Help needed - Bad Misfire E46 318i Steptronic/Auto - Bimmerfest - BMW Forums

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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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Old 06-30-2010, 03:26 AM
juice434 juice434 is offline
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Location: Malawi
Join Date: Jun 2010
Posts: 1
Mein Auto: E46 318i individual
Help needed - Bad Misfire E46 318i Steptronic/Auto

firstly I am based in Malawi (Africa) and we are not fortunate enough to have access to highly experienced mechnics, that said my current mechanic is an ex BMW technician who is a decent mechanic.

Few weeks ago car was leaking some oil from one of the pipes leading into CCV and the car went into fit a new CCV (crank case Valve) and all leading pipes into it. The car was running fine however I decided to get it sorted as I noticed the oil and was advised by BMW in South Africa that the CCV does need a change after some years.

I also got a full service done at the same time - when car returned it had a tiny misfire ... I sent it back to mechanics to check all pipes had been fitted properly, they claimed the new CCV was faulty and was leaking air in one of the pipes and claimed to fix it but next thing I knew is the car had major misfire , only 3 cylinders firing and seriously no power.

Unfortunately I did not keep the old parts so cannot test theory of mechanic regards faulty new CCV however I doubt that is the cause, personally I feel they may not have fitted it properly

I really need some help or some guidance so I can point the technician in the right direction, the car has been sitting for a month now - any help will be appreciated below are the codes that are showing:

I am getting really desperate now and am even considering flying in a mechanic from South Africa as a last option

274E Misfire detection, Checksum failure -combustion failure multiple cylinders with CAT damage

2742 Misfire detection cyl.1 , combustion failure

2783 Hot film air mass meter under min value

2785 DK-Potentiometer , throttle valve potentiometer defective

2731 Camshaft control inlet - VANOS

27BB Camshaft control outlet-VANOS

27B5 Control inlet-VANOS

27BD Control outlet-VANOS
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Old 08-22-2010, 02:14 PM
318ci_rob 318ci_rob is offline
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Location: Mid Kent
Join Date: Aug 2010
Posts: 3
Mein Auto: E46 318ci N42B20A
I would put a very good bet on this, take each coil pack out and check the rubber tube which slides over each spark plug, if there is a crack in the rubber, the spark tries to find the nearest metal object more than likely being the cylinder head causing the misfire. Let me know how you get on.
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ccv, cylinder, misfire, oil leak, power loss

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