rebuild egr sys om 85 F250
 

I've recently purchased an 85 F250 and all the vacume lines have been removed and plugged off and obviously it doesn't idle well but it runs great.It has a 302 EFI.
I need to know if anyone has a diagram of these lines and their sensors.

Thanks,
bmlewis@mtneer.net

rebuild egr sys om 85 F250
 

Chilton's "1976-86 Repair Manual" has some good vacuum diagrams. When I converted my 300 I6 to a 351W, I checked out junk yards and took pictures of the engine bay and the little color coded chart located on the front near the radiator. I then figured out the minimum that I needed to do and eliminated probably 60% of my vacuum lines. On mine, I first made sure that I had the smallest diameter orifice in the EGR, I then ran my vacuum from the EGR to the temp sending unit on top of the thermostat housing (I got the highest temp switch available to keep the circuit closed as long as possible), then ran from my temp unit to a vacuum source. The only other vacuum lines needed are from the vacuum sources to the distributer, transmission, and brakes. On mine, there is a manifold mounted to the firewall with one circuit running to the tranny and one other circuit running to the passenger side of the truck to operate some of the baffles for heat/AC. There is also a vacuum switch that you can put in line between the carb and the carbon can that would close this circuit under acceleration. I haven't put that one in yet.

Slik

rebuild egr sys om 85 F250