QUOTE(coolkwc @ Jul 19 2015, 04:07 PM)
I did able to clean off the carbon effectively, the throttle body was just so dirty before cleaned. I just suspect the TB cleaner clean off the carbon on the sensor causing it to detect too much airflow with the same learnt value before cleaned. I use OBD2 to check, the throttle position is still the same, but the fuel flow is increase, it means it compensate too much fuel for idle. I check the fault code as well, 'system too rich' P0172 error recorded after cleaned.
I once cleaned 70k before, that time performed by workshop, same thing happen too, the workshop just plug in the computer and let the idle throttle to relearn. Online search alot of same cases happen to other brand of car too.
Maybe you need to try clean up the sensor connectors with WD40?I once cleaned 70k before, that time performed by workshop, same thing happen too, the workshop just plug in the computer and let the idle throttle to relearn. Online search alot of same cases happen to other brand of car too.
Jul 19 2015, 04:15 PM

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