Evo 9 AC on deceleration idle and stall issue
Aug 16, 2015, 11:31 PM
#1
Evo 9 AC on deceleration idle and stall issue
I need some help from the community. I am at a lost on how to fix this issue.
When I slow down towards a light, with the AC on and clutch depressed, the car's idle would bounce between 500-1500rpm. The AFR's bounces as well from 13 to 21. Sometimes the car would even stall. It 's super scary when this happens because pretty much I'm driving the car without power steering or brakes. I would have to quickly start the car again.
A little background on the car, I am on speed density, 270 cams, and all other bolt-ons.
Video of irregular idle with AC on while slowing down towards a light:
When I slow down towards a light, with the AC on and clutch depressed, the car's idle would bounce between 500-1500rpm. The AFR's bounces as well from 13 to 21. Sometimes the car would even stall. It 's super scary when this happens because pretty much I'm driving the car without power steering or brakes. I would have to quickly start the car again.
A little background on the car, I am on speed density, 270 cams, and all other bolt-ons.
Video of irregular idle with AC on while slowing down towards a light:
Last edited by guyver858; Aug 16, 2015 at 11:34 PM.
Aug 17, 2015, 05:47 AM
#2
You may have to play with your iacv tables if you have ecuflash or bump up your idle with ac on. Looks like the car is surging from your video. I had this issue after a cam install and once I bumped up the values a tad and set the idle with AC on to about 1100 rpms everything was corrected.
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