July-2018 update:
Well, things got interesting one day on my way to work. I was cruising along through down, when I felt a judder/miss, only for a moment or so. Then, a few minutes later, when I tried to pull away from a stop street, as soon as I accelerated in 2nd gear, the car jerked violently. I pulled over to check if there was anything obvious wrong, but didn't see anything.
Then, a few hundred metres down the road, as i was crawling to a stop for a red robot, the car switched off suddenly. I restarted and then all was ok. I decided to pull over for 10mins, and then try limp back home. The 5km trip home was uneventful, with only a couple of warning lights showing up in the dash. As i got home, I was reversing onto the grass, when the car seemed to loose power and eventually stalled. It wouldn't start again for another 8 attempts.
A pic of the faults showing in the cluster:
So, onto the diagnosis...
BMW On-Call Edenvale (aka DannyBoy), came through to scan the car. It was showing all sorts of faults, from a faulty crank sensor, to a starter motor malfunction, to a DSC fault, to an ABS fault.
We tested starting the car a few times as well as the voltage (as we suspected maybe a dodgy battery was generating all the random electronic faults). The car would battle to start and idle smoothly, but once it settled down and the voltage stabilised around 14.4v, the motor sounded normal.
This then led us to testing out some different batteries. In total we tried 4 batteries, but the faults and symptoms were still there regardless. A little bit more investigative work and suggestions then pointed to a faulty crank sensor.
I managed to source one from Goldwagen at R570 (incidentally, this is the same part number for the E87 135i N55 motors). The OEM BMW part was over R2000!
Here's a pic of the part:
To install this piece of kit requires tiny hands, a good deal of patience, some luck and let's not forget the use of quite a few expletives during the process.
Here's the location of the crank sensor:
We put the car on the ramps, and the easiest (if you can call it that) way to access the crank sensor is from underneath the car. It sits at the back of the motor on the LHS, just underneath the starter motor. You literally cannot see what you are doing at all, and most of the job is done by feeling with 2 fingers as that is all that space allows for.
I did get quite despondent about this, but Danny persevered and managed to make a plan.
Once this was done, car started up 1st time as per normal, settling into a steady idle, with no faults showing in the cluster.
I took it for a long drive a few days later, and all was well, no issues, no fuss. So I'm glad this has been resolved and I can enjoy the car again.
I'll upload some videos off the issues just now....
Next up is the track day at Red Star Raceway this weekend, looking forward to that and stretching it's legs a bit in a controlled environment, plus hooning is fun :smilebounce: