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Low Idle then Cuts Out - Caused From?
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Old 30 Sep 2016, 08:22 PM   #1 (permalink)
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Low Idle then Cuts Out - Caused From?

Hi guys, well I'm a newbie to this forum so please be patient.

I have a 1997 JDM WRX Impreza Wagon that has idle issues and could do with any advice you all got:

Car idles fine whilst warming up (actually idles GREAT when still cold I find) will idle @ 850rpm approx. maybe lil higher. When I take her out for a drive, I have no dramas while driving about until ready to come to a stop or roll gradually in neutral. that's when the idle drops to pretty much 0 and if no gas applied will then cut out, and I'll have to turn key to restart. (Which car does)

Took car to a mechanic, who scanned and found x2 faults -
#1 Air Flow Meter
# 2 ISC Valve

So I brought brand new Air Flow and mechanic supplied ISC Valve fitted both & cleared faults from ECU.

Picked up car drove home with no issues, was like a new car ..... until she got to running temp that's when the idle issues returned. So took car straight back. Re-scanned NO faults ..... Grrr

So what else could be causing the problem? PLEASE HELP
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Old 02 Oct 2016, 08:31 AM   #2 (permalink)
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Re: Low Idle then Cuts Out - Caused From?

was the IACV (ISC Valve) new ?
If not then you may need to get it cleaned, they gunk up, your old one may have just needed a clean tbh.
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Old 28 Mar 2017, 06:31 AM   #3 (permalink)
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Re: Low Idle then Cuts Out - Caused From?

I would cleaned the IACV vave and check the spark plug wires.
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