316I rough running on start up
Moderator: martauto
My wife owns an H reg 316i Automatic. The same problem has persisted for years. On start up the engine hunts and blows blue smoke. I appreciate the vehicle is fuel injected but the only way I can describe the problem is with a carburrated vehicle the choke is left fully out. Before pulling away the vehicle has to be reved up but once the engine is warm the problem goes away. We used to send the vehicle to BMW for servicing and they were not successful in finding the problem. Does anyone have any ideas. Any advice will be much appreciated. Thanks.
have you tried changing the ICV (Idle Contol Valve)?
BTW: do you have one of these by any chance?
http://www.google.co.uk/imgres?imgurl=h ... CB8Q9QEwAA
BTW: do you have one of these by any chance?
http://www.google.co.uk/imgres?imgurl=h ... CB8Q9QEwAA
E30 Parts Galore!! 07901 888019
[quote="bss325i"]
Get a f* grip,we are talking about 20+yr.old sub £10k cars here,NOT the crown jewels!
This sounds like a common fault, my 318i has a similar problem, starts from cold, chugs away, will die if revs. aren't kept up. Once its been going for a couple of minutes, its fine, it doesn't seem to blow blue smoke though, I suspect the Blue sensor, but it probably needs a service.
1991 325i Touring Alpine White II
1994 318i Touring Sterling Silver
We removed the ICV with the intention of replacing it. Unfortunately, we were supplied the wrong part. A mate of mine checked the old part and appeared ok. It was washed completely and refitted. The problem persisted but as the vehicle became warn the revs dropped, so appeared that it was working ok. The problem is especially noticeable in very cold conditions and much better in summer time. Do you think the problem is still the ICV? Thanks for your input, much appreciated. 
Sorry what I meant to say was, the smoke is black not blue (blue being oil rings). It is, therefore, running rich at start up. Prior to this last service - very recent, the car used to hunt - very bad in winter but improved dramatically in the summer.
if you test its resistance you should get around 3500ohms cold and 350ohms at running temp..it should be in the thermostat housing
Only in the good lord we trust.. In everything else we check!!
1988 325i Tourer, Lowered, Deep Dish Alloys, Obc, Cruise Control, Heated Leather Sport Seats....
1988 325i Tourer, Lowered, Deep Dish Alloys, Obc, Cruise Control, Heated Leather Sport Seats....
-
teamalsoran
- E30 Zone Newbie
- Posts: 102
- Joined: Sat Apr 23, 2005 11:00 pm
leaking inlet manifold gaskets are common, try spraying the manifold ports with wd40 with the engine running, if the gaskets are leaking the engine idle will chance
-
Brianmoooore
- E30 Zone Team Member
- Posts: 49358
- Joined: Mon Jan 10, 2005 11:00 pm
Hadn't noticed this thread before, and I see your initial description of the fault was spot on: " the only way I can describe the problem is with a carburrated vehicle the choke is left fully out". This is exactly the effect of a failed blue sensor.
Would you like to name and shame the BMW dealer who couldn't diagnose this most common and simple fault?
Would you like to name and shame the BMW dealer who couldn't diagnose this most common and simple fault?
