It's a 1982 244, which I've swapped in the running gear from a 1988 740 turbo.
It's been running fine until today, if I accelerate slowly, it's a bit noticeable, and if I floor it, it'sjerky and hesitates a lot. It's like a fuel supply issue, but I'm sure it's not. It seems to idle fine, and it's builds low boost.
Checked for air leaks, checked the FPR, checked all connections, everything seems OK.
Any suggestions?