Ka24de high idle help

[8Nismo9]

My 96 s14 with a 5 speed swap idles at 1400 and almost 2000 when the AC is on.i have replaced the IACV and put a new distributor in it.one thing I did notice is when I disconnect the throttle position sensor harness an plug it back on with the car on the idle goes back to normal

[8Nismo9]

anyone got anything?

[8Nismo9]

someone chime in

[ozzie7799]

I had a similar problem after I replaced the water pump of my car, which was weird. I tried to research the problem here, but didn't find much. When in park, I would hit the brake pedal repeatedly and I noticed the idle climb to nearly 2000 rpms. I checked my throttle position sensor harness and coolant temperature sensor harness and I noticed if I moved the wires, the rpms would drop back to normal. My KA24DE idles fine now, but I had that problem for a few months. A few weeks ago, it just went away and I haven't had the problem since.

Truthfully I don't know exactly what the problem was, but my best guess is the wiring on the throttle position sensor harness connectors. Just trying to help you out so you narrow down your issue.

[Memberofthe600hpkaclub]

Im having the same issue...changed literally everything...entire im all harness no...even changed everything to obd1 im harness coolant temp o2 etc...same exact problem

[idlafie]

Is the ECU kicking out a code?? If so, which one, (s)??.

Ozzie may be correct in his guess of the throttle position sensor wiring harness. They don't last forever ya know.....They will go bad eventually. I learned this while fixing wiring harnesses for my friends.

ID