I have a 1967 Camaro all restored back to stock condition. The motor has 900 mile since a complete rebuild. The carb is the original Q-Jet that is rebuilt. When I drive the car, it starts great, idles great, runs under normal conditions great. But when it is time to have fun and put the acclerator down, the engine will sputter and lose all power, almost like there is a rev limiter or something. Yesterday, at about 3500 rpm in third with the accelerator floored, it lost all power, but the motor did not die, it sounded like it was just idling. It would not respond to the accelerator pedal at all. I turned on a side street and a few seconds of just idling and I was on my way again. Again, this occurs ONLY under full acceleration and ONLY above 3500 RPM or so.
I thought that the car may be running out of gas with the secondaries open, so I installed a larger needle and seat and hi-flow fuel filter but that did not help. Would you guess it is still in the fuel system somewhere? The coil giving out at higher rpm? The coil arcing maybe? The distributor doing something weird (I have not gone through the distributor yet)? Or something else? If there are any steps or tests you recommend, I would really appreciate it. Thanks in advance.