Hey everyone, i'm new to this forum but i've read great stuff from all you guys i hope you can help.
First of all i have a 98% stock 98 GTP with 185k i've replaced the crankshaft sensor, MAF,Plugs and wires, K&N air filter, Thermostat, Battery and all the fluids (except the super charger oil, going to do soon).
on start up things go great. It fires up right off and the tach goes up to about 1100 rmps but then it starts to drop very slowly until it reaches about 500-700 rpms then it just sits there ROUGHLY idling. The needle on the tach barely moves up or down but hardly noticeable just bouncing from 600-800 rpms but its almost like the car is shaking slightly. i've been running low octane fuel for about six months but recently switched back to 91 (after reading this forum!).
All symptoms are GONE above 1100 rpms and everything runs great except for my idle, it's awful. i cleaned the sensors on the TB with TB cleaner and replaced the MAF and i don't know where to go next!?
ps. no codes at all cleared them after replacing the MAF and nothing so far.
