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 MANUALSEAGLE1990PREMIER ESREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSEGR VALVE TEST
1990 Eagle Premier ES
EGR Valve Test
1990 Eagle Premier ESSECTION EGR Valve Test
- Disconnect EGR valve solenoid electrical connector. EGR valve is located on side of intake manifold. See Figure . By-pass EGR vacuum transducer by connecting EGR valve solenoid output directly to EGR valve. If EGR valve is good, engine should idle roughly or stall. Proceed to EGR VACUUM TRANSDUCER testing. If idle does not change, go to next step.
- Disconnect vacuum hose from EGR valve and connect hand operated vacuum pump to EGR valve. Apply at least 12 in. Hg of vacuum to valve. If engine now idles roughly or dies, check vacuum lines between EGR valve and intake manifold. Also, check vacuum line between transducer and EGR base. If no leaks are found, proceed to EGR VACUUM TRANSDUCER test.
- If engine RPM did not change in step 2), remove EGR valve. Inspect EGR valve and exhaust passage in manifold for blockage, repair as necessary. If no blockage is found, replace EGR valve.
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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.