No IACV Sr20det - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Splintercellsz · 05-21-2016, 05:40 AM

I've looked all over and couldn't find a solid answer.

If I unplug the IACV, the car runs prefect; but plugged in, it dies, idles rough, runs lean, etc.
Am I able to leave it unplugged until I can purchase another IACV, or is running without it hooked up detrimental to the engine?

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Primo's Silvia · 05-21-2016, 07:22 AM

Sounds like a short maybe causing the valve to close, or something tricking the ecu

Splintercellsz · 05-21-2016, 07:38 AM

Quote:

Originally Posted by Primo's Silvia

Sounds like a short maybe causing the valve to close, or something tricking the ecu

That's what we thought into we looked at it. The adjust screw was fully backed out, and than stripped.

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Black240Ct · 05-21-2016, 08:04 AM

blocking it off or not running it wont hurt the engine, just have the potential to have a rough start when cold, i deleted mine on my sr

Primo's Silvia · 05-21-2016, 01:01 PM

Sounds like the valve is done for usually when they are backed out all the way, is when it's failing, just get another one

*anti tyler* · 05-21-2016, 03:47 PM

I'm not too keen on the SR engine, however it seems like more of a headache to attempt to run any vehicle without the IACV on.

http://forums.nicoclub.com/running-w...e-t527812.html

Kingtal0n · 05-21-2016, 07:54 PM

just find another used one with a good screw, clean it REALLY WELL, soak that sucker in degreaser and brake cleaner and scrub the insides out until it looks new,

Then bolt it on and re-diagnose. The engine should not run lean when the IACV is there, closed OR open, so that doesnt make any sense at all. It sounds like the air source for the IACV is not hooked into the intercooler plumbing. You have to pass air from the intercooler -> IACV -> engine. You cant just let it suck from the air. The engine has a MAF sensor, so all air MUST pass through the MAF before it gets into the engine. Picture please?

05-21-2016, 05:40 AM	#1
Splintercellsz Leaky Injector Join Date: Apr 2016 Location: Tennessee Posts: 62 Trader Rating: (0) Feedback Score: 0 reviews	No IACV Sr20det I've looked all over and couldn't find a solid answer. If I unplug the IACV, the car runs prefect; but plugged in, it dies, idles rough, runs lean, etc. Am I able to leave it unplugged until I can purchase another IACV, or is running without it hooked up detrimental to the engine? Sent from my SAMSUNG-SM-G870A using Tapatalk

05-21-2016, 07:54 PM	#7
Kingtal0n Post Whore! Join Date: Jul 2005 Location: South Florida Age: 42 Posts: 4,829 Trader Rating: (17) Feedback Score: 17 reviews	just find another used one with a good screw, clean it REALLY WELL, soak that sucker in degreaser and brake cleaner and scrub the insides out until it looks new, Then bolt it on and re-diagnose. The engine should not run lean when the IACV is there, closed OR open, so that doesnt make any sense at all. It sounds like the air source for the IACV is not hooked into the intercooler plumbing. You have to pass air from the intercooler -> IACV -> engine. You cant just let it suck from the air. The engine has a MAF sensor, so all air MUST pass through the MAF before it gets into the engine. Picture please? __________________ 5.3/4l80e/turbo 240sx playthrough: tinyurl.com/4l80er

05-21-2016, 08:04 AM	#4
Black240Ct Zilvia Junkie Join Date: Sep 2003 Location: CT Age: 39 Posts: 562 Trader Rating: (6) Feedback Score: 6 reviews	blocking it off or not running it wont hurt the engine, just have the potential to have a rough start when cold, i deleted mine on my sr