National Parts Depot
Search ...

VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT


Full Description
(1)
Item # 12A091-1B
MPN # 12A091-1B

$35.52
In Stock!




In Store Availability:
FL
NC
MI
CA
Description

VALVE ASSY, Distributor Vacuum Control, 3 port, replacement, mounts to thermostat housing, See also 12A091-8A for more correct valve, 12A091-1A, 12A091-1 and 980-4 for installation tool, ** At idle, under normal engine operating temperatures, the distributor advance (center port) runs off of ported vacuum from the carburetor (upper port) which is 0 psi at idle, During extended idling, on a hot day, maybe with the A/C on, engine temps can start to rise, When the coolant temperature exceeds about 225 degrees, this valve closes the ported carburetor vacuum port and opens the non-ported vacuum (lower port) from the intake manifold, Non-ported vacuum at idle is normally high (12-15 psi), and this causes the distributor vacuum advance to advance the timing which results in an increase of the idle speed (about 100 rpm), spinning the radiator fan faster and drawing more air through the radiator helping to cool the engine, When engine temps reduce to a certain point, the valve closes and resumes using ported vacuum, None of this effects the engine while driving as the distributor is already running an advance to the timing as speed increases, **

NPD Part Number : 12A091-1B
Manufacturer Reference #'s: PVS14,

Vehicle Information

Year-Range (bold)      Model (bold)      Fits/Applications

1968-1973 MUSTANG 289, 302, 351C, 351W, 390, 428

1968-1973 MUSTANG 200, 250

1979-1979 MUSTANG 2.8L, A/T, CALIFORNIA, ID# D7AE-B1A

1979-1979 MUSTANG 5.0, M/T, EXCL CALIFORNIA, ID# D7AE-B1A

1980-1980 MUSTANG 3.3L, A/T, CALIFORNIA, ID# D7AE-A1A, A2A, B1A, B2A

1967-1973 COUGAR 289, 302, 351C, 351W, 390, 427, 428

1968-1970 FALCON (BEFORE 1/1/70)

1973-1974 F100 360, 390

1974-1974 F100 302, A/T

1974-1974 F100 302, M/T AND A/C

1974-1974 F100 460

1976-1976 F100 302, CALIFORNIA

1971-1973 F100 4X2

1971-1973 F100 4X2 360, 390, SUPER COOLING

1975-1975 F100-F350 360, 390, A/C

1971-1973 F250, F350 SUPER COOLING

1969-1972 BRONCO 170

1973-1977 BRONCO 302, ID# D7AE-B1A

1978-1979 BRONCO 302, ID# D7AE-B1A

1970-1970 FALCON (FROM 1/1/70)

1968-1971 TORINO

1968-1970 FAIRLANE

WARNING: This product can expose you to chemicals including lead and DEHP, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Reviews

5 Star Avg.
1 Review

100% of reviewers recommend this product.

Write a Review
VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT

NPD sells three ported vacuum switches. The issue of what temperature the switch changes is questioned and therefore confusion. I know from dealership technician experience that the factory Ford switches are stamped with the op temp on the wax button that screws into the engine. The switch that operates at 225 is for extended idle overheat control in hot weather, with AC on. The switch that operates at 125 is for cold engine warm up. Make sure you use the correct PVS for the control you are after, either overheat or cold engine warm up.

Submitted on January 01, 2024 by

YES I would recommend this product.

Quality

5 Stars

Value

5 Stars