e30 m3 lumpy when cold

[mds]

Good evening everyone.

I would be greatful for any help

My e30 m3 when started first thing in the morning runs very lumpy and stalls , but after 5 minutes it idles solid a s a rock and runs perfectly.

I have replaced all plugs and has the car fully serviced. I also have replaced the blue temp sensor. None of this has helped i checked the bellows in between the inlet manifold for air leaks but there are none and all other vacuum pipes have been checked along with the dizzy cap rotor arm and leads

Could this be the air mass meter??

Any help will be much appreciated

Any help will b

[harry_p]

something you could try, disconnect the cars barometer. its a small rectangular box about 1.5in by 2.5in on the nearside inner wind, next to the airbox / maf setup.

it basically alters ignition and fueling depending on altitude, however, people have been finding they can fail fairly regularly, and when they do they tend to fail as if the car is at altitude, and lean off the mixture.

just disconnect the electrical sensor for the moment and see if it helps at all.

a lot of people on s14.net seem to run with theirs permenantly disconnected, as new ones are around $100 and are of no benefit unless you regularly drive at higher altitudes