AC idle issue
Jun 22, 2010, 04:55 PM
#1
AC idle issue
My car dies out when I run the AC. I have my target rpm for AC On 1 and 2 set to 1000 rpm. When I'm driving and press in the clutch the rpms drop down to about 400 rpm and only goes up to about 700 rpm if it doesn't die out. Any ideas what is going on? Is there another setting I need to be messing with?
Thanks
Thanks
Jun 22, 2010, 06:01 PM
#4
It just started out of the blue? Or got progressively worse?
Try increasing timing to 8/9* .
The rpms are not really supposed to drop that low being in drive and coasting. Maybe look at Decel Fuel cut Delay - AC on ..increase values in small increments.
Try doing timing first and then move on.
Try increasing timing to 8/9* .
The rpms are not really supposed to drop that low being in drive and coasting. Maybe look at Decel Fuel cut Delay - AC on ..increase values in small increments.
Try doing timing first and then move on.
Jun 22, 2010, 08:59 PM
#7
It just started out of the blue? Or got progressively worse?
Try increasing timing to 8/9* .
The rpms are not really supposed to drop that low being in drive and coasting. Maybe look at Decel Fuel cut Delay - AC on ..increase values in small increments.
Try doing timing first and then move on.
Try increasing timing to 8/9* .
The rpms are not really supposed to drop that low being in drive and coasting. Maybe look at Decel Fuel cut Delay - AC on ..increase values in small increments.
Try doing timing first and then move on.
Not sure how to do the Kunal. Guess I needto start reading up on it. BTW what is ISC motor, how does that get disabled?
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Jun 22, 2010, 09:16 PM
#8
It could be the biss. Once you locate it, turn it anti clockwise a few turns and go for a run.
What rom version you running?
Jun 22, 2010, 09:44 PM
#10
Your biss screw sits on top of throttle body. It's a phillips head down a shaft. can't see it easily with tb on intake mani... search biss screw on forum and a picture should come up. Biss basically controls the manual aspect of how much much air should pass through the plate at idle etc...If it's set too loose it will cause high idle...too tight, low idle.
It could be the biss. Once you locate it, turn it anti clockwise a few turns and go for a run.
What rom version you running?
It could be the biss. Once you locate it, turn it anti clockwise a few turns and go for a run.
What rom version you running?
Did some reading and will try to turn SAS on tomorrow and calibrate everything. If I really mess up I will defiently get ahold of you
Jun 23, 2010, 06:12 PM
#11
OK, so i tried to mess with my BISS screw today. I enabled SAS mode and adjusted the BISS screw to around 800 rpm like I read on here. Then when I went back to my regular mode, my RPMs were at 1.2k all the time.... I thought that adjusting the screw will get me ack in sync with my ecu settings. Am I missing something here? As of now all my idle setting in ecu are stock.
Jun 23, 2010, 06:49 PM
#13
Well that's where I get confused. So lets take the AC out of the issue right now. My regular idle is set to 800 rpm. So after adjusting the BISS screw in SAS mode to around 800 rpm, my rpm goes up to 1200rpm after SAS is set back to normal. Am I suppose to lower the ECU settings to around 600 (or lower) rpm then? 
Jun 23, 2010, 07:52 PM
#15
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In the idle map (ISCV) intial step postion with ac on, raise the lower part of the map on all three. I had the same problem for a long time and fixed it last week by doing this. I had to raise it quit a bit. from 7 to about 30 or so but every car is different. Is your bov vented to atmospher?