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 MANUALSDODGE AND RAM1983MIRADA 3.7 HREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMELECTRONIC FUEL CONTROL SYSTEMPOOR PERFORMANCE TESTINGELECTRONIC THROTTLE CONTROL SYSTEM TEST
1983 Dodge and Ram Mirada 3.7 H
Electronic Throttle Control System Test
1983 Dodge and Ram Mirada 3.7 HSECTION Electronic Throttle Control System Test
- Connect a tachometer to engine. Start and run engine until normal operating temperature is obtained. On vehicle without air conditioning, depress and release accelerator. An RPM higher than curb idle speed should be seen for specified time shown in EGR and Throttle Control Specifications table.
- On vehicles equipped with air conditioning or rear window defogger, turning on the air conditioner or defogger and depressing accelerator for a moment should give an RPM higher than curb idle speed. Turning off the air conditioner or rear window defogger will result in normal idle speed.NOTE: The air conditioning clutch will cycle on and off as it is running. DO NOT mistake this for electronic throttle control operation.
- On all vehicles, if speed increases do not occur as outlined above, turn engine off and disconnect 3-wire connector at carburetor (idle stop solenoid and duty cycle solenoid). Using an ohmmeter, check the resistance of the solenoid by measuring from the 3-wire connector containing the Black wire to ground. Resistance should be 15-35 ohms. If not, replace idle stop solenoid.
- On vehicles without air conditioning or rear window defogger, start vehicle and before specified time has elapsed, measure voltage at Black wire of 3-wire connector. Voltmeter reading should equal charging system voltage. If voltmeter reading does not equal charging system voltage, replace the Gray starter timer on 3.7L Federal models. On all other models, replace the computer.
- On air conditioned vehicles, start engine and turn on air conditioner. Measure voltage at Black wire of 3-wire connector. Voltmeter reading should equal charging system voltage AFTER specified time has elapsed. If not, check wiring back to instrument panel for an open circuit.
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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.