RAM 3500 Truck 2WD V10-8.0L VIN W MDC (1999)
4. Apply 15 - 20 inches vacuum at large end of check valve.
5. Vacuum should hold steady. If gauge on pump indicates vacuum loss, check valve is faulty and should be replaced.
4. Apply 15 - 20 inches vacuum at large end of check valve.
5. Vacuum should hold steady. If gauge on pump indicates vacuum loss, check valve is faulty and should be replaced.