Loving the GT 3.2 V6
AO Silver Member
Join Date: Oct 2002
The idle actuator on the later (99 on) cars are different from the earlier ones and can not actually be cleaned out. I found this out by taking mine off! On the 145QV it sits on the back of the throttle body (looking from the front of the car),
However when I reconnected it the engine refused to tick over below 2000 rpm. It required a full ECU reset to sort this out.
Having said that, I found that the lever that the idle actuator uses to move the throttle butterfly was very stiff. I investigated further by taking the air inlet pipe off and found that the whole of the throttle butterfly was covered in a black sticky residue. This was causing it to stick when fully closed, therefore making it impossible for the idle actuator to function properly. After cleaning this out and having the ECU reset the car runs perfectly. No more stumbling and revving at idle and no more low rev/light throttle jerkyness.
I think if you just take the air inlet pipe off and clean out the throttle body/butterfly, but do not touch the idle actuator, you should be fine (presuming yours is a later car).
Hope this helps!
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My Alfa History: 1983 Alfasud Sprint Speciale, 1999 145 Cloverleaf (QV), 2001 156 2.0 TS, 2003 156 2.0 JTS
My Current Alfa: 2005 GT 3.2 V6