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 Suzuki Samurai BaseFACTORY OEM SERVICE PROCEDURE
3-Way Solenoid Valve (TWSV)
- Disconnect hoses connecting TWSV to EGR valve and EGR modulator. Connect test hoses to TWSV. See Fig 1 . Blow into test hose No. 1, checking that air escapes from test hose No. 2.
- Disconnect TWSV electrical connector and connect 12-volt battery to connector terminals. With battery connected, blow into test hose No. 1, checking that air escapes from TWSV filter and not test hose No. 2. If TWSV does not operate properly, replace with a new unit. Reconnect hoses and electrical connector.
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.