My misfiring experience...
11-08-2007, 11:48 AM
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My misfiring experience... Just thought I'd share w/ everybody in case any of you ever have a similar problem...
My car, 2000 M6 SS, 25000 miles, bolt-ons only w/ some nos.
One day out of the blue it started misfiring under any load, however it idled fine.
I combed the engine bay looking for vac leaks, none.
Cleaned air filter and maf, still misfired.
Read codes and here's what I got, some I knew were already there due to my exhaust setup ( no cats
)......P0135, P0155, P1133, P1153. These I plan to get tuned out in the future. However I got the obvious P0300 which indicates "Random/Multiple Cylinder Misfire."
So, I figured I'd start at the source of the problem and work my way up the ignition system. I replaced the plugs and wires and low and behold, problem solved! What's weird however is that neither the old plugs or wires that I took off looked bad. It's just crazy how something so simple can make the car run so bad.
My car, 2000 M6 SS, 25000 miles, bolt-ons only w/ some nos.
One day out of the blue it started misfiring under any load, however it idled fine.
I combed the engine bay looking for vac leaks, none.
Cleaned air filter and maf, still misfired.
Read codes and here's what I got, some I knew were already there due to my exhaust setup ( no cats
)......P0135, P0155, P1133, P1153. These I plan to get tuned out in the future. However I got the obvious P0300 which indicates "Random/Multiple Cylinder Misfire."So, I figured I'd start at the source of the problem and work my way up the ignition system. I replaced the plugs and wires and low and behold, problem solved! What's weird however is that neither the old plugs or wires that I took off looked bad. It's just crazy how something so simple can make the car run so bad.
11-08-2007, 12:18 PM
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There could have been a crank in one of the wires and it was arking (sp?) against a metal part on your engine instead of casuing a spark on the plug, its happend to me on a few cars now, the way I knew is because it arked on me when I got close to it