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C220cdi 2004 Misfire/Manifold issue

HarrySaimbhi

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Joined
May 6, 2009
Messages
42
Hi Guys, wondering if you can help.
I have a C220 Cdi on a 2004/04 plate, bought the car recently and every so often when revving it was making a screeching noise - loosing air and then going into limp mode. Disovered one of the manifold bolts was missing, have had the manifold taken off, drilled the broken stud out and all fitted back up, Since this has been done the car leak has resolved but it has developed a new fault, on idle the car misfires, this was not there before the manifold was taken off.
It only does it on idle, when driving it, its fine and drives very well, any ideas? I know it points to injectors, but strange thing is this was not there before manifold was taken off...
Any help would be greatly appreciated...
 
Sounds like a possible air/fuel leak within the fuel system somewhere.

Doesn't part of the fuel rail come off to get the manifold off?
 
Hi mate thanks for the response, not to sure as had someone else do the job for me.
Defo no more air leak or a fuel leak.
Is that the common rail?
 
I'd take it back and get them to check all the connections that were disturbed.

If you did not have this specific problem before but it manifested itself after the work, then that would pretty much point to it.

Another member had their manifold off and, AFAIK, the fuel rail has to be disconnected/removed to gain access to the manifold. It is possible that there is the slightest of leaks causing your idle 'misfire'.

Am sure the 'C' in 'CDi' = Common (Rail)!
 
Just spoke to mechanic and the rail was not touched, as its not near the exhaust manifold???
Thats what i have been told anyhow....
 
Is the 'screeching' still present? When you say 'losing air', what do you mean exactly?

I too think it may be injectors but you would need to get it into somewhere capable who have STAR
 
"Disovered one of the manifold bolts was missing, have had the manifold taken off, drilled the broken stud out and all fitted back up"

ive got this same issue on my 124 coupe.. was it a big job to do?
 
Had it on a star machine last night, confirmed it is a Injector, but fault also on oxygen sensor which he cleared. So need an Injector now, any recommendations?
 
Billy, it is a bit of a pain as i had to remove turbo and loosen Cats to get to the manifold, had the stud drilled out by a merc specialist as it is a bit of a tricky job for me...
 
i heard if that bolt falls through its a bleeding head off job!
 
Yep thats what i was told to, extra carefull and no butter fingers...
 
Ffs!
 

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