So I swapped in a new 4.6

I had a bullitt motor and it took a crap. So I bought a standard 4.6 Mustang motor and dropped it in...

I turn the key to accessory and it reads all dashes for the mileage. There is also a weird, loud, constant buzzing coming from the box located in the front passenger fender when the key is turned on, and the PATS / theft light flashes quickly.

It will bump, but it won't turn over.

Any ideas...

 

Did you swap out the PCM or instrument cluster?

You may also have already done so, however double and triple check the wiring and connectors, fuses, etc...

 

I didn't swap the cluster and pcm. Same motors were used... Well, mine is a 2001 and the motor is a 2000.