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 PERFORMANCESYSTEMEGR SYSTEMSERVICINGEGR VALVE
1984 Plymouth Horizon Base, 1.6 A
EGR Valve
1984 Plymouth Horizon Base, 1.6 ASECTION EGR Valve
- Inspect valve for deposits with particular attention to the poppet and seat area. If deposits exceed a thin film, valve should be cleaned.
- Cleaning is aided by applying a liberal amount of manifold heat control solvent, or equivalent, to the poppet and seat area, allowing deposits to softenCAUTION: Extreme care should be taken when using solvent cleaners to prevent spilling of solvent on valve diaphragm.
- Use an external vacuum source to open poppet and then scrape deposit from this area. If wear of stem or other moving components is noted, valve should be replaced.
NOTE:
Do not push valve stem manually, use an external vacuum source only.
RENDER: 1.0x
NO RELATED
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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.