E36 Cold running problems

[mc5]

Recently bought an E36 M3 (78k miles). First thing when the car is cold I get misfires when idle & hestitation when accelerating. This happens for 5-10 mins then once warm all is ok.

Anybody got any ideas what it could be. Plugs & 02 sensors changed 5000 miles ago.
Some people have said it could be AFM or coils but wouldnt this affect the car all the time??

Edited by mc5 on Thursday 28th September 12:43

[kiddle]

This sounds like the problem i had on my ZM Coupe, (S54) ... but it was the MAF unit. I had it changed under used car warrenty so have not got a clue on price. But sorted the issue.
You can clean these, but not an expert on how ... anyone?

[r5gttgaz]

Coolant temp sensor?

[mc5]

kiddle said:

This sounds like the problem i had on my ZM Coupe, (S54) ... but it was the MAF unit. I had it changed under used car warrenty so have not got a clue on price. But sorted the issue.
You can clean these, but not an expert on how ... anyone?

I am suspecting the maf but at £250 I want to be sure.Is there anyway to test it.

Was yours just having problems when cold & fine when warmed up?

[StuB]

My local independent carries spares as these are fairly common. They do a test by blowing compressed air over the MAF and the engine should almost flood if it's working. If it's not, not a lot happens.

Could also be a coil pack and I think faulty coils log a fault code.