I just bought a 1989 ford f150 with a fuel injected 302 for cheap because the truck doesnt start. I brought it home and checked the ovious, timing, spark, fuel pressure and everything looks good, but when i turn it over it back fires through the throttle body. any suggestions on what to do now is great.

 

Sounds like it may have jumped time, run a compression test and also check the firing order, post what you find out.