Standard Ignition Distributor Vacuum Advance P/N:VC-257
Keep your classic Dodge or Plymouth's spark timing responding to engine load with the Standard Ignition Distributor Vacuum Advance VC-173. It is a direct-fit replacement for the listed applications, including the 1969-1972 Dodge Charger, 1969-1972 Plymouth Barracuda, 1969-1974 Dodge D100 Pickup, 1970-1972 Dodge Challenger and 1970-1972 Plymouth Duster. It covers 35 Dodge and Plymouth car, truck and van applications in all. See the Buyer's Guide tab for the full list and engine details.
A distributor vacuum advance control uses engine vacuum to advance ignition timing when the engine is under light load. It lets the timing return as vacuum drops. If the original unit leaks or sticks, timing advance may not respond as intended.
Signs this part may need replacing: Hesitation or stumbling on light acceleration, reduced fuel economy, a vacuum leak at the distributor, or timing advance that does not move when vacuum is applied. These symptoms can have other causes, so diagnose the cause before replacing.
Interchange: V192 · 2875809 · 2875825 · 3438514 · CV3011 · VC3011
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 and lets timing return as vacuum drops. The Standard VC-173 is calibrated for correct ignition advance on its listed applications.
Is the VC-173 leak-tested?
Yes. Standard tests these units at 30HG maximum vacuum to confirm they do not leak.
Which vehicles does the VC-173 fit?
It is listed for 35 Dodge and Plymouth applications, including the 1969-1972 Dodge Charger and 1970-1972 Plymouth Duster. See the Buyer's Guide tab for the full list.
What part numbers does the VC-173 interchange with?
It interchanges with V192, 2875809, 2875825, 3438514, CV3011 and VC3011.
How can I tell if my vacuum advance has failed?
Signs include hesitation on light acceleration, reduced fuel economy, or advance that does not move when vacuum is applied. If a leaking or stuck vacuum advance is the cause, this unit replaces it.
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.