1986 260e. It is a grey import from Germany. M103


The last few days I've been noticing a little hesitation and a misfire. This morning it started getting a lot worse to the point where I was stuck at a light for 5-10 seconds hesitating, then it would clear up and go just fine. It got to the point where it would completely stall. It would restart and go for another minute then die again.

Currently it will start and idle just fine. The second I put any pressure on the throttle it will start missing (almost like running on 3 cylinders) then completely stall. No amount of throttle will keep it running.

What iv done so far : pulled the plugs; they are perfect. Noticed the wires were on their last legs so I replaced those, cap and rotor (Bosch for all three), but it has made no impact.

I can hear the fuel pump turning on when I turn the key , and it turns off like usual (when pressure is reached). Temperature does not seem to make a difference. It does the same thing hot or cold.

It's currently still in the parking lot where I left it.

Any suggestions?

I was thinking possibly crank position sensor. Anyway of testing this? But would it idle if it was gone?

(I will post a video when I get home later tonight)

Thanks in advance.