Standard Ignition Distributor Vacuum Advance P/N:VC-257
Standard Motor Products
Keep ignition timing responding to engine load with the Standard Ignition distributor vacuum advance VC-169. It is a direct-fit replacement for many vehicles, among them the 1965-1972 Chevrolet Impala and 1967-1972 Chevrolet Camaro. See the "Vehicles it fits" section for engine details and the full list.
A distributor vacuum advance control uses engine vacuum to move ignition timing ahead under light-load conditions, then lets timing return as vacuum drops. If a leaking or sticking original unit is the cause of sluggish part-throttle response or poor fuel economy, this unit replaces it.
Signs this part may need replacing include a diaphragm that will not hold vacuum, a hiss at the unit, hesitation or flat response at part throttle, or reduced fuel economy. Diagnose the cause before replacing, since timing and vacuum problems can have other sources.
Interchange: V353 · VC1605 · 1115357 · 19110625 · 19138051 · 1973436
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
What does a distributor vacuum advance do?
It uses engine vacuum to advance ignition timing under light-load conditions and lets timing return as vacuum drops.
Is the Standard Ignition VC-169 leak tested?
Yes. Standard Ignition tests these units at 30HG maximum vacuum to confirm they do not leak.
Which vehicles does the VC-169 fit?
It fits many vehicles, including the 1965-1972 Chevrolet Impala and 1967-1972 Chevrolet Camaro. See the "Vehicles it fits" section for the full list.
What are signs a vacuum advance may be failing?
Possible signs include a diaphragm that won't hold vacuum, a hiss at the unit, flat part-throttle response or lower fuel economy. Confirm the cause before replacing, as other faults can produce these symptoms.
What part numbers does the VC-169 interchange with?
It cross-references V353, VC1605, 1115357, 19110625, 19138051 and 1973436.
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WARNING: These products can expose you to chemicals including lead and phthalates, 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.