Cranks but wont start

Asked by GuruZ54WN Oct 13, 2017 at 02:02 PM about the 1997 Ford F-150 XLT 4WD LB

Question type: Maintenance & Repair

Have a 1997 Ford ranger , with manual
transmission,the the motor blew up in so
replaced it with a 2003 3.0L automatic
transmission, motor. It will crank but won't
start.

1 Answer
103,455

KenF answered 7 years ago

What engine computer is in it now? If you swapped out to the newer motor's computer, then you lost the programming for the PATs (anti-theft) system, which may now be armed with no way to disarm. Any time you swap an engine's computer it needs to be reprogrammed for the anti-theft.

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