Engine 1998 3.8 no start, alarm wont stop

wmburns said:

Setting for 3 years. Don't rule out the possibility of rodent activity.

Also don't rule out the possibility of state gas.

If the theft light is flashing then the PCM is with holding fuel injector pulse.

Here's a crank with no start check list. Pay attention to how the PATS system "proves out". Also note the part about confirming that the fuel pump primes at every key on cycle.

Note, The fuel pump must prime even if PATS does not prove out. PATS does not work by turning off the fuel pump.

1996+ Crank with no start check list
http://www.allfordmustangs.com/forums/4-6l-tech/336452-1997-mustang-wont-ignite.html#2984838

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