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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 03-28-2013, 06:20 PM   #1 (permalink)
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engine misfiring! coil packs? 1998 318i

cylinders misfiring in every gear.( can barely drive it) this all happened in one day! valve cover has been leaking oil into most spark plugs for a bit. sounds like i need new plugs, coil pack,gasket,wires!!! Is this a hard fix on a 1998 bmw 318i???
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Old 03-30-2013, 09:44 AM   #2 (permalink)
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I just saw your other post regarding the spark plug wires. First, you should get the On Board Diagnostic (OBD) system scanned for Trouble Codes (DTC) to determine which cylinders are missfiring. The Code will start with P03xx if their is a misfire. The last two digits (represented as xx) will be which cylinder is misfiring.

What you want to to is swap the coil pack from the cylinder that is misfiring with one that is not. If this misfire follows the coil pack, then you know the coil pack has gone bad and needs replacement. With spark plugs, BMW engines are pretty picky about what plugs they use. I personally prefer NKG plus, and use the BRK6EK plugs in my M52.

The oil leaking into the plug wells is from the Valve Cover Gasket (VCG). Its a rubber gasket, and over time turns hard and brittle from the heat of the engine. This is quite common. I have replacement my VCG because of this before.

Replacing the VCG and plugs/wires/coilpacks at the same time will save on labour costs as the old ones will all need to be removed to replace the VCG.
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