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Old 01-13-2013, 05:48 AM   #6
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Join Date: Sep 2011
Location: Brisbane
Posts: 1,098
My Ride: 1989 BMW 535i
Had both those problems. I solved my hesitation with the correct spark plugs but consider vacuum leaks, the DISA or VANOS. I've had coil packs done too but only because one completely failed.

I solved my vibration by having the idle raised, nice and easy permanent band aid fix was only by 100rpm and it solved it. I suspect VACUUM leaks but will have that solved in two weeks.

If you need anything I've got a library of part numbers for the systems in the 330i/Ci.

Last edited by trive2; 01-13-2013 at 05:49 AM.
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