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Home >> Jeep >> 1990 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Testing >> Failure To Start Test >> 2.5L & 4.0L

2.5L & 4.0L

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Ensure battery has a minimum of 12.5 volts (9.5 cranking volts) available to operate cranking and ignition systems. If engine cranks, but does not start, see appropriate SELF-DIAGNOSTICS article and check ECU.