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.
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HOMESERVICE MANUALSFORD1980COURIER 2.3L ENG, STANDARD TRANS, TRANS MFR CD 5EREPAIR AND DIAGNOSISENGINE PERFORMANCEFUEL DELIVERYDECELERATION CONTROL SYSTEMTESTINGTHROTTLE POSITIONER SYSTEMSERVO DIAPHRAGM
1980 Ford Courier 2.3L Eng, Standard Trans, Trans Mfr CD 5E
Servo Diaphragm
1980 Ford Courier 2.3L Eng, Standard Trans, Trans Mfr CD 5ESECTION Servo Diaphragm
- Check hoses for proper routing and condition. Start engine and set idle speed. Turn engine off, detach vacuum hose from distributor and plug hose.
- Disconnect vacuum line at vacuum amplifier and vacuum hose at 3-way solenoid. Connect vacuum hose from servo diaphragm to vacuum amplifier so intake manifold vacuum is applied directly to servo diaphragm.
- Connect tachometer to engine. Start engine and idle. Note that engine speed should increase to 1000 RPM for Federal vehicles or to 1100 RPM for California vehicles. If not, adjust engine speed by turning adjusting screw on servo diaphragm throttle lever until proper speed is obtained. Reconnect all hoses to original position.
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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.