While i was doing the IAC valve test on my LS, which says to hold the RPM at 3000 until the fans kick on then let idle, unplug and check if idle drops, which it died instantly. anyway, while i was holding the RPM at 3000 the engine sounded like it was missing during the whole time i was holding it there. is this normal due to no load on the motor or is there possibly a problem with that?
My mods consist of I/H/E, Pulleys, and the timing has been messed with a little.
Any suggestions?
TIA