Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1986CAPRICE WAGON V8-307 5.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMDISTRIBUTORDISTRIBUTOR VACUUM CONTROLDESCRIPTION AND OPERATIONVACUUM MODULATOR CHECK VALVE (VM-CV)
1986 Chevrolet Caprice Wagon V8-307 5.0L
Vacuum Modulator Check Valve (VM-CV)
1986 Chevrolet Caprice Wagon V8-307 5.0LSECTION Vacuum Modulator Check Valve (VM-CV)
This valve is used on vehicles equipped with Electronic Fuel Control. The VM-CV is located in the line from the fresh air vent port of the vacuum modulator to the fresh air vent at the carburetor. It is used to make sure fresh air is drawn from the fresh air port at the carburetor and not from the fresh air vent of the vacuum modulator when the CEAB-TVS is open.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.