I purchased a GC8 a couple months ago with a few problems, the usual idle problems in neutral after short drive and cuts off the engine. Especially when the engine is hot and you switch off, turning it back on again right away fails.
I've taken the car to two reputable workshops in Perth and $3K later, the problem still persists however narrowed down to the following:
It seems the alternator is affecting the ECU when turning on the car and whilst driving causing intermittent idle issues in neutral or low rpm and stalls. If I disconnect the alternator and turn on the engine it works however once I connect the alternator after the engine is running it causes intermittent idle choking and stalls.
Do you guys have any thoughts on this?
Work on the two workshops have previously already tried:
-Power FC ECU Tune
-AFM/Idle Air Control Valve Replacement
-Water Temp Sensor Replacement
-Plus other maintenance
Many thanks in advance,
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