/6ers, I appreciate all the suggestions and help.
With improvements made, we're not yet 100%. 1978 volare 225 super six with automatic, still bucks while in cruise or just trying to maintain speed. Seems while in third only. Under load in 1st or 2nd or while accelerating, everything seems fine. New, autolite plugs, wires, new cap & rotor and NOS dizzy. reman carb, new reman head, Intake exhaust manifolds plained. Valve lash set, though not rechecked. new fuel filter and fresh gas, new air filter, new electroinc moduel, new resistor, new belts, vacuum hoses. Timing reset to 12' btdc, New thermostat, new antifreeze, oil, filter. New battery, New tires, brakes, shocks even new U joints. Geez this should cover it.
Though I probably left something out. 54k on this Volare of Grannies
Items Not yet changed, fuel pump, catalytic converter, muffler.
The NOS dizzy from Old Car parts NW arrived, and is set smack on .006. I found the reman Dizzy's pick-up I had on car was gapped at .010. I also found a small vacuum leak in vac hose for the power brakes.
I have yet to return to the original rebuilt Carb. Fuel pump? Now this is the one item that I have not changed. I seem to have plenty of fuel, but maybe as suggested the diaphram is weak.
Under load or while accelerating the 225 operates fine, yet seems as if its being held back a little. What remains puzzlings is this bucking & kicking once up to speed in third. This can be at 27, or 65 and anywhere in between. Once in third, she bucks. Floor it and it improves immediately.
Much improved with the NOS dizzy set to .006 and timing set to 12' BTDC.
One friend says we need to determine if harmonic balancer has slipped. Why on earth would have the previous young mechanic have advanced the timing to 20' BTDC? . I was then thinking, could have the young fellow set the valve lash wrong, possibly mixed up the back 6 valves forgetting, the two intakes in the middle & then valves reverse sequence. ei,ei,ei,ie,ie,ie? But would this not effect operation up all the time? not probable?
I will try the fuel pump as its the last item remaining. I have good spark on all 6 at ideal. Could I have possible got a bad electronic moduel? but would this effect firing operation all the time? There is no more pinging now that timing is set. It appears I had or have a multitude of issues to resolve and iron out. I am still open to suggestions. Will change the fuel pump as suggested, put the rebuilt carb back on, though doubt it will change anything, check the harmonic balancer for slippage and if all that fails maybe even try another new electronic moduel. Still stumped!
