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      12-04-2012, 01:11 PM   #7
Some dude
Drives: E28 M5, E92 335i
Join Date: Sep 2011
Location: Northern VA

Posts: 1,678
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Drive it hard. There may be carbon buildup inside one or more of the combustion chambers causing a poor idle. It can happen easily if you have excessive oil dumping into the intake ports (usually 5 is the worst) from the PCV system and/or a bad injector.
RRT Racing
E92 335i/6MT Dinan Stage 3: intercooler, oil cooler, intake, flash, exhaust, LW dual-mass flywheel.
Vishnu PWM methanol custom trunk mount, Diffsonline 3-clutch Salisbury custom diff, Ohlins Road and Track coilovers, Vorshlag camber plates, much more...
E28 M5 w/ buncha stuff, R171 SLK350
JamesM3M5 is offline   United_States
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