Start/Stop Problems

daborg · Post by **daborg** » Sun Jul 21, 2019 11:57 pm

Hi all - I’ve read the list of conditions that need to be met for the start/stop to function (essentially the perfect alignment of the solar system and a nod from the heavens it seems).

Mine is very erratic. For example, engine warmed up after a 100 mile motorway jaunt, battery charged and no A/C Max.

Stop in long queue of traffic. Engage ‘P’, engine cuts out. Then at a random period of time decides to restart with no input from the driver. It often does the same when I keep my foot on the brake - eg at lights or in traffic.

Is this normal?

CharlesElliott · Post by **CharlesElliott** » Mon Jul 22, 2019 6:45 am

Yes...perfectly normal.

daborg · Post by **daborg** » Mon Jul 22, 2019 8:45 am

Wow. I’ve never experienced this on other cars. Have

Is it supposed to function this way?

GWL · Post by **GWL** » Mon Jul 22, 2019 6:06 pm

daborg wrote: ↑Mon Jul 22, 2019 8:45 am Wow. I’ve never experienced this on other cars. Have

Is it supposed to function this way?

Yes - My Turbo does and my 2 previous BMWs did the same.

ScotMac · Post by **ScotMac** » Mon Jul 22, 2019 7:22 pm

I'm not a great fan of start/stop as I don't do much city driving but it does seem to "do it's own thing" at times

Paul · Post by **Paul** » Mon Jul 22, 2019 7:28 pm

The devil’s work - turn it off as soon as you get in the car!

Firstmacan · Post by **Firstmacan** » Mon Jul 22, 2019 8:50 pm

+1. Especially the bit about the devil

I've set the diamond button to disable it first thing when I get in.

subaxtreme · Post by **subaxtreme** » Tue Jul 23, 2019 12:21 am

How old is the battery I imagine the senses voltage- wont start if it got too low. That would make it erratic

Alfanut · Post by **Alfanut** » Wed Jul 24, 2019 12:56 am

Firstmacan wrote: ↑Mon Jul 22, 2019 8:50 pm +1. Especially the bit about the devil
I've set the diamond button to disable it first thing when I get in.

Good idea. I was wandering what function to assign to the diamond. Thanks.

Makanik · Post by **Makanik** » Wed Jul 24, 2019 7:16 am

Firstmacan wrote: ↑Mon Jul 22, 2019 8:50 pm +1. Especially the bit about the devil
I've set the diamond button to disable it first thing when I get in.

I too assign it to the diamond button but more to temporarily disable rather than all the time e.g. when parking, or when waiting to pull out of a busy junction.

When it is disabled, there is a double hit on fuel consumption - no stop/start and no coasting function. You lose out if it it disabled say on a motorway because of loss of coasting.

Start/Stop Problems

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