"I have a 1993 four winns sund
"I have a 1993 four winns sundowner with a 5.8 liter (351 ford). It has the spitfire ignition with a 4 barrel.
It runs perfect at an idle and when going thru the harbor at 5mph. Once I get it up on plane and above 3000rpm it starts to ping then back fire thru the carb.
I have replaced the fuel filter/seperater twice. I have also replaced the anti syphon valve as well as rebuilt the carb. I just recently changed the cap and rotor and today I took it out with the same proplem. The old anti syphon valve was clogged and I thought that was it,but no. Need help."
"I have a 1993 four winns sundowner with a 5.8 liter (351 ford). It has the spitfire ignition with a 4 barrel.
It runs perfect at an idle and when going thru the harbor at 5mph. Once I get it up on plane and above 3000rpm it starts to ping then back fire thru the carb.
I have replaced the fuel filter/seperater twice. I have also replaced the anti syphon valve as well as rebuilt the carb. I just recently changed the cap and rotor and today I took it out with the same proplem. The old anti syphon valve was clogged and I thought that was it,but no. Need help."