Since I'm always on here figure I might run this by yall and see what you say...
I just recently aquried an 86' fullsize bronco with a 351w fuel injected.... that is my mud toy...anyhow...it misses really bad around 4000...but then clears up around 4600. Has a very slight miss at idle but other then that runs good until it hits about 4 grand then breaks up but comes back after you get past that rough spot...
(oops ment to put this in off topic...)