i just had a new 4.2L replaced in my 1997 f-150and now need the computor reset to check OBD

 

That should have happened when the battery was disconnected..

What are you actually trying to accomplish?

 

when i took the truck in for imisions test the OBD would not connect. they said computor needs to reset itself before OBD woarks. I have 130 miles on truck sinse i picked it up. my goal is to get it to pass test so i can get it lisenced.

 

If they were unable to connect, that's a hardware problem unrelated to "resetting" the computer.

Most commonly, it's a blown fuse that powers both the cigar lighter and the OBDII port. See owner's manual.