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 MANUALSDODGE AND RAM1990SHADOW BASE, 4D HATCHBACK, 2.5 J, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMEGR FUNCTION TESTINGEGR FUNCTION TESTINGNON-TURBO
1990 Dodge and Ram Shadow Base, 4D Hatchback, 2.5 J, Automatic
EGR Function Testing: Non-Turbo
1990 Dodge and Ram Shadow Base, 4D Hatchback, 2.5 J, AutomaticSECTION Non-Turbo
- Check vacuum hoses for correct routing. Warm engine to operating temperature. Some models with EGR delay timers must run for at least 1-2 minutes before EGR works.
- While observing EGR valve stem, abruptly accelerate engine to 2000-3000 RPM. EGR valve stem should move at least 1/8". Repeat test to confirm operation.
- Connect a hand-held vacuum pump to EGR valve. Idle engine and gradually apply at least 10 in. Hg. EGR valve stem and diaphragm should move smoothly and engine speed should drop at least 150 RPM. If engine speed does not drop, check for plugged EGR passage.
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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.