What would cause a high idle (2-3k) that drops down to normal if I blip the throttle? Been happening more frequently when I'm at a stop or coasting. It always goes away with a throttle blip. My mileage has also been crappier than usual.

TIA

-marc

Start with checking throttle cable.

Captain Caveman

96 RS Turbo 11.414 @ 119.62 MSNS, Crower 2 NA cams, BW366, 10.5 comp, UDP, 60mm TB, W/A intercooler, 3.55 tranny 567.9whp 430tq
97 RS NA 13.188 @ 103.87 MSnS powered 12.5 comp, Crower 3's and 219.4whp with 175tq
98 RS DD 12.5 comp on stock ECU, LTH, Crower 2's, Koni, GC, Hypercoil, DG hats
99 OZ 5sp Stocker 15.856 @ 85.97
99 GS stocker auto 17.7@77mph!

wiki home page:http://www.2gnt.com/index.php?d=bullettdsm

95 Eclipse GS: 10.5:1, Crower 2's and MSII
186 WHP - 150 WTQ
14.697 @ 93.85 MPH......Gone, but not forgotten
99 420A Avenger: Given to my sister
99 GS OZ: Sold
03 Evo 8: Family Car with balls

Could also be a malfunctioning or dirty IAC. I had a similar issue in the past and after pulling the IAC, thoroughly cleaning it, and reinstalling, the issue was gone.

1999 Eclipse GS
Built motor
Hahn 16G Turbo w/ FMIC
Hahn Stage 5 Portfueler (270's & 500's)
Zeitronix Zt-2 wideband w/ 3.5bar MAP
3" SS Turbo Back
CM Stage 4 Clutch and Fidanza Flywheel
Baer Big Brake Kit

what bullett said. start by adjusting your throttle cable and lubricate the TB anywhere that affects butterfly operation. if that doesnt work, try what jess said

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Outside of Corona: "That sucks, peace out..." (jamie walks away)... "Sweeet, what we doin?" -Zac
Tim's garage (prior to motor install): "Im gonna smoke real quick, that way if you fuck up I am already nicotined up" -Tim

Ive got this same issue but it only happens when my AC is on.

usually a throttle blip or if I wiggle the shifter (my car before i bought it was changed to a manual) solves the issue.

96 gs

I had idle issues after having the block bored out and having the head ported with bigger valves, high flow intake mani and a 60mm TB. No mattter what I tried, the idle would never be as good as it once was stock. Fortunately modernperformance.com sells a manual adjuster that completely replaces the stock Idle air control valve. Its basically an idle screw in a custom billet mount. You unplug the wiring and leave it unplugged and it does not throw a CEL either. I made a youtube video with it on my car showing it idle smooth you can check out here. Hope this helps!