Re: (xEdgeDubx)
yeah the idle switch is also mounted on a metal tab, it could be heat expansion causes this to no longer make contact. it would be a 840-1500-840-1500 cyclical rev if the switch wasn't contacting or a bad motor mount or something.
the other one is the 2500rpm cycle. When the ecu idle switch is working, the ecu will cut fuel at 2500rpm because you shouldn't be idling over 2500rpm (runaway motor rpms) with the pedal at idle.
That would indicate a massive air leak into the intake manifold. the most logical spot is the ISV tubing, the IDLE AIR SCREW, or a gasket.
Come over to the g60 fourm and maybe we can help more
