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 MANUALSCHEVROLET1986CAVALIER RS, 2D HATCHBACK, 2.8 W, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMV6/V8 PFI COMPONENT TESTCHART A1 - NO "SERVICE ENGINE SOON" LIGHT (2.8L)DIAGNOSTIC AIDS
1986 Chevrolet Cavalier RS, 2D Hatchback, 2.8 W, Automatic
Diagnostic Aids
1986 Chevrolet Cavalier RS, 2D Hatchback, 2.8 W, AutomaticSECTION Diagnostic Aids
Engine Runs Okay, Check The Following:
- Faulty light bulb.
- Circuit No. 419 has an open.
- Fuel gauge fuse is blown. This will result in no stop, oil or alternator warning lights.
Engine Cranks But Will Not Run, Check The Following:
- Continuous battery power, fuse or fusible link is open.
- ECM fuse has a open.
- Battery circuit No. 340 to ECM is open.
- Ignition circuit No. 439 to ECM is open.
- Poor plug connection at ECM.
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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.