duff

ALL EIGHT INJECTORS HAVE BEEN REPLACED - INJ. PUMP REPL. - RUNS FINE AROUND TOWN - AT HIGHWAY SPEEDS STARTS TO RUN ROUGH SMOKE HEAVILY LET OFF ACCEL. AND SLOW DOWN CLEARS OUT AND SOME ROUGHNESS

I have a 1992 e-van non turbo under hard accel. vehicle will start to knock - missfire - heavy smoke blueish in color - after coming to a stop smoke will stop and motor starts to smooth out -runs fine at normal driving. fuel pressure at filter adapter 4-5 psi idle raise rpm drops 1-2 psi - return line has 1-2 psi at 2500 rpm - attempted to crack fuel lines at injectors to find missfire they all seem to drop same rpm and good fuel flow -- during idle - any ideas for further testing possibly fuel pick up intank plugged ? thanks

have f450 p0308 - missfire cyl. 8 - cycle key off restart runs fine until engine load then starts missfire until key cycle - injector was replaced - wire harness test fine

INTERMITTEN STALL ON DECEL WARM - NO CODES - IPR REPLACED AND CAM SENSOR DUE TO CAM CODES EARLIER - INSP. HARNESS FOR CHAFING AT SHOCK TOWER - STARTS RIGHT BACK UP GOOD -