No. 3 cylinder not firing on 1985 190e

Any ideas what would suddenly cause the no. 3 cyliner on my 190e to stop firing properly. The engine was rebuilt 1 year ago with no problems since. I just replaced the fuel pump which was going bad anyway, but the problem is still there. Any thoughts on what would cause this and possible solutions?

Thanks

Brian

[Benzmac]

You will have to do a compression test to see if there is any internal leakage.

Also you could have the engine's ignition system checked for a misfire.

How did you isolate number three?

If you indeed have an identified dead cylinder it has to be one of three things; no spark, no injection or no compression.

As Benzmac said do a compression test first and go from there.

Have a nice weekend,

Thanks for your advice folks. The problem turned out to be that a mechanic I recently used forgot to reattach the air breather hose. Reattached myself, and it runs great.

Brian

[ymsin]

Vadrill - glad to know your problems' solved. But how in the world did the mechanic slip up??

Goodness if I would have much confidence if that happened to me ...

Hows the car running now?

Hope you'd have a great start to your week.

ymsin

I tried a different mechanic on the recommendation of a co-worker. Big mistake. His work was sloppy. Oh well, live and learn.

The car is running great now.

Brian