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Home >> Jeep >> 1989 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - 4.0L MPFI >> Testing & Trouble Shooting >> System Testing >> Notes

System Testing: Notes

WARNING: Always relieve residual fuel pressure in fuel delivery system before opening system. To prevent chance of personal injury, cover fittings with shop towel while connecting or disconnecting test equipment.