Posted by Ken McClean (184.108.40.206) on July 25, 2004 at 22:47:37:
1978 Atomic 4. I have an unusual engine problem where the engine starts up and runs fine. In idle it will rev up to 3500 rpm or higher. Under power it will not go higher than about 1500. The throttle can be advanced as far as you like but the engine tops out at about 1500. I have cleaned out the carb, spark arrestor and replaced the fuel filter and pump. Blown air back through the gas line to the tank and all seems to be clear. I'm at my wits end. Any suggestions would be greatly appreciated.