I've cleaned flame trap, hoses, small fitting in intake manifold (was plugged), checked fitting in front of throttle body. I also removed oil seperator and checked (not plugged). When I plug one hose on flame trap and blow into other I find I can blow through flame trap into crankcase but flow seems pretty restricted. Can hose inside of crankcase be plugged? When I do jiggle test it seems like crankcase has no vacumn at idle but does appear to have vacumn with a little throttle. At any rate still seeping oil out the filler cap on valve cover. Thanks in advance for all your suggestions.

R,

>I've cleaned flame trap...

Have you actually replaced the old flame trap? Looks can be deceiving after cleaning. The surface of the multiholed flame supresser might look clean but have you tried pushing a probe through the holes to see if they are clear?

For the heck of it, I tried to 'clean up' an old flame trap by drilling into each hole to unclog them. I burnt up two drill bits before I gave up on that misguided experiment. That condensate must be made out of pure carbon. If it were any harder, you could make jewlry out of it.

The part is cheap. Try a replacement before you continue your diagnostics.

Good luck

I would go ahead and replace the oil separator. I have my own system which results in no pressure, no vacuum. One of my hoses was slightly kinked and I lost all kinds of oil out the main seal, so, I think it needs a very easy-flowing PCV system, especially with the blow-by from an older engine.

Rene

I haven't seen other posts concerning your problem, but you have replaced the gasket on the filler cap...... right?

Randy

I tried all the tricks too + advice online always included 'possible blowby prob.' meaning '' rering the pistons'' thats what i did +'wow' i even have eng. vaccuum. easy to do if you have a comalong or hoist req. pull eng. to get oil pan off.