my auto has had a couple of hiccup's recently, their not frequent, but have happened a couple of times. whats happening is when the auto is switched into park or neutral the revs die down significantly then jump back up to normal idle speed. the car has stalled a few times due to this.
one example of this is going through drive through at maccas, i flicked the auto into neutral while waiting to lessen the strain on the auto, and it stalled.... yes i know a little ironic.
the only modification to the auto is a external trans-cooler.
the cars done 86 XXXkm's
any one know what is causing this or how to fix it.
p.s. i cleaned my intake about 6000km's ago so it should still be fairly clean.