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.

1987 Yugo GVFACTORY OEM SERVICE PROCEDURE

Warm Engine

With engine warm, the PVS is closed. This applies a vacuum signal to the EGR valve. This signal will cause the EGR valve to open, allowing recirculation of the exhaust gases into the incoming air/fuel mixture.

Fig 1: EGR System Components

Courtesy of YUGO AMERICA, INC.

Factory Service Tools

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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.