Oil on my intake valve???

[mkweaver]

Vehicle: 1996 Chrysler LHS (3.5 Liter V6) Symptoms: runs rough at idle - no check engine light. I took this to a mechanic who told me the problem was a leaking intake manifold gasket. Since a gasket set costs $6 and the shop wanted 2.5 hours labor to replace it, I decided to do it myself. I now have the intake manifold off and looking in the intake runner I can see what looks like oil puddled around the rear intake valve (driver side rear cylinder). I rolled up some paper towel and reach in to sample the fluid. After letting it dry for a few minutes I put a match to it. It didn't flame up as quickly as I would have expected gasoline. Assuming this is oil and not gasoline (from the removal of the fuel rail) I see only two sources - a leaking head gasket, or shot valve stem seals. Does it seem I am headed down the right track here? If so, is there a way to isolate the source of the oil short of removing the head? Any pointers are appreciated. Mike

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[mkweaver]

False alarm - it turns out I was seeing gas from the removal of the fuel rail. When I went back to look it had dried up.

I didn't want to have to remove the head.

Is there anything else I should do while I'm in this far?

[anwaypasible]

clean the injectors?
have the injectors tested for flow?

what are the chances one injector spits out less gas on purpose to keep the engine balanced?

i would clean the injectors at least.. probably not much else that can be done except test the injectors for flow compared to stock (or a new one).