I've finally got my 280 sl project back on the road running beautifully. I found a great mechanic that has 40 yrs experience with these cars but he's expensive! I purchased a rebuilt fuel pump and had it tuned to the car with him. However, the pump developed a few leaks so I returned it was replaced with another rebuilt unit. Everything worked fine upon replacement. I took the car out last weekend for a long cruise and it started to develop - what I will call a miss- at all rpm levels but idle. So if I was running along at any level of acceleration other than a very very light throttle, I could feel the shake. Even at hwy speeds, smooth at a very light throttle, then a constant almost shutter under any load. My pagoda is a 1970 and has a new factorytransistorized ignition. I have new plug wires, and tune up parts ordered and coming in hoping that Its ignition related.plugs are bright white, slightly brown and dry.
It almost feels like once I go past a very light throttle, I'm working against a rev limiter. I've read about almost similar issues here on this board with the fuel shut off solenoid. The throttle linkage has been adjusted by my mechanic. The car ran perfectly then about an hour in, the shutter began. Any ideas of things I should look into other than ignition? Thanks. Rob