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Low Speed Miss

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  • Low Speed Miss

    I have a 1972 Ford F100 with a mild 351W. AFR heads, mild cam, and FiTech EFI with MSD 8584 locked out Billet Distributor. At low speed just pulling off and cruising I have developed an erratic miss. Not consistent like a dead hole. So far I have replaced plugs, plug wires (found one bad wire), coil, distributor cap, verified timing is correct and verified the phased rotor is correct. Also checked to make sure this is not a lean condition problem. Monitored AFR & Lambda and all seem to be OK. I've added fuel just to see if it would make a difference but no difference. The link is the distributor that I have. Could this be a distributor issue? Barry
    For Ford enthusiasts that are serious about performance! Just under the brass terminals of the MSD cap and rotor is an easy-to-adjust mechanical advance assembly. The assembly is fine blanked from chro-moly steel, TIG-welded for strength plus receives a QPQ coating. The precision weights glide on nylon bushings for smooth advancement and different springs and stop bushings are supplied so a variety of advance curves can be tuned. The steel shaft that spins the advance and reluctor receives a friction reducing coating plus is guided by a sealed ball bearing and long sintered bushing. This combination provides stable timing signals and spark delivery at any rpm. Triggering chores are handled by MSD's race proven, maintenance-free magnetic pick-up.