Last fall I fogged my engine (NA 502)...I guess "super fogged" would be a better description. I finally got around to first start-up yesterday and it never cleared all the oil from the cylinders after running for awhile. So I'm going to pull the plugs and clean them before my next try. I'm wondering if there is something I can spray in the cylinders to help clear or thin out the fogging oil without f-ing up the engine. As usual all help/suggestions are appreciated...thanks

I would think anything you would spray in the cylinders that would help clean up the oil is also going to strip the oil off the cylinder walls. I would put new plugs in and fire it back up and run it.

That's what I was thinking, but I just wanted to check/see what someone would do...thanks

I'm pretty sure that your problem is not leftover fogging oil in the cylinders. What you more likely have is a fouled plug (or three) which is leading to it running rough. Pop a new set of plugs in and they'll fire - cleaning everything else out.

You sure you don't have a stuck choke, sunk float, etc. that might be causing it to run rich?

Too Stroked...I just put new plugs/wire/... everything ignition last season. I'll try cleaning them 1st and if that doesn't work I'll go with new plugs. Thanks for the input.

Knot 4me...I don't have a choke and I rebuilt the carb (holly 4150) last spring so never thought about it having a problem and the its firing thats a possibility. I'll check the float/needle to make sure its working ok. Thanks again

Yes, but you fogged motor at end of season with those plugs in them. New or not, they can still foul. Good luck

Absolutely...didn't mention this before because I thought it was just being caused by the mis-fireing, but my fuel pressure gauge was jumping all over the place...I mean the needle was a blur. Never done that before. Would the mis-fire cause that?

Talk more about the fuel system. Does it have mechanical or electric pump. Is there a regulator, if so is it return style. Are you visually looking at the carburetor while running. At idle you should not see any fuel dripping from the boosters, if fuel pressure is to high it may overflow the vent tubes, if a power valve has failed fuel will drip from the boosters while idling. I doubt the fogging oil is causing any problems, how much did you use and how did you use it?