BMW 740i Miss Fire Help

[*Adz*]

I parked up about 4 days ago, all fine, started today... and i have a miss fire... and a smelly egg smell lol. Any idea what this could be, also wheres the best place to get a coil from?

Thanks

[mega-e39-fan]

Misfire could be anything from a coil pack to a faulty sensor - best to get the codes read for a proper diagnosis. For a coil pack try Euro car parts (there are codes for 25% off available online) or alternaively BMW Costwold the trade sponsor who can do a good discount for members.

[*Adz*]

Well when unplugging the coils, it dont really make much different, i dont really know anyone with a diag machine that will fit? Took one plug out, it had a lil oil on it, but when you take plug cover off on the and theres a noise there like slight knocking/arcing noise, but once that plastic bits on you cant hear it....

arrhhh what to do! I dont want to end up breaking it!

[slim_boy_fat]

Might be a blocked catalytic convertor but as above, fault codes are your friends.

[*Adz*]

Fault codes are my friends, but firstly need to find someone or somewere with a fault code reader lol.

And would a blocked cat make it missfire?

[slim_boy_fat]

Could account for the rough running, and the smell.

[*Adz*]

Hmmmm.... This is where i should of stayed with Vauxhall lol... I know plenty of people and i know more about the cars myself lol. I look at this BMW and im lost lol.

[*Adz*]

Well we've put a computer on it, and the fault codes are 77 13 23 25 50..... ???? now im still lost lol

[Ingussc]

http://www.endtuning.com/bmwcodes.html
The best way to read your faults and errors is your local BMW DEALER, they won't charge more than 50 pounds, but will give you a full description and meaning of these faults. Sometimes you have faults about coils and lambda sensors because of vacuum leak in inlet etc...

[*Adz*]

Hi, thanks for your help, what list do i look at there? As there are a few there.

[slim_boy_fat]

Have a look at this thread on bimmerforums CLICK HERE - lists the codes with their meanings.

[*Adz*]

I think i cured it, plugs were capped in oil, cleaned up and put in.. happy days now, new rocker covers and plugs tomorrow

[Ingussc]

Have a look at this thread on bimmerforums CLICK HERE - lists the codes with their meanings.

Different Engine Controls has a different code meaning: SEE HERE !!!
"P" codes not always are appropriate to real BMW meaning.

[takemetothepub]

I think i cured it, plugs were capped in oil, cleaned up and put in.. happy days now, new rocker covers and plugs tomorrow

um, I'd be finding out why they are covered in oil!!!!

Not a good sign to say the least.......

[*Adz*]

They are covered in oil as the rocker cover gaskets in the middle is leaking... hence ive ordered new one