Fairly new Benz owner here. I have a 1983 300d, when I bought it it started immediately with no pedal every time, ran great, pulled out really well and generally was a blast to drive.

I ran one tank of B20 through it and discovered that the gauge wasn't quite accurate while it still said I had fuel it appears to have run out. I put in fuel and primed it with the manual pump and it did start but I have been having problems since.

It usually wont start cold unless I hold the pedal all the way down. Once it starts, it barely runs, no power for a bit until I get it moving. Once it moving it starts to pull out again and does fine on the highway. After it warms up again it's hit or miss. Some times it runs like it did when I first got it, other times it dies at stop lights and takes for ever to get moving again...then everything will bo ok.

I've replaced both fuel filters and I can see fuel getting into the first filter.

Ideas on tings to try next?

__________________
1983 300D
1978 BMW R80/7
1997 Jeep TJ