those with LS7 style lifters, and swapped over the front timing cover & cam sprocket from the 5.3L to the 6.2L to delete the VVT and used the same stock cam.
Now after fitting the L92 in I had a friend interchange some tables in the tune from the file of the vehicle we took the engine from to my Envoy E67 tune file.
Now my main problem is I'm having misfiring at idle and the O2 readings are all over the place and I can smell fuel from the exhaust. So far I've swapped out the coils, plugs, wires and even injectors and still doing the same thing.
Using Launch scanner I can see the misfire is coming from the DOD cylinders. After doing a compression test found the DOD cylinders to be around 50 PSI less than the normal ones. DOD: ~130 PSI non-DOD: ~180 PSI
I need to know what exactly is wrong so I can fix it. If someone more experienced than I am could have a look at the files and tell me where it went wrong I'd appreciate it.
Whenever the misfire is there I'm getting harsh shifting in the transmission as if it's commanding full oil pressure.
Appreciate any help I can get