E30 Zone

I've got a 316 m10 running on the original carb. Once its up to temperature it idles erratically, with revs rising and falling.

Any ideas what this could be?

I cant find any leaks on any vacum lines , however one of the vacum lines doesn't go anywhere, it leaves the carb then joins a plastic disc but this isn't connected to anything. Is this correct?

anyone got any idea what the problem could be?

Pictures of this vacuum line, and car mileage.

The pierberg 2BE carb is a pile of crap. It as electronic idle, electronic choke and electronic 2nd barrell, so I expect it's one of those playing up.

You're best off spending £300 and getting the Weber replacement carb, a DMTL32/34, which is designed and jetted for this car.

Or if you're feeling brave, a Weber 32/36DGV.

capnmchl wrote:Pictures of this vacuum line, and car mileage.

The pierberg 2BE carb is a pile of crap. It as electronic idle, electronic choke and electronic 2nd barrell, so I expect it's one of those playing up.

You're best off spending £300 and getting the Weber replacement carb, a DMTL32/34, which is designed and jetted for this car.

best thing you can do, i have fitted loads of these over the years, it usually transforms the car

only downside is the econometer thiungy wont work afterwards and your have to find somewhere to mount the choke cable

milage is only 60,000

this is a pic of the line with the plastic disc


I know the pierburg is crapbut just want to get it running a bit better for now.

Anyone have any ideas?

I had a carb on my first E30 and it had so much wear in the moving parts it wouldnt run cleanly. A Weber carb cured the problem.