1. Have you checked for any diagnostic trouble codes?
a list:EEC-IV Quick Test & Diagnostic Trouble Codes (DTCs) 2 digits, for Ford 84-88 by tomco-inc.com
Also, Scroll and look @ A.I.R. Injection Tubes - is this it?
2. Look here and let us know what pic is what you see:
go To Emission is index, scroll...
3. the tube, is this it? http://www.pciinc.com/partdetail.cfm?pn=109
if ot, look through their Application search for it.. a good company that will reply to an e mail promply!
Ford OE Replacement Catalytic Converter Air Tubes
109 Ford Air Tube - Crossover With Threaded Stub
85-95 Ford trucks, including: EFU 150/250 Van, Pickup, Bronco, EFI, 302 engine.
Replaces O.E. E7TZ-9B449-A and O.E. F6TZ-9B449-F
Complete with two #56 gaskets.
Use with #37 valve.
Similar to our #41V but has threaded stub.
Retail Price: $33.96
Connects to Air Check Valve
our's rusted out on the 96....