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 MANUALSFORD1987BRONCO 4.9 Y, STANDARD, T18REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISCEC DIAGNOSING & TESTINGQUICK TESTCONTINUOUS SELF-TESTTEST RESULTS & ACTION TO TAKE
1987 Ford Bronco 4.9 Y, Standard, T18
Test Results & Action To Take
1987 Ford Bronco 4.9 Y, Standard, T18SECTION Test Results & Action To Take
- Ensure that all previous QUICK TEST steps have been successfully completed. Verify proper test equipment hook-up. See EQUIPMENT HOOK-UP in this article. Make sure that SELF-TEST is deactivated. DO NOT activate SELF-TEST unless specifically instructed to do so.
- Using service codes obtained in CONTINUOUS MEMORY CODES TO BE TESTED, perform the test(s) indicated in the CONTINUOUS SELF-TEST CIRCUIT TEST MENU table for that specific engine. While performing CIRCUIT TESTS , one or both of the CONTINUOUS MONITOR (WIGGLE) TEST may have to be used to find intermittent fault.
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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.