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Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 02-24-2017, 04:03 AM   #1
Nexjan
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Join Date: Feb 2017
Location: Lawrence
Posts: 3
My Ride: Bmw 328i
Multiple cylinder misfires

Hey how's everyone doing today,
I have an issue that i just dont know who to turn to anymore to resolve this problem, i have a 99 bmw 328i, 175k miles runs and drives but ive been in a bit a pickle lately with my baby, when i press the gas pedal she doesnt seem to respond to how much gas im giving it and lags its way up on the meter until it clicks and it just takes offf, it also shuts off often when i make stops (like at a red light) there are mutiple cylinder misfires so decided to change all 6 coil packs and all 6 spark plugs and that didnt seem to change anything, i also changed the timing belt and no better results.... is there anything else that could be causing this misfires?

Last edited by Nexjan; 02-24-2017 at 04:03 AM.
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Old 02-27-2017, 01:17 AM   #2
zigoapex
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Join Date: Nov 2013
Location: Pennsylvania
Posts: 103
My Ride: bmw 325 xi
look for vac leaks around valve cover gaskets, especially the gaskets around the plugs, they could let air in or leak a little oil, causing a misfire,
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2003 325xi > new plugs-O2 sensors pre cat replaced ccv valve and 4 hoses-S.A.P.hoses and intake plug-M.A.F-intake boot oil housing gasket water pump and belts-fuel filter-fuel pump-cleaned I.C.V.-throttle body-changed front differential oil--drivers side-axle-passenger side axle Front wheel bearings-front lower control arms-control arm bushings-Steering Rack Boots-alternator-rt front tie rod, front brake pads and rotors.
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