1999 F150 4.6 Won't Start. Anti-theft light flashing
I have a 1999 F150 with the 4.6. My dad and I replaced the radiator support and now it won't start. It ran fine before but now it won't start. I've tried a lot of things to get it to start and none of them worked. I tried leaving the key on for 15 minutes and then starting and that didn't work. I also tried using two different keys. I'm stumped with what it could be. I'm thinking that it has to go to the dealer now. If anyone has any ideas that would be great!