My 91 E34 M5 not starting ... some advice on what to check?

[Mark Rousseau]

Hi everyone,

My 91 M5 is in great shape, but I only drive it about once each month. Recently it started fine then sputtered and stopped after a few minutes of driving. It would then turn over but not start. I waited a few days, then it started just long enough to get it back in my driveway. Since then it turns over fine, but does not start. There are no engine codes showing. Could you suggest what I should check? Some of the research I checked suggested the "crank position sensor" ? Maybe the fuel pump? Thanks for helping!

Mark Rousseau

91 E34 M5

Toronto, Canada

[Mark Rousseau]

Thanks everyone for your advice on this issue over the past week!  I'm going to check and clean the ignition system, fuel flow, and the MAF ...... many suggested the crank position sensor, so that's at the start of the list. Also, I have an older Clifford Alarm which shuts of the fuel if the alarm is triggered, so I think I'll remove the alarm in case it is causing a problem now or maybe in the future.

FYI, I've recently stopped working (some call it retired :-) after 40 years, so travelling shortly to Australia, New Zealand and Japan.....I'll report back to everyone in a few months once I solve this.

all the best, 

Mark Rousseau

91 E34 M5

Toronto, Canada