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 MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEM1.6L & 2.2L EFC SYSTEMTESTINGELECTRONIC FUEL CONTROL SYSTEM TESTSCARBURETOR SWITCH TEST
1984 Plymouth Horizon Base, 1.6 A
Carburetor Switch Test
1984 Plymouth Horizon Base, 1.6 ASECTION Carburetor Switch Test
- Turn ignition off and disconnect 10-wire connector from computer. With throttle completely closed, check continuity with ohmmeter leads connected to cavity 7 and ground.NOTE: Grounding carburetor switch eliminates spark advance on most systems.
- If no continuity is read, check wire from cavity 7 to carburetor switch terminal. Also check carburetor switch for proper operation.
- Open throttle and check for continuity from cavity 7 to ground. There should be no continuity. If readings are not as described, replace carburetor switch.
NOTE:
After performing carburetor switch test, perform tests on the spark control system and fuel control system.
RENDER: 1.0x
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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.