DARREN: Thanks for the help. There is pressure at the schrader valve on the fuel rail - it shoots up about 2-3 inches so it seems adequate. Strangely enough i went to buy a fuel pressure tester and the only one that came with a schrader valve adapter listed all the makes and models of vehicles the tester supported and no F150s were listed??? The parts guy didn't have a clue as to why so I didn't buy it. Any ideas on this? Yes the pumps prime - I can hear them and I replaced them just last fall. Both in tank pumps (I have dual tanks as well as the in-line hi-pressure pump.) As far as the fuel pressure regulator and TPS - my manuals say they can be cleaned up a bit and reinstalled. I have tried this - but no change. When you say emmisions - what specifically are your thinking of?
TEXASGUY: Thanks for the IAC thought. My manual says to run on idle without any assisted gas and unplug the IAC (IAB) and unpluging it at idle. If the engine begins to run rough or stalls then the IAC/IAB is possibly bad. However my problem is that I cannot idle the engine. The moment I let of on th gas peddle the engine dies immediately. So I have a bit of a problem trying this test. Any ideas on this. I hate to just go out an buy new parts and hope they fix the problem. I prefer to test them if possible, but in this case I may have to just buy a new IAC?