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 MANUALSCHEVROLET1998TRACKER 2D UTILITY, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC ENGINE TESTINGPRELIMINARY INSPECTION & ADJUSTMENTSMECHANICAL INSPECTIONEXHAUST SYSTEM BACKPRESSURE
1998 Chevrolet Tracker 2D Utility, RWD, Automatic
Exhaust System Backpressure
1998 Chevrolet Tracker 2D Utility, RWD, AutomaticSECTION Exhaust System Backpressure
- Perform On-Board Diagnostic (OBD) System Check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK in TESTS W/CODES article. After performing OBD system check, go to next step.
- Remove HO2S (sensor 1). Install Exhaust Backpressure Tester (J-35314-A) in place of HO2S (sensor 1). After tester is installed, go to next step.
- Start engine. Observe pressure reading on tester with engine at idle. If 1.25 psi or less exists, go to next step. If greater than 1.25 psi exists, go to step 5).
- Increase engine speed to 2000 RPM and observe pressure reading on tester. If greater than 1.25 psi exists, go to next step. If 1.25 psi or less exists, go to step 7).
- Check entire exhaust system for collapsed pipe, heat distress or possible internal muffler failure. If problem does not exist, go to next step. If problem exists, repair as necessary and go to step 7).
- Replace catalytic converter and go to next step.
- Allow engine to idle until normal operating temperature is obtained. Check for DTCs. If DTCs do not exist, system is okay at this time. If DTCs exists, perform appropriate DTC test. See TESTS W/CODES article.
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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.