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
EGR Modulator
- Disconnect modulator hoses and remove modulator. Check modulator filter for contamination or damage. Using compressed air, clean filter. Reinstall filter. Plug one of the side nozzles with a finger while blowing air into the nozzle on the other side. Check that air escapes from the air filter side of the modulator. See Fig 1 .
- Connect a vacuum gauge to nozzle No. 1 and plug nozzle No. 2 with a finger. While blowing air into nozzle No. 3, operate vacuum pump gauge and check that vacuum is applied to modulator.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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