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 MANUALSFORD1985ECONOLINE E350, VAN DISPLAY EXTENDED, 5.8 GREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSIS5.0L/5.8L FEEDBACK CARBURETOR TESTS W/CODESQUICK TESTSCONTINUOUS MONITOR (WIGGLE) TEST
1985 Ford Econoline E350, Van Display Extended, 5.8 G
Continuous Monitor (Wiggle) Test
1985 Ford Econoline E350, Van Display Extended, 5.8 GSECTION Continuous Monitor (Wiggle) Test
NOTE:
Make sure that Self-Test is deactivated. DO NOT
activate Self-Test unless specifically instructed to do so.
- This test monitors ECA inputs for shorts and opens. Self Test output will be activated when a fault is detected. A detected fault is indicated by a 10.5 volt or greater deflection on VOM. One or both of the following modes may be used to find intermittent fault:
- Key On/Engine Off (KOEO): Self-Test deactivated and ignition switch ON.
- Key On/Engine Running (KOER): Self-test activated. After service code output has finished, do not turn engine off or deactivate Self-Test. About 2 minutes after code 11 has been displayed, Continuous Monitor test mode will start. It will run until Self-Test is deactivated or engine is turned off.NOTE: An alternate method of entering this test with engine running is to enter Engine Running test, exit, and re-enter Engine Running test. DO NOT turn engine off.
- Observe VOM while moving, wiggling, and tapping the system harness, connectors, and sensors. If an intermittent condition is created, the monitor will indicate this by storing a service code.
- Perform KEY ON-ENGINE OFF (KOEO) SELF-TEST to retrieve codes. If any codes are indicated, go to proper test as shown in Continuous Test table. If no codes appear, the fault is not in a monitored EEC sensor circuit. EEC testing is complete. Refer to TEST X - DIAGNOSIS BY SYMPTOM for additional testing information.
NOTE:
Continuous test can only be run once without turning ignition off. DO NOT
miss any of the service codes.
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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.