I have a 92 400E with a replaced wiring harness that has always run fine. Recently as I accelerate the power will suddenly cut out for a split second, come back, then cut again for a split second.....on / off / on / off..until I reduce the power. Then it drives fine.
I has a new harness, distributors and rotors. It feels like the ignition or fuel is cut then returned. No codes.
It doesn't run rough or misfire, it quits...then comes back and if I keep accelerating it keeps doing it until I relax the accelerator.
Any ideas ?