Golf IV / Jetta IV :: 2003 - Uneven RPMs When Cruising


Mar 1, 2015

Occasionally I can feel light jerking when cruising steadily at around 2200 rpm. for a second the rpms increase by ~50, not enough even to notice any change in speed, and then goes back where it was. it is as if the clutch was slipping.

My first thought was MAF so took one from a working car but problem did not go away.

A minor thing that may be unrelated: the transmission also sometimes doesn't set shiftpoints properly, i.e., when accelerating uphill, it would go from 1st to 2nd ok, then when it reaches the point to shift to 3rd, the 3rd gear stays only for a second or so, and then shifts to 4th.

So I disconnected the MAF sensor altogether and the problem went away! My conclusion was then that it must be the wiring between ECU and MAF, so checked the cables between ECU and MAF, found all resistances within spec (below 2.5 Ohm). Since the problem is intermittent, the resistance of the cables doesn't tell much.

Checked with vag-com and there are no codes. Where to go from there? 2003 AVH (auto)...

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