Mine idles in the 550 range to. It also jumps up and down pretty quickly at the occasional stop light. Fiqure I'll be cleaning the IAC in the spring. Anyways at 550rpm it is a very smooth idle so I suspect that my tach is just off.
Green 96 mystique gs 4cyl mtx
16.9 in the 1/4 mile @102500 miles
95SE in Midnight Red MTX
MSDS headers and y-pipe
SVT exhaust
SVT UIM
Optimized se TB.
Full pre 98 SVT body kit
15.741 @ 87.73mph :)
