Alright....I changed my two fuel filters and the primer pump. I still have an air bubble in the prefilter and I still have an idling problem.

Like I said, I Idle right around 600 immediatley at start up, then If I rev at all it settles to a nice 750. Problem is after its been up on the highway and comes back to park and idle it sits at 900. WTF! Can all this be explained by the rack damper?

Also...about the air leak in my fuel line. Where else should I be looking? Somethin makes me feel like I didnt tighten that primer pump as much I need to, but its very hard to get at. I do need some better tools.

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1983 300SD White with Grey interior