Join Date: Feb 2012
Location: Swansea, South Wales, UK
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1999 E46 only firing on two cylinders
I desperately need some help.
The car, 1999 318i auto 1895cc E46 M43 engine.
I have owned the car for 4 years and it has been regularly serviced.
Whilst driving on the motorway I suddenly lost power, the engine temperature was normal and I had good oil pressure. RAC recovery man arrived andt ran some tests (fuel pump, injectors all okay). The engine is not firing on cylinders 2 & 3. The RAC man replaced the coil pack unfortunately this did not cure the problem. He advised that it is very likely that the Engine ECU had failed. I purchased a used Engine ECU, EWS, Ignition key and Ignition barrel transponder. All fitted okay, but the engine still refuses to fire on all 4 cylinders.
I have checked all of the fuses, cleaned all the electrical connections, etc.
The engine is has started (briefly) on two cylinders, but is obviously very lumpy.
Is it possible that the replacement coil pack fitted by the RAC man was faulty? Are there any other tests that I can perform before taking the car to a specialist BMW garage?
Any help / guidance would be gratefully received.