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Home >> Jeep >> 1990 >> Wrangler S >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - System/Component Tests - CARBURETED >> High Altitude Jumper
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High Altitude Jumper

At altitudes over 4000 feet, ensure the altitude jumper wire is connected (grounding terminal No. 11 at MCU and terminal No. 3 of diagnostic connector) and all other high altitude changes are performed. A high altitude kit is available from manufacturer and must be used in addition to connecting high altitude jumper.