I have an oil leak that migrates to the back side of the engine and across the tranny pan. I read on a 4th Gen website that this is a symptom of intake gasket gone bad; any experience out there on this?

I also Idle way too high. Is this the throttle position sensor going bad?

If I am going to be tearing into the Intake Manifold and TPS, what mods would be the best bang for the buck while I am in the top end of the engine?

 

Check your EGR valve. Oil can leak from the gasket going bad, and can cause a vacum leak that would explain your high idle.

 

Thanks. I'll Check it out.