I'm trying to figure out why the spark advance won't change when i rev the engine. I have done the l28et swap before but didn't have this problem. I searched and tried a lot of the things in a previous post i found but still no change.
I swapped 3 other ecus, changed coil and igniter, took the dizzy off my other car but i didn't get a spark for some reason with that one, TPS sensor works, injectors cycle faster as the rpms climb, checked all grounds.
Can anyone think of any other possible causes of this? How much authority does the AFM play in controlling the spark under no load?
The car starts on first crank every time and idles and revs fine, just no spark advance or retard.....