S14 KA24DE High Idle - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

koukizhang · 06-18-2014, 02:49 PM

Hi I'm kind of new to this and am not very mechanically familiar. I have a 1995 240sx s14 with a rebuilt ka24de that idles around 2000 - 3000 rpm's. I'm not sure if it's a vacuum leak or I need to adjust the IACV, but I need some suggestions to where I should start. Thanks

koukizhang · 06-23-2014, 03:59 PM

so... no one has any ideas???

cotbu · 06-23-2014, 07:38 PM

High uncontrollable idle, adjusting the idle air control valve has no effect on idle.
Usually a person didn't connect the coolant lines to the iacv, or vacuum leak(big for 2-3krpm) or it could be the TPS closed voltage is wrong.

koukizhang · 06-24-2014, 12:40 PM

I'll check the coolant lines and TPS fist then, thanks

goldens14 · 06-27-2014, 08:44 AM

And have you adjusted your idle down, there's a Philips head slot you can twist thay will adjust the idle its on the passenger side (on the firewall side of the intake manifold)

trikk · 12-07-2014, 06:36 PM

did you get it fixed?

koukizhang · 12-08-2014, 09:18 PM

Yeah. I adjusted the idle down, bought a new maf sensor, and fixed a small vacuum leak. Not sure which one did the trick but she idles perfectly now.

06-18-2014, 02:49 PM	#1
koukizhang Zilvia Member Join Date: Jun 2014 Location: AZ Posts: 296 Trader Rating: (0) Feedback Score: 0 reviews	S14 KA24DE High Idle Hi I'm kind of new to this and am not very mechanically familiar. I have a 1995 240sx s14 with a rebuilt ka24de that idles around 2000 - 3000 rpm's. I'm not sure if it's a vacuum leak or I need to adjust the IACV, but I need some suggestions to where I should start. Thanks

06-23-2014, 07:38 PM	#3
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	High uncontrollable idle, adjusting the idle air control valve has no effect on idle. Usually a person didn't connect the coolant lines to the iacv, or vacuum leak(big for 2-3krpm) or it could be the TPS closed voltage is wrong. __________________ LoverTechnologies "Half Broken Things!"

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06-23-2014, 03:59 PM	#2
koukizhang Zilvia Member Join Date: Jun 2014 Location: AZ Posts: 296 Trader Rating: (0) Feedback Score: 0 reviews	so... no one has any ideas???

06-24-2014, 12:40 PM	#4
koukizhang Zilvia Member Join Date: Jun 2014 Location: AZ Posts: 296 Trader Rating: (0) Feedback Score: 0 reviews	I'll check the coolant lines and TPS fist then, thanks

06-27-2014, 08:44 AM	#5
goldens14 Leaky Injector Join Date: Feb 2013 Location: San Diego Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	And have you adjusted your idle down, there's a Philips head slot you can twist thay will adjust the idle its on the passenger side (on the firewall side of the intake manifold)

12-07-2014, 06:36 PM	#6
trikk Zilvia Junkie Join Date: Oct 2005 Location: Farmingdale, New York Age: 36 Posts: 418 Trader Rating: (19) Feedback Score: 19 reviews	did you get it fixed?

12-08-2014, 09:18 PM	#7
koukizhang Zilvia Member Join Date: Jun 2014 Location: AZ Posts: 296 Trader Rating: (0) Feedback Score: 0 reviews	Yeah. I adjusted the idle down, bought a new maf sensor, and fixed a small vacuum leak. Not sure which one did the trick but she idles perfectly now.