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 MANUALSFORD1987CUTAWAY 7.5 LREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMEGR FUNCTION TESTINGVACUUM AMPLIFIER
1987 Ford Cutaway 7.5 L
Vacuum Amplifier
1987 Ford Cutaway 7.5 LSECTION Vacuum Amplifier
- Check for adequate manifold vacuum. With engine warm and idling, connect vacuum gauge to port "O" on vacuum amplifier, leading to EGR Ported Vacuum Switch (PVS). Vacuum should not read more than 2 in. Hg at idle.
- Disconnect venturi hose at carburetor. Increase engine speed to 3000 RPM on 2.3L engines, or 2000 RPM on all other engines. Vacuum should not change. Maintain high engine speed and reconnect carburetor venturi hose.
- Vacuum gauge should register at least 4 in. Hg. Return engine to idle. Vacuum gauge should return to initial reading. If vacuum gauge does not return to initial reading, replace vacuum amplifier.
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.