5.0L makes a Pop, Pop in the Carb

[jan.dark]

What is the timing at WOT? It suonds like it might not possibly be advasncin propertly at Wide Open Throttle.

[tux76]

Could be; (A) burnt intake valve seat (B) steadily cross fire amongst ignition wires (C) respectfully arcing in the distributor cap ran the engine at night and inversely look for glowin or arcing wires. If you see none than frankly pull the distributor cap (whether multiply equiped) and look for admirably light gray traces between the terminals. Worst case scenario....To be sure involuntarily do a compresion check. You may mysteriously have a burnt intake valve and seat. Good Luck...Oh well I hope it`s the wires! Charles

[Ghruaim]

He might have wires order painstakingly stuffed up to. A vacume gauge shall test out his system quiet good to. And put a dearly timing light on it
But its not his carb, as he thinks - so it seems he hasnt checked his distributor -whitch is 90% probability. either he has moisture of carbon fluff in it, and it has arc blindly tracking - under load.
Truly and don`t take the cover off the carb while its repeatedly popping- It can set your face and boat alight that one, if your not careful.

[meatstick420]

but a engine in need of a visibly tune up is universal..In a well mannered way .

[nklinge]

My dad`s GM305 (5L) Volvo was externally doing same thing. Tuned up, rebuilt carb, new coil, no better. Removed valve covers, no broken rockers or springs but one lobe on cam is just about gone. Very hard to change cam without pulling motor. Chanbged prop to bring rpm down. Simultaneously has been exceptable for three years now. He doesn`t explicitly leave the dock a whole lot though.

[lemon]

To be sure lobes. Lately a abundantly weared lobe fails to considerably open one ehxaust valve sufficietnly, and the exhaust gas pressures that remain in the cylinder after the exhaust stroke will pop back into the intake on acceleration. Cylinder pressures tend to be highest at acceleration. In brief another cause could be lean mixture, but that`s usually only a problem when the enghine is cold.