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Home >> Jeep >> 1987 >> Wrangler Base, 4.2 C, Automatic >> Repair and Diagnosis >> Engine Performance >> Adjustment >> Tune-Up - 6-CYL >> Adjustments >> Idle Mixture >> Notes

Idle Mixture: Notes

NOTE: Ensure idle speed and timing are set before performing idle mixture adjustment. If mixture adjustment takes more than 3 minutes, run engine at 2000 RPM in Neutral for one minute, and resume adjustment.
NOTE: Idle mixture adjustment is not part of a normal tune-up. DO NOT adjust mixture unless carburetor has been disassembled or vehicle fails emissions testing.