when i turn key truck starts and runs as long asi hold key wheni let go it shuts off

Asked by Apr 22, 2017 at 05:39 PM about the 1990 Ford F-150 XLT Lariat 4WD Extended Cab LB

Question type: Maintenance & Repair

1 Answer


Most older automotive systems use a dual electronic circuit on the ignition system it has a start and run on the tumbler .. sounds like the ignition sw may have a bad contact in the run ( spray some wd 40 into the key slot and work it back and forth .... the trucks 27 years old so it may have built up debris inside)

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