Hey Sari - maybe you could help here (archive)

You might also ask Sari for his advice - he had a similar problem, but he described is as hesitation like the car would lose power for a moment. I suggested in might be a loose or bad coil wire or plug lead - it turns out he had a leak in one of his hoses, not sure which one. Hopefully he'll see this and respond.
Good luck.
M.

Folks, My 84 528e just started bucking intermittently on the highway yesterday. I checked the archieves and the fuel pressure regulator and pump issues didn't seem to match my probs and I'm stumped.

Starts great. Idles fine. Has power. Outside temp ~ 40 degrees f, no rain.

Bucking occures at all speeds, cruise or no-cruise and all fuel tank levels.

Just one or two (maybe three) bucks, then runs fine for 5 mins, then another buck or two, then 10 mins more, etc.

I could duplicate the bucking by tapping/punching the accelerator and quickly letting off.

Seems like a split second loss of fuel.

Any takers?

Thanks in advance

Tom
84 528e 197k

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