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 MANUALSMERCURY1982COUGAR/XR7 V8-255 4.2LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTFUEL DELIVERY AND AIR INDUCTIONCARBURETORSERVICE AND REPAIRTAMPER RESISTANT CAP REMOVAL
1982 Mercury Cougar/XR7 V8-255 4.2L
Tamper Resistant Cap Removal
1982 Mercury Cougar/XR7 V8-255 4.2LSECTION Tamper Resistant Cap Removal
Fig. 12 Tamper resistant idle mixture adjusting screws:
1. Remove, then drain fuel carburetor.
2. Invert carburetor and locate locking tab on locking cap, Fig. 12. Support area under locking cap when removing to prevent bending of adjustment needle.
3. Tap locking cap, using light hammer and blunt punch until locking tab clears detent in locking plug.
4. Remove locking cap from locking plug.
5. Repeat steps 3 and 4 for another cap.
6. Install caps after performing propane enrichment test as follows: Position locking tabs on cap to align with detent in plug and press cap into plug.
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.