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 RAM1983CHALLENGER STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEEMISSIONSEGR FUNCTION TESTING - CHRYSLER/MITSUBISHIEGR FUNCTION TESTING - CHRYSLER/MITSUBISHITEST 41986 COLT & COLT VISTA (PORTED EGR VALVE)
1983 Dodge and Ram Challenger Standard
1986 Colt & Colt Vista (Ported EGR Valve)
1983 Dodge and Ram Challenger StandardSECTION 1986 Colt & Colt Vista (Ported EGR Valve)
- Ensure engine is at normal operating temperature. Disconnect Green-striped vacuum hose from carburetor and connect a vacuum gauge to hose end. Apply 20 in. Hg. If engine runs rough or stalls, EGR valve and thermovalve are functioning properly.
- With engine idling, remove White vacuum hose from Vacuum Regulator Valve (VRV). Connect a hand-held vacuum pump to VRV nipple. Apply 20 in. Hg. If no vacuum can be created, VRV is defective. If a slow vacuum leak is indicated, the VRV is functioning properly.
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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.