Hi
I’ve had my 2011 BMW 730Ld (F02) for 5 years now and have clocked 120k on it. The last 2-3 years I’ve noticed that when it’s very cold in the morning (usually 6 deg C or below) when pulling out of the drive onto the main road (slight incline on driveway and then slight dip onto pavement before the road) the car surges and also stalls if the surge is too great. I can then restart the car and it will run absolutely flawlessly throughout the whole day as though that fault never existed! Even if it’s been parked for 7 hours in the freezing cold while at work. It only happens when parked on my driveway overnight and then a cold morning start. Hence its not been a big enough issue for me to spend loads of time and money on... but I’d like to sort it out now...
I was reading lots into and quite a few people said it was because their ZF6 gearbox was low on fluid. So 3 months ago I thought I’d might as well get it serviced as car done 120k and gearbox never been touched. Got the original ZF fluid and kit done by ZF specialist, but it did not fix the morning issues.
I have the latest version of ISTA D and that is not showing any errors. I only get a couple of longstanding errors, one is AUC sensor (not bothered) and other just about the DDE switching off the air con.
I’ve looked after the car immaculately, even got the carbon build up removed with walnut blasting from all the ports, EGR cleaned, swirl flaps removed and intake manifold cleaned etc. Glow plugs and relay changed... Car drives so smoothly, never hesitates. There is no rough idling etc. Everything as it should be. Starts on first fire up no problems, even if left for 3 weeks in the freezing cold. It’s only when getting out of my drive slowly...
So then I read a bit more and there was a mention of fuel pump failure etc. People had advised putting the ignition on for 2-3 mins and then starting the car. I have been doing this now for the last 3-4 days and have not had any stall or significant surge in power when leaving my drive in the morning.
So where should I go from here?
Would really appreciate some guidance...
Thanks
I’ve had my 2011 BMW 730Ld (F02) for 5 years now and have clocked 120k on it. The last 2-3 years I’ve noticed that when it’s very cold in the morning (usually 6 deg C or below) when pulling out of the drive onto the main road (slight incline on driveway and then slight dip onto pavement before the road) the car surges and also stalls if the surge is too great. I can then restart the car and it will run absolutely flawlessly throughout the whole day as though that fault never existed! Even if it’s been parked for 7 hours in the freezing cold while at work. It only happens when parked on my driveway overnight and then a cold morning start. Hence its not been a big enough issue for me to spend loads of time and money on... but I’d like to sort it out now...
I was reading lots into and quite a few people said it was because their ZF6 gearbox was low on fluid. So 3 months ago I thought I’d might as well get it serviced as car done 120k and gearbox never been touched. Got the original ZF fluid and kit done by ZF specialist, but it did not fix the morning issues.
I have the latest version of ISTA D and that is not showing any errors. I only get a couple of longstanding errors, one is AUC sensor (not bothered) and other just about the DDE switching off the air con.
I’ve looked after the car immaculately, even got the carbon build up removed with walnut blasting from all the ports, EGR cleaned, swirl flaps removed and intake manifold cleaned etc. Glow plugs and relay changed... Car drives so smoothly, never hesitates. There is no rough idling etc. Everything as it should be. Starts on first fire up no problems, even if left for 3 weeks in the freezing cold. It’s only when getting out of my drive slowly...
So then I read a bit more and there was a mention of fuel pump failure etc. People had advised putting the ignition on for 2-3 mins and then starting the car. I have been doing this now for the last 3-4 days and have not had any stall or significant surge in power when leaving my drive in the morning.
So where should I go from here?
Would really appreciate some guidance...
Thanks