consiglio46

Hey everyone I'm working on a 99 towncar modular 4.6 first let me tell you what has been done / replaced

rebuilt 4.6 engine / and transmission done by someone else / reman

Things Ive done

Time'd it
coils
plugs /"Motocraft"
Intake manifold
cat's / dual exhaust all new
new o2's
valve cover gaskets
alternator
fuel pump

I had it running perfect about 2 days ago and took it to the dealer hooked it upto the ford pcm tool and all cylinders were running perfectly and the car was driving fine, no codes on several coast downs from 60-40 drove fine all day, then randomly yesterday I started it and it has no low range / mid power but open throttle it runs like hell... and it idles perfect even in gear until you give it gas to nudge it compression test reads perfect on all cylinders on the ford computer system

what am I missing

consiglio46

well... my vaccume gauge reads low vaccume when moving at low speeds so im thinking I have a melted cat... Im going to pull it off tonight and see what happens