PCM Removal in 92 to 96 bossind @ Changing out the Bronco Computer ECU
My Vacuum Leak Diagnosis in post #11
You should obtain a vacuum gauge. Some mom & pop parts stores may loan you one with a security deposit.
In the diagnosis you will see a Vacuum Gauge Diagnosis by Ford.
Call dealership and have Service Manager ask technician where he found the leak. Chances are that he just used the vacuum gauge check & found
"INTAKE LEAK: A low, steady reading can be caused by an intake manifold or throttle body gasket (TB gasket) (9E936) leak."
Also, IGNITION TIMING RETARDING: Retarded ignition timing will produce a steady but low reading.
I believe your 94 5.8 was built with two catalytic converters. I forget where you are located; it makes a difference for Emission tests especially in California and and New York State.
CARB Converters Last Updated 02-01-2017
In California (as of January 1, 2009) and New York (as of June 1, 2013) it is illegal to install a required CARB-compliant catalytic converter based solely on physical shape, size, configuration, or pipe diameter.
By law, required CARB-compliant converters must be installed specifically as listed in this catalog, they cannot be substituted nor can they be installed on vehicles that are not listed in this catalog.
If you do not reside in California or New York, and do not require a CARB-compliant converter please use our EPA Applications Catalog.
NEW YORK: Determine the RIGHT replacement converter.
For more information on New York state regulations click here.
1994 - Ford Bronco
Engine - 5.8 Liter V8
Vehicle Qualifier Notes Location Product Line Part QtyQuantity Required per Vehicle
Legal for use in the states of California and New York.; Modifications and/or additional parts required. Front Universal Click Part Number for Product Information Page 80612 1
Legal for use in the states of California and New York.; Modifications and/or additional parts required. Rear Universal Click Part Number for Product Information Page 80708
Notes show that Neither have air tube tubes.
From what I recall, your air tube should be in the Y.
See Walker Exhaust for info on non CA and non NY State @ WALKER® EXHAUST SYSTEMS :: E-Catalog Lookup