A/C Idle Issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

*fliprayzin240sx* · 07-23-2008, 08:51 PM

I just got my car back for some reason when I turn the AC on, my car would stall. If I remember right, most cars has something that tells the ECU to bump up the idle when the AC compressor is turned on. How does this work on a our car? Im trying to get an idea where and what to check first to alleviate this issue.

Sileighty_85 · 07-24-2008, 07:18 AM

It should be within the ECU, my PFC has the the feature of Adj. the Idle RPM's when the A/C is turned on.

Mine always bogged (stock ECU) I thought about maybe Adj the throttle body cable or the IACV a smidge cuz its annoying coming to a stop and the Idle bogging so much.

*fliprayzin240sx* · 07-24-2008, 07:36 AM

Quote:

Originally Posted by Sileighty_85

It should be within the ECU, my PFC has the the feature of Adj. the Idle RPM's when the A/C is turned on.

Mine always bogged (stock ECU) I thought about maybe Adj the throttle body cable or the IACV a smidge cuz its annoying coming to a stop and the Idle bogging so much.

What do you have yours set at? Imma have to try to find it in my commander, i keep forgetting to get with somebody to see how to change the damn language on it to english from japanese...

0wn3r · 07-24-2008, 07:42 AM

My SR started doing this too when in neutral or when the clutch is engaged...but it seems like the problem has developed into stalling even when the A/C ISN'T on. It's almost like the ECU is delayed with talking to the IACV, but now I'm thinking it's possibly another problem on top of that.

FYI- I'm using the KA's A/C parts.

Sileighty_85 · 07-24-2008, 07:43 AM

man its been awhile since Ive messed with it,
I know the stock setting is 1000RPMs which should be enough could be something as small as a vacuum leak causing it to stall.

maybe tinker with your Throttle cable adj (close it more if not already)

ROIDMONKEY · 07-24-2008, 08:13 AM

welcome to the PFC world. they all at some point do that shit. no more pfc for me . but yes its a tunning problem on the PFC.

*fliprayzin240sx* · 07-25-2008, 11:21 AM

K, I found the setting and bumped the AC idle to max 1200 rpm...didnt do jack shit. As far as the problem, its not something that just happend out of the blue. I had the car retuned after swapping an engine in. The catch is, this engine has a fully built Tomei head with solid lifters and Tomei 270 12.5 lift cams, so the idle is lopey as fuck. My idle is all over the place as it is...

SoSideways · 07-25-2008, 11:50 AM

Perhaps you should check the IACV to make sure it's clean? It can get dirty and stop working properly over time. You may not be affected by it that bad when the car was stockish, but now w/ those huge cams, it probably reared its ugly head.

Sileighty_85 · 07-25-2008, 12:24 PM

Quote:

Originally Posted by SoSideways

Perhaps you should check the IACV to make sure it's clean? It can get dirty and stop working properly over time. You may not be affected by it that bad when the car was stockish, but now w/ those huge cams, it probably reared its ugly head.

270's are sick

does it only stall when you kick the A/C on or Any time the A/C is on?
you might have to raise the Idle in general, the Idle "kick up" is really slow as i had noticed with the PFC

With those cams you might only be able to Use it when cruzin lol

*fliprayzin240sx* · 07-26-2008, 07:10 AM

Quote:

Originally Posted by Sileighty_85

270's are sick

does it only stall when you kick the A/C on or Any time the A/C is on?
you might have to raise the Idle in general, the Idle "kick up" is really slow as i had noticed with the PFC

With those cams you might only be able to Use it when cruzin lol

Pretty much, coming to a stop with the AC on, the engine will stall out. I either have to turn it off or heel toe it to the stone and ride the gas a bit.

As far as the AICV, pretty much ripped it off, cleaned it and even managed to bore it out to let it suck more air in, didnt do jack shit...

louisdaboois · 07-26-2008, 07:17 AM

Quote:

Originally Posted by fliprayzin240sx

Pretty much, coming to a stop with the AC on, the engine will stall out. I either have to turn it off or heel toe it to the stone and ride the gas a bit.

As far as the AICV, pretty much ripped it off, cleaned it and even managed to bore it out to let it suck more air in, didnt do jack shit...

damn dude, honestly im in the same boat and tried everything under the sun and nothing's been a permenant solution. with the ac on I just heal toe to keep the idle up. just to make you feel better, you're not alone bro.

btw. youre the only person i know that's bored out an IACV LOL. jesus chirst, thats awesome.

