Super weird high idle issue ka24de - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

rv_zenki · 03-17-2020, 04:14 PM

So I've been fighting a high idle issue for a while now. The car is a 96 s14 with a ka. When I first start the car it will idle around 2k for a couple seconds, drop down to around 1100 for a few seconds, then climb back to 2k and hold steady. Once the car warms up the idle will drop down to around 900 then immediately surge back to 2k.

I have a brand new iacv and smoke tested the car. I also replaced the pcv valve. The tps ohms are where they should be. I unplugged the maf while the car was running and it started idling like crap. I have a Bluetooth obd scanner and it shows the coolant and air temp sensors are fine.

I tried adjusting timing however when I unplug the tps the idle goes to about 2.8k-2.9k. I am worried this is messing with the timing.

I'm really running out of ideas here so any help would be greatly appreciated.

03-17-2020, 04:14 PM	#1
rv_zenki Leaky Injector Join Date: Sep 2013 Location: Kalamazoo, Michigan Posts: 127 Trader Rating: (0) Feedback Score: 0 reviews	Super weird high idle issue ka24de So I've been fighting a high idle issue for a while now. The car is a 96 s14 with a ka. When I first start the car it will idle around 2k for a couple seconds, drop down to around 1100 for a few seconds, then climb back to 2k and hold steady. Once the car warms up the idle will drop down to around 900 then immediately surge back to 2k. I have a brand new iacv and smoke tested the car. I also replaced the pcv valve. The tps ohms are where they should be. I unplugged the maf while the car was running and it started idling like crap. I have a Bluetooth obd scanner and it shows the coolant and air temp sensors are fine. I tried adjusting timing however when I unplug the tps the idle goes to about 2.8k-2.9k. I am worried this is messing with the timing. I'm really running out of ideas here so any help would be greatly appreciated.