Fouling spark plugs
08-17-2009, 02:17 PM
#11
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Enforcer, have you solved the problem ? If not, how many hours are on the engine ? Had you ever had the carb off ? (rags or restriction in intake) Have you checked valve lash?
What is oil pressure @ idle and run ?
It sounds like your valve trane may be a problem.....Week lifters, valve lash, flat cam, rockers.
Let us know what you find when you find it, Please.
What is oil pressure @ idle and run ?
It sounds like your valve trane may be a problem.....Week lifters, valve lash, flat cam, rockers.
Let us know what you find when you find it, Please.
08-17-2009, 09:38 PM
#12
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If you are only fouling those 2 cyl, I'm betting it's oil, bet the guides/seals are killed on those cylinders...have seen that issue before...any head work been done ? Rob
08-19-2009, 08:04 PM
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Hi guys I have got a on going problem for a year now with no answer or any ideas left. My starboard engine (454) is dry (carbon) fouling spark plugs in cyl. 7 and 8. It will foul MR43T's in minutes MR44T's in hours. However it seems that if I am hard on the throttle it is not near as bad, if I cruise at 3500 RPM they're toast. I have changed the rotor, cap, wires, and coil. I checked my compression and its fine. I swaped my carbs thinking I was over fueling no good. I have no oil loss and no smoke from the engine. The thing will misfire and run like crap I will replace those two plugs (7&8) It will run like a raped ape then I slowly loose rpm's till it misfires I'll replace those plugs and go like hell again. By the way It has a prestolite ignition. Any help would be great. Thanks, Barry.
