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4.6is low compression cyl 3
Discovered today that my intermittent misfire in cyl 3 is something serious. Low compression. Found out after changing sparks and coils and the miss got worse after being better for a day or so.
I think having plugs and coils that work at optimum has just revealed the real weakness where ever it is.
It now goes into engine fail safe mode on warm starts and I have to use inpa to reset the adaptations. The fault code is now not misfire but something else, I'll check it later. but as it's a head off job either way, I have stopped trying to diagnose it and braced myself for a big bill. Should have bought from a dealer, but you live and learn.
I'm giving to a trusted mechanic in the week but does anyone know what the possibles are?
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'11 xDrive40d M Sport - 4-zone climate - Active cruise control - top view - side view - massaging/heated/ventilated seats - Powered bootlid - Comfort Access - BMW Advanced loudspeaker system - Rear side windows sunblinds - Adaptive headlights - Soft close doors - comfort seats - DAB digital radio - Panoramic glass sunroof - folding mirrors - High beam assistant - Head up display - Speed limit display - Lane departure warning system - 7 Seats - Digital TV - Internter - apps - USB
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04-06-2013, 01:58 PM
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