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 TESTINGDETONATION SENSOR TEST
1983 Dodge and Ram Mirada 3.7 H
Detonation Sensor Test
1983 Dodge and Ram Mirada 3.7 HSECTION Detonation Sensor Test
NOTE:
This test applies to 5.2L engines only.
- Connect a variable timing light to engine. Start engine and run it on second highest step of fast idle cam (about 1200 RPM). Connect an auxiliary vacuum supply of 16 in. Hg vacuum.
- Using a small wrench, tap lightly on manifold, near the sensor. With timing light, look for a decrease in spark advance. The amount of timing decrease should be in proportion to the strength and frequency of the tapping. Maximum decrease in timing should be 11°. Turn engine off and remove timing light.
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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.