BMW Questions? Ask a BMW Repair Expert for Answers.
The most common cause of a low idle and stall on the mini is a vacuum leak. Most of the time it's as simple as the dipstick is not pushed in all the way or the oil cap is loose.
If it's not one of those obvious causes then you will have to do some diagnosis to pinpoint what else might be going on. Do you have access to a scan tool?
Can you hear any whistling, or suction type noises coming from the engine?
Does your scan tool monitor fuel trims?
If so, can you see the fuel trims getting pulled lean or rich when you press the clutch?
What does it look like the numbers do when you press the clutch?
So it doesn't seem like a vacuum or fuel issue. It can jump between -10 and +10 without causing a stall or being considered lean or rich.
It sounds like a mechanical issue with the clutch. Has the clutch ever been replaced? How many miles do you have?
It sounds like it. This is a dual mass clutch set-up on this car. It has a couple of different pressure zones and it can act like it's engaging/disengaging when it really isn't.
There are no trouble codes stored right?
Some of them have a hill assist option. I'm pretty sure it was an option on the 2008 but there is an on/off button for it on the dash. I think the driver's side of the dash.
I was almost certain that there was, but I can't seem to find it anywhere in the literature. Are you thinking that's what's going on? It's a normal function of the hill assist?
I would think it would set some kind of throttle position correlation code if it were a throttle body issue, and I would expect to see the fuel trims go lean.
I just haven't seen a stumble related to the clutch on one of these coopers before.
It still sounds like a clutch issue. It would make sense that you could get it to start by pressing the gas to overcome the load from the partially engaging clutch.
Worn clutches are a common issue on the cooper. Most drivers get about 100k out of them. It's a pretty peppy motor for a somewhat small clutch disk.
Sounds good. Keep in mind if my response isn't rated after a few days then the question will drop to my timed out list.
I get it. I'm trying to find instances of a similar concern in my sources also.