'66 200 I6, C4, autolite 1100 (newly rebuilt), new fuel tank, filter and pump, DUI dist upgrade with full 12v feed (has manifold vac & the carb ported vac from SCV is capped off), timing advanced slightly (peppy and no pinging), plugs gapped at .045 (all plugs burn color is good), tuned with vacuum gauge at 20 steady. It runs really well until i get above 55 mph and it sputters. I can let off and it smooths back out after a couple minutes just cruising around 45.
Could the advanced timing cause this? New fuel cap not vented properly? Not enough fuel in carb bowl which would need a float reset? Is the dist, being hooked up to manifold vac correct? Any ideas will surely be appreciated.
PS I am leaning toward a float level reset for more fuel in carb bowl
Could the advanced timing cause this? New fuel cap not vented properly? Not enough fuel in carb bowl which would need a float reset? Is the dist, being hooked up to manifold vac correct? Any ideas will surely be appreciated.
PS I am leaning toward a float level reset for more fuel in carb bowl