need help with sluggish 420SEL
I have a 1987 420SEL, 83K, that is idleing rough and stuttering/stalling on accel from a stop. Fuel pressure is a steady 90 psi. Compression is good. I have replaced distcap/rotor/wires and plugs, but no improvement. Once it gets going, it's perfect. Any hints or ideas would be appreciated.