Quote: The Magnum engines have a plate bolted to the bottom of the intake plenum that can leak oil into the intake tract. The TBI intake does not, pointing it out for anyone trying to follow along at home.
I was thinking more on your problem at lunch today. The TBI system is fairly stupid, in the sense that it cannot sense or pop a fault code for a lot of stuff that today's smarter systems can and will.
I wonder if capping off that leaky EVAP line for testing purposes will affect your symptoms. I do not know how and when that line purges. But it almost sounds like you have a vacuum leak somewhere the system cannot compensate for adequately.
Interesting. Could give it a shot. Also. I've been driving the truck around and when I got under to check out the EVAP situation I saw that I've got oil leaking from the rear of the engine.
