I've been having spark know troubles, went to replace the MAP sensor, found oil in the vacuum line. Possible sludge problem causing the oil not to return to the pan, and causing an overflow into the vacuum lines. I'm going to pull the valve cover to see if the valves are sludged, any other suggestions would be great.

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1994 F-150 4X4 Regular Cab, 302 EFI, 5 spd. K&N Filter, Gibson Super Truck Split Rear Exhaust

 

Before you go to extensive work and time, when was the last time you replaced the pcv valve? Did you look into the knock sensor?

 

Pastmaster,
I got a new knock sensor, I having trouble locating where the old one is. I am going to replace it no matter what. Let me know where this is located.

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1994 F-150 4X4 Regular Cab, 302 EFI, 5 spd. K&N Filter, Gibson Super Truck Split Rear Exhaust

 

Pastmaster I forgot to mention, I just changed the PCV valve less than a month ago.

 

Mine is ontop of the upper intake manifold, it should have several lines coming out of it. one goes to the power brake booster, another one goes to a t-valve, and one should be capped.