Rough idle and engine shake at 2000 RPM
I have a 5 speed, 99 gt w/ stock fuel system.
The car idles at 700+ RPM, it kicks this up and down most likely due to the smog control.
At 2000 RPM, the engine shakes really bad, can even feel it when running at 65mph. the shaking stops at around 2500 RPM.
Anyone experienced this?
Could it be a faulty fuel injector or maybe a coil pack?
Any help would be appreciated.
Black 99 GT
-- Current Mods: FIPK, C&L Plenum, 70mm FRPP Throttle Body, Steeda Triax Shifter, BBK Upper and Lower control arms.
-- Dyno @ 2500ft in elevation on a DynoJet 233.2 hp and 273.8 Torque
-- Future Mods: 4:10 Gears, Exhaust, Super
-- Current best time with only FIPK and pinging like an sob:
1/4 mile, Reaction - .139, 60ft - 2.284, ET 14.316, MPH - 98.278