Keep your distributor's timing advance responding to engine vacuum with the Standard Ignition distributor vacuum advance VC-302. This vacuum advance control is a direct-fit replacement for many vehicles, including the 1980-1982 Chevrolet Impala, 1978-1986 Chevrolet C10 and 1978-1986 Chevrolet K10. It covers a wide range of Buick, Chevrolet, GMC, Oldsmobile and Pontiac models. See the "Vehicles it fits" section for the full list and engine details.
A vacuum advance mounts on the distributor and uses engine vacuum to advance ignition timing. Timing advances when vacuum is high, such as during light-load cruising. As vacuum drops, timing is allowed to return toward base.
- Precision calibrated: Calibrated for correct ignition advance.
- Leak tested: Units are tested at 30HG maximum vacuum to check that they do not leak.
- Quality control: Standard Ignition is a global manufacturer of original equipment ignition products. It maintains quality control through the whole manufacturing process, from componentry to finished product.
- Heritage: Standard Ignition has served the automotive aftermarket since 1919, with broad ignition coverage.
Signs this part may need replacing: Look for hesitation or sluggish response at part throttle, reduced fuel economy, a vacuum leak at the advance unit, or timing that no longer advances when vacuum is applied. These symptoms can have other causes, so diagnose the ignition and vacuum systems before replacing parts.
Interchange: V482 · DV1874 · VC1703 · 19138061 · 1973626
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
V482, DV1874, VC1703, 19138061, 1973626
Frequently Asked Questions
What does a distributor vacuum advance do?
It uses engine vacuum to advance ignition timing at the distributor, typically during light-load cruising. As vacuum drops, timing is allowed to return toward base.
Which vehicles does the Standard Ignition VC-302 fit?
It fits many GM vehicles, including the 1980-1982 Chevrolet Impala, 1978-1986 Chevrolet C10 and 1978-1986 Chevrolet K10. See the "Vehicles it fits" section for the full list and engine details.
How is the VC-302 checked for leaks?
Standard Ignition tests these units at 30HG maximum vacuum to check that they do not leak.
What part numbers does the VC-302 interchange with?
It replaces V482, DV1874, VC1703, 19138061 and 1973626.
What are signs a vacuum advance may be failing?
Possible signs include hesitation at part throttle, reduced fuel economy, a vacuum leak at the unit, or timing that won't advance with vacuum applied. Diagnose the cause before replacing.
