I have an 88 F250 4x4 XLT Lariat. It's a 5.8L 351w automatic. It's a vacuum nightmare. Is there some sort diagram out there for hoses? I just recently bought this truck and there are more hoses plugged up than I can believe. It's a miracle it still runs. Lol. I need some sort of diagram showing what goes where.

 

Me too! Same deal! I wanna go in there and hack all those lines out of there...whats up?? Would love to see some feedback on this post!

 

I resorted to doing it a different way. Go to your vacuum tree and rig a fog machine to your spare port. Make sure the engine isn't running. Turn the fog machine on for 2-4 minutes. You will see where it comes out, those are your leaks. After you are done rig an air compressor or simple bike pump up to that same port. shoot some air through the system to push out the leftover fog. Have fun!!

 

You would think with just a crate motor swap I would be able to get all the hoses back in their right spots, but no. Does someone have a ledgible vacuum diagram for the '88 F-250 351W 4x EFI?