When I first purchased the car there was a strange hesitation whenever I would apply 3/4's or more throttle in any gear under any load. I thought it was due to the catalyst and mufflers being clogged. On went a new header back exhaust. Now that the new exhaust is on you can hear what sounds like the engine misfiring during 3/4 or more throttle application. I thought it was the fuel system somewhere. Checked the fuel pressure regulator, no leaks, fuel pump seems ok too. I removed the spark plugs and found excess gasoline on the spark plugs. I cleaned them off. They are new plugs. What could be causing my missfire?
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Sounds like a bad plug wire.
EDIT: Do the 4 bangers have plug wires or is it coil-on-plug?Dan
1989 325i 5-speed -
try your dizzy cap and rotor (im not sure what system the m42 uses but it should be similar to m20 motronic).....i had a similar prob.....really bad idle hunting, and random hesistations or what felt like misfiring around 2k Rpm under no load...just got a new dizzy cap and rotor yesterday..seems to have fixed the probJUNGL3
1990 "333i" SportComment
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Dizzy cap?Comment
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distributor cap
Dizzy is weak slang ;)
NASA MidSouth TT Director / GTS2 #018
Mods: Coastal PS Fluid, 10w40 Oil
Future Mods: Bosch Micro-Edge Wiper Blades, Painter's Tape, Spark Plugs, Freezer for Nutty Buddys, Adam Nitti CD'sComment
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Im used to Honda engines, I didn't even know the M42 used a distributor cap since it's not connected to the camshaft. I thought it was a distributorless ignition system.Comment
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Since I'm going with a turbo setup, are there any upgrades like the MSD boxes that could work on this engine?Comment
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