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 MANUALSCHRYSLER1987FIFTH AVENUE 5.2 4REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMEFC SYSTEMTESTINGCOLD DRIVEABILITY TEST 6 - EGR SYSTEM CHECK
1987 Chrysler Fifth Avenue 5.2 4
Cold DRIVEABILITY Test 6 - EGR System Check
1987 Chrysler Fifth Avenue 5.2 4SECTION Cold DRIVEABILITY Test 6 - EGR System Check
- Disconnect vacuum hose from EGR valve. Connect vacuum gauge to the vacuum hose. Start engine. Slowly increase engine speed. Vacuum reading should be zero with the engine temperature below 70°F (21°C) on 2-Bbl. models and below 50°F (10°C) on 4-Bbl. models. If there is NO vacuum, proceed to COLD DRIVEABILITY TEST 7 .
- If there is vacuum, connect voltmeter to the EGR vacuum solenoid (Gray wire) and ground. Observe voltmeter reading. Voltage should be 0-1 volts with the engine temperature below 70°F (21°C) on 2-Bbl. models and below 50°F (10°C) on 4-Bbl. models.
- If voltage is okay, connect voltmeter to EGR vacuum solenoid (Blue wire) and ground. Voltage reading should be within one volt of battery voltage. If voltage reading is okay, replace EGR solenoid. If zero volts, repair wiring to the ignition switch for an open circuit.
- If voltage reading is step 2) is above one volt, turn ignition off. Disconnect computer 12-way connector. Connect a voltmeter to 12-way connector cavity "7" and ground. Turn the ignition switch to the "RUN" position. Voltmeter reading should be within one volt of battery voltage.
- If voltage is within specifications, check terminal in 12-way connector cavity "7" to ensure it is not spread apart causing a poor connection. If connections are okay, replace computer. If there is zero volts, repair wiring to cavity "7" for an open circuit to the EGR vacuum solenoid.
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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.