Mechanics

BMW M3 MECHANIC PROBLEM

2003 BMW M3 • 98,000 miles

Problem: I have 2033 M3; the engine is sputtering/attempts to "choke" as in a cylinder or two are misfiring. The "Check engine light" comes on after a while and sometime it goes off because the problem happens intermittently. The first attempt to repair it was by the BMW dealer, and the say it was coil #5, which they replaced. After 200 miles of running, the same problem returned, so I took it to another mechanic that specializes on German made cars. They said it was the #5 fuel injector (after replacing some of the electrical harness to the spark plugs/coils) they replace the Injector. Two days later, the problem returns and I take back to the same Mechanic/shop. They said it needs replacement of the two fuel pumps - I said are you sure that is the problem? And they said yes- so they replaced the fuel pumps. However, after 150 miles, the same problems returned. The car is at the same shop and being tested; first feedback I get now is the possibility of a cylinder leaking compression, or a defective main ECM/ECU. I have spent $900 at the Dealer and so far over $1800 with the second mechanic. Can you provide your thoughts, recommendations and advice? And how much a rebuild ECM should cost? (Mechanic said they probably can't get a new one since the stop making it after 7 years from the manufacturing today of the car)
Here are the present Faults:
206 Misfire Cyl 2 without Cyl Cutout

208 Misfire Cyl 4 without Cyl Cutout
209 Misfire Cyl 5 without Cyl Cutout
210 Misfire Cyl 6 without Cyl Cutout


213 Misfire Multiple Cylinders without Cyl Cutout
31 Fuel Injector Cyl 5

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Robrosado
January 23, 2013.




I would look at the other injectors before doing anything. They may need to be professionally cleaned or replaced. They can be tested by a shop.

I would start there

as far as the pcm, it is still available and must be new, not rebuilt.

Roy
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ASEMaster6371
Jan 24, 2013.
From where can the mechanic order a New ECM (you wrote pcm?). Rplacing 5 fule injectors sounds costly how one knows they need to be replaced? I already paid them $1500 to replace rhe two fuel pumps and it did not fix the problem

Tiny
Robrosado
Jan 24, 2013.
Hello! Anybody home?

Tiny
Robrosado
Jan 24, 2013.
A replacement brain? Not for that car unless you get it through the dealer and pay lots

Dr. Hagerty
Feb 4, 2013.

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