I have a 75 280
I've just fitted Throttle bodies and mapped injection along with a whole lot of engine work/mods
A success pushing 245 bhp but every so often (well more often than not)) it holds back momentarily and surges back and forth as if it's losing fuel pressure. However it runs fine on the rolling road when the car is stationary
So....What is in the tank that could possibly be interrupting the fuel delivery? Something come lose maybe?