MX-3.com

Alright i figured since i cant work a few bugs out of the car i would post up here see if you guys have any input i have a 92 MX3 with a 94 KLDE from a MX6 it runs great however theres a few small bugs first off heres what is done to it.

HEI Mod with External Coil
Cold air Intake
Magnaflow resonater with Pacesetter exhaust
Intake manifold gasket done
Valve cover gasket done
Coolant Bypass Mod
Brand new Denso 02 Sensor's
Brand new Temp sensor for Gauge
Innovative wideband 02
Plugged all open Vaccuum Lines, No vaccuum leaks

Here is the issue i am having when it idles it will idle around 1500, i set the idle in diagnostic mode and the idle screw is all the way down it idles fine in diag mode as son as i take it out of that it jumps right up. It also seems to run kinda lean when im driving the wideband is around 14.8-15.2 which is ok but on WOT it runs around 13.8-14.2 which is kinda lean i think. any ides how i can fix the high idle and the running lean? it had a high idle before i did the coolant bypass mod too so im not sure whats causing it if i turn the AC on or the headlights or the blower motor the idles kicks up to around 2K.

Thanks guys!!

Hmm idle screw is normally around 3 - 3.5 turns out. We are talking about the screw on the top of the throttle body right? The allen key one at the bottom of the TB is factory set and shouldn't be touched. Lots of topics on this problem that's for sure.

Cleaned throttle body? you could just be getting stuck open. i had this same issue, screw all the way down and my lowest rpm was 1100 when out of diagnostic mode. i took off my throttle body and cleaned the eff out of it but i still need the screw all the way down but it idles perfect now. 750. no coolant delete. warm up mode thing still plugged in.