I?m running into a weird issue where my E38 ECM will only allow roughly 50% throttle after hitting the rev limiter on my LS7. You can see from the log that the first pull is normal and pulls strong all the way to the rev limiter at 7,200. After that, the car runs and drives fine but will only allow up to about 50% throttle. The next pull on the log file is with my foot to the floor (which can be seen by throttle pedal voltage) but only a commanded 45-50ish percent throttle and won?t go into power enrichment. After I cycle the key, it?s back to normal. I did check to see if it threw any codes and only got a permanent P0503 code for speed sensor ? Intermittent/Erratic/High.
Any idea what might be the root cause of the computer limiting throttle?
I had recently changed injectors to 54lb flex fuel L94 injectors with a ZL1 pump because my previous injectors did not have correct data. It definitely looks like I?m running out of fuel by 6,000RPM. I realize that needs to be addressed, but not sure if it?s related to the limited throttle issue.
The engine has heads/cam (naturally aspirated) and makes about 620HP to the wheels and is swapped into a 69 Camaro. I used an E38 ECM from a 2015 Z28 Camaro with a ZL1 FPCM and pump. Let me know if you need any more info.
Log and tune attached.
Ryans Camaro 4-13-22.hpl
Ryan's Camaro V48.hpt