68 327-i have had stumbling under load off and on for about 4 months now. ive changed the fuel filter, fuel pump, air cleaner, pvc valve, carb, plugs, plug wires, distributor, coil, exhaust gaskets, adjusted the timing and replaced the vacuum lines all to no avail. any other simply checks i can make as a relative novice before i break out the sledge hammer?
Josh, did the engine just get rebuilt or a new cam installed?? Maybe, maybe a cam out of time by a tooth, possibly a flat lobe or lifter out of adjustment.
Another friend just had a brand new engine that only had 7 cylinders, from the valve aadjustment man flubbing up. Adjusting the valves (hydraulic cam) cured that particular problem, lets work on yours now.
Could also be a vacuum leak, please post just which intake manifold and carb you are using. What engine size and other mods, please.
no recent rebuild or cam. its the original 327/210 that came with the camaro in 68. over the last 10 yrs ive put in a cam (with the 327/350 hp specs), world sportsman heads, eb performer intake, universal 600 holley (changed to the original QJET and had the same problem.) the only thing new that was put on 2 months before the problem was
a TCI 2400 stall speed converter.