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VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT


Full Description
(8)
Item # 12A091-1
MPN # 12A091-1

$14.95
In Stock!




In Store Availability
FL
NC
MI
CA
Description

VALVE ASSY, Distributor Vacuum Control, 3 port, replacement, mounts to thermostat housing, has correct aluminum body that is close to the original without the original markings or finish, See also 12A091-8A for more correct valve, 12A091-1A, 12A091-1B and 980-4 for installation tool, ** Note: We have found that most of these valves are activating at around 125 degrees instead of the intended 225 degrees, What does this mean? 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 : 12A091-1
Manufacturer Reference #'s: C8AZ-12A091-A blue, MY-126, C8AZ-12A091-A, D5VY-12A091-A, D7AZ-12A091-A

Vehicle Information

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

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

1969-1973 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)

1968-1971 FAIRLANE FAIRLANE, TORINO, 70 1/2 FALCON

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 8 CYL., ID# D7AE-B1A

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.
8 Reviews

88% of reviewers recommend this product.

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

Look exactly like original. Had a difficult time locating this part. Delivery was as promised

Submitted on April 24, 2019 by

YES I would recommend this product.

Quality

5 Stars

Value

4 Stars

Verified Buyer VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT

Submitted on April 25, 2019 by

YES I would recommend this product.

Quality

4 Stars

Value

4 Stars

Verified Buyer VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT

Easy to change and worked very well

Submitted on July 05, 2019 by

YES I would recommend this product.

Quality

5 Stars

Value

5 Stars

Verified Buyer VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT

Worked well for my non concourse car.

Submitted on December 26, 2019 by

YES I would recommend this product.

Quality

5 Stars

Value

5 Stars

Verified Buyer VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT

Submitted on July 31, 2020 by

Quality

5 Stars

Value

5 Stars

Verified Buyer VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT

Perfect fit.

Submitted on June 03, 2021 by

YES I would recommend this product.

Quality

5 Stars

Value

5 Stars

Verified Buyer VALVE ASSY, DISTRIBUTOR VACUUM CONTROL, 3 PORT

Fast to get me my parts and quality stuff

Submitted on March 29, 2022 by

YES I would recommend this product.

Quality

5 Stars

Value

5 Stars

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