SoSideways · 07-27-2008, 11:43 AM

Maybe try opening up the TB a little more via the throttle butterfly adjustment screw?

BigVinnie · 07-27-2008, 01:26 PM

If the clutch on the a/c compressor took a crap then it will bogg at idle all the time. I just recently tried using my a/c and when the compressor would kick in the idle would fluctuate and usually bog.
Right now I'm looking for a new compressor.

07-23-2008, 08:51 PM	#1
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	A/C Idle Issue I just got my car back for some reason when I turn the AC on, my car would stall. If I remember right, most cars has something that tells the ECU to bump up the idle when the AC compressor is turned on. How does this work on a our car? Im trying to get an idea where and what to check first to alleviate this issue. __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

07-24-2008, 07:18 AM	#2
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	It should be within the ECU, my PFC has the the feature of Adj. the Idle RPM's when the A/C is turned on. Mine always bogged (stock ECU) I thought about maybe Adj the throttle body cable or the IACV a smidge cuz its annoying coming to a stop and the Idle bogging so much. __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-24-2008, 07:42 AM	#4
0wn3r Zilvia Addict Join Date: Oct 2007 Location: CT Posts: 676 Trader Rating: (4) Feedback Score: 4 reviews	My SR started doing this too when in neutral or when the clutch is engaged...but it seems like the problem has developed into stalling even when the A/C ISN'T on. It's almost like the ECU is delayed with talking to the IACV, but now I'm thinking it's possibly another problem on top of that. FYI- I'm using the KA's A/C parts. __________________ 97 240sx se

07-24-2008, 07:43 AM	#5
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	man its been awhile since Ive messed with it, I know the stock setting is 1000RPMs which should be enough could be something as small as a vacuum leak causing it to stall. maybe tinker with your Throttle cable adj (close it more if not already) __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-24-2008, 08:13 AM	#6
ROIDMONKEY Nissanaholic! Join Date: Jul 2007 Location: HollyFLORIDA Posts: 2,027 Trader Rating: (4) Rides Gallery: ROIDMONKEY Feedback Score: 4 reviews	welcome to the PFC world. they all at some point do that shit. no more pfc for me . but yes its a tunning problem on the PFC. __________________ TRUE thing: True ////OFFSET\\\\ is acheived without spacers Running on E85 570whp Precision 5862....laggy as fuck. hate it

07-25-2008, 11:21 AM	#7
fliprayzin240sx Man w/ CTSV & a Car Seat Join Date: Aug 2002 Location: Tampa Posts: 17,998 Trader Rating: (19) Rides Gallery: fliprayzin240sx Feedback Score: 19 reviews	K, I found the setting and bumped the AC idle to max 1200 rpm...didnt do jack shit. As far as the problem, its not something that just happend out of the blue. I had the car retuned after swapping an engine in. The catch is, this engine has a fully built Tomei head with solid lifters and Tomei 270 12.5 lift cams, so the idle is lopey as fuck. My idle is all over the place as it is... __________________ If you think Zilvia has too many assholes... CLICK HERE!!!

07-25-2008, 11:50 AM	#8
SoSideways Post Whore! Join Date: Apr 2003 Location: 你老母 Posts: 4,371 Trader Rating: (4) Feedback Score: 4 reviews	Perhaps you should check the IACV to make sure it's clean? It can get dirty and stop working properly over time. You may not be affected by it that bad when the car was stockish, but now w/ those huge cams, it probably reared its ugly head.

07-27-2008, 11:43 AM	#12
SoSideways Post Whore! Join Date: Apr 2003 Location: 你老母 Posts: 4,371 Trader Rating: (4) Feedback Score: 4 reviews	Maybe try opening up the TB a little more via the throttle butterfly adjustment screw?

07-27-2008, 01:26 PM	#13
BigVinnie Zilvia FREAK! Join Date: Apr 2003 Location: Walnut Crizzle, Crackifornia Age: 46 Posts: 1,266 Trader Rating: (0) Rides Gallery: BigVinnie Feedback Score: 0 reviews	If the clutch on the a/c compressor took a crap then it will bogg at idle all the time. I just recently tried using my a/c and when the compressor would kick in the idle would fluctuate and usually bog. Right now I'm looking for a new compressor. __________________