IAC testing question

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Dec 10, 2010, 05:38 PM

#16

rob328

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I have idle issues as well. I read in other tread that if you change the BISS screw settings your vehicle might need to be re-tune. Anybody can elaborate on contribute. I have changed my idle to 1100 (using ECU flash) and change some settings on the tables and with no luck.

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Dec 12, 2010, 04:47 AM

#17

grayw

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Quote:

Originally Posted by rob328

Adjustment to the BISS is not going to necessitate a retune. Did you try parking the stepper using Evoscan, to see what effect it had on the idle?

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Dec 13, 2010, 01:49 PM

#18

05blue8

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Mine moves...and clicks

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Oct 7, 2012, 02:30 PM

#19

prowakeskater

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Quote:

Originally Posted by kakarot305

i might as well check this out because am also having idle issues, altho am getting a CEL light about the o2 sensor..

ive been battling this issue for a long while and tried everything from boost leak testing to changing the ISCV settings to testing the IAC to cleaning the MAF (which was actually very dirty), but im happy to say I just now fixed the issue by going into constant open loop.

so forewarning to those of you who have these symptoms and may or may not also have the front O2 sensor CEL light - try replacing your sensor. or go into constant open loop.