Article by: John Taylor with edits, comments, and photos by Yutaka Nakagawa and Sean. Article applies to: all models with the M70 V12 engine. Comment by Sean750: John experienced some intermittently tapping lifter noise with his ’89 750iL. He wrote a story about it , took some photo’s and gave […]

Article by: Sean Article applies to: all models with the M70 V12 engine. Problem: The last couple of months my V12 developed a rough idle. These engines can run like sewing machines, but not in my case. More like a 2-stroke chainsaw…first I looked for the obvious problems. Vacuum hoses, […]

Article by: Johan Article applies to: all e32 and e34 models. Problem: The fuel gauge on my car was erratic in the last 40 liters. The last 20 where the worst. The needle would fall from 20 liters to 0 and go back up to 20 in 2 to 3 […]

Article by: Sean Applies to: all e32 and e34 models. The six cylinder has one pump, the eight and twelve cylinder models have two pumps. This procedure describes the V12 pump replacement, but I6 is basically the same. Problem: One nice day, just when I thought I had driven about […]

Article by: Sean750 Article applies to: all e31, e32, and e38 models with the M7x V12 engine. Problem: The last couple of months, I’ve been trying to investigate the cause of a lack of fuel pressure. The problems are numerous: erratic idle, surging, hunting (this is typical: engine revvs and […]

Article by: Sean Article applies to: all models with the M70 V12 engine. Problem: In my ongoing quest to fight the problems with rough idling, stalling when accelerating and surging I decided to replace the fuel filters to see if makes any difference. I was still convinced it had something to […]