Engine Performance problem
1986 Mercedes Benz 560sel V8 Two Wheel Drive Automatic 163000 miles
I have fuel pressure into the fuel distribution block on top of the throttle body and the cold start injector is getting fuel pressure. Also have changed fuel shutoff onside of throttle body ( little black box with plug ). I know that the fuel distributor is good and I have 3 of them. I have changed over to all of them and all do the same, no fuel to any of the injectors except the cold start injector. What could be the problem?