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Old 03-19-2010, 12:10 PM   #1
bigdave17
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351 windsor vacuum lines

does any one know where the yellow vacuum line goes on a 1990 bronco 351 windsor its the one that is close to the vacuum container that has the red & black line connected to it.
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Old 03-19-2010, 12:30 PM   #2
DGW1949
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Bronco Info: 1989 4X4 351W C-6 3.54/3.55
The factory vacume-route diagram was missing off my ('89) truck when I bought it. Some of the line-colors have become faded over the years and I have since changed all the rubber hoses, so none of mine have the original color stripes.
Having said all that, I THINK that the plastic line you are describing goes to the plastic valve which sits next to the passenger-side (RH) exhaust manifold, which is part of the thermactor pump hose routing.

If that don't work, and if no one else pops in with a better answer, try to post a photo.

Hope this helps.

DGW
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Old 03-19-2010, 01:42 PM   #3
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Bronco Info: 1990 EB FSB, MAF, 6.7L, E4OD, 4" Rancho, 4.56, 33" on 15x10 Alcoa's
On my 1990 ex-5.8L, the Yellow Vacuum Line goes from the TAD Solenoid (driver's side forward solenoid) to the TAD (Diverter) Valve located at the rear of the Intake Manifold. You have to climb up onto the engine to feel the Diverter Valve or remove the Intake Manifold.



The Pink Vacuum Line goes from the TAB Solenoid (driver's side rear solenoid) to the passenger side (adjacent to the Vacuum Reservoir Can) and down to the bottom of the TAB (Bypass) Valve. Note that my Pink Vacuum line appears Yellowish in this pic and is not yet connected to the base of the TAB Valve as I was working up a solution at the time.



Here is a pic of my VECI (Vehicle Emissions Control Information) Label for a 1990 5.8L Bronco. Be advised that the ACV (Air Control Valve) is the TAD (Thermactor Air Diverter) Valve and the AIR BPV is the TAB (Thermactor Air Bypass) Valve. The VRESER is the Vacuum Reservoir Can where the red & black vacuum lines plug into and the EGR is actually the EVP (EGR Valve Position Sensor).



I hope that this helps!
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Old 03-20-2010, 12:15 AM   #4
bigdave17
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Thanks man good info ! this helped me out a lot.
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