Standard Ignition VC-233 Distributor Vacuum Advance

Distributor Vacuum Advance for GM Applications

Standard Ignition VC-233 is a distributor vacuum advance valve built for precise ignition timing control in a wide range of GM vehicles. It is calibrated for correct advance response and tested at up to 30 inHg of vacuum to help confirm leak-free operation.

• Precision-calibrated vacuum advance valve for distributor timing control
• Vacuum-tested to 30 inHg maximum to verify sealing performance
• Contents: valve
• 1 hose connector for vacuum line connection
• Standard Ignition VC-233 for select Buick, Chevrolet, GMC, Oldsmobile, and Pontiac applications

Fitment and Cross Reference

Compatible With 1986-1987 Buick LeSabre, N/A; 1982-1987 Buick Regal, N/A; 1987 Chevrolet Blazer, N/A; 1981-1987 Chevrolet Camaro, N/A; 1981-1987 Chevrolet Caprice, N/A; 1984-1987 Chevrolet El Camino, N/A; 1981-1987 Chevrolet Monte Carlo, N/A; 1985-1987 Oldsmobile Cutlass, N/A; 1985-1987 Oldsmobile Cutlass Supreme, N/A; 1985-1987 Pontiac Firebird, N/A; 1983-1987 Pontiac Grand Prix, N/A; and additional 1975-1980 GM applications listed in fitment. This part cross-references DENSO Auto Parts 5312 and Standard Ignition V415 for the same application.

What It Is Used For

• Restoring proper distributor vacuum advance response
• Addressing timing irregularities caused by a leaking vacuum advance valve
• Correcting hesitation or drivability issues tied to inaccurate ignition advance
• Replacing a worn vacuum advance unit on select GM distributor systems

Installation Notes and Tips

Verify distributor number, emissions calibration, and OE reference before installation. Match the vacuum advance to the vehicle’s emissions setup, since many listed applications vary by federal, California, Canada, export, or high-altitude calibration. Confirm the vacuum hose connection is secure and inspect the distributor for wear before replacing the advance unit.

Quality Assurance

Standard Ignition has served the automotive aftermarket since 1919 and manufactures ignition products with quality control maintained from component selection through finished product testing. VC-233 is vacuum-tested during production to help ensure consistent sealing and calibration.