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      11-29-2012, 01:00 AM   #4
aM.
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Drives: 08 135i 6MT
Join Date: Jan 2012
Location: Maryland

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Did you replace the spark plugs directly from BMW? It could be a couple things....and since the car isn't throwing codes it's hard to know. Carbon build-up possibly? It could be the HPFP....if your injectors and spark plugs, etc, have been replaced that's the only other thing I can think of that is fuel related. No rattling, or weird noises in engine bay?
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Old| 2005 s2000: KPRO, Invidia q300 v4, PLM header, BERK 70mm HFC, Vortech v2 (3.6" Reichard Pulley), FMIC, ID 725cc (397whp/243tq @9psi), Tuned at Innovative Motorworks.
New| 2008 135i: PTF Tune, RB Turbos, ER CP, TiAL Q, BMS OCC, BMS DCI, AA 2.0 FMIC, VRSF 3" DPs, Berk Mids, CP-E Axleback, Robs' PCV.
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