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AAC Valve No Signal

Posted: Sun Sep 04, 2016 2:42 pm
by Old Booster
E-HCR32 Auto
Nistune 1.259


Nistune is not picking up any signal from the ECU. I've checked continuity from the harness plug to ECU plug and all is good, the actual valve seem to be functioning as it will adjust idle when cold and different electrical loads are applied, e.g, headlights and fan. The only problem I currently have is that when the car is stone cold in the mornings, upon startup idle is unstable until I give the throttle a light stab, but I think this is more a old/dirty injector issue.

Is there a bug in this version of nistune or do I have a problem elsewhere?

Cheers Mike.

Re: AAC Valve No Signal

Posted: Mon Sep 05, 2016 11:28 am
by Matt
Hi Mike

Nistune just lets you view and adjust the settings of your factory ECU. So any problem with an output like the valve is likely not an ECU issue if it is working otherwise

Have a look at the AAC duty % inside the guages and check using a duty cycle meter at the AAC itself so check it is working correctly

It wouldnt be a software bug