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.
Exhaust Gas RECIRCULATION: Description
Exhaust gas recirculation (EGR) system is used to help control formation of NOx emissions. By recycling some exhaust gas from exhaust ports back to intake system, combustion temperatures are lowered, which helps keep NOx emissions down.
System consists of EGR valve, EGR pipe, thermal vacuum valve and control valve orifice (except Auto. Trans. and 4-WD models with Hitachi carburetors).
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.