jpmustanggt

http://s63.photobucket.com/albums/h1...=blower002.flv
What could cause my fuel pressure to drop like this? It will go down to 20 sometimes after I get on it.

02WhiteGTVert

Do you have MILs? my buddy's car does the same thing..and he doesn't have MILs...

jpmustanggt

No, but my car is tuned.

2000GT4.6

MILs or lack therof should not effect fuel pressure.

I can't watch the vid at work, but if your fuel pressure is falling down to 20 PSI while you have it WOT your in trouble. mine stays around 40 crusing and 55-60 at WOT. If it falls to 20 while going WOT I would definatly not be getting on it, chances are you have a lean condition.

If it falls down to 20 PSI while idling/cruising, the car does not run hot, and it goes to 45+ PSI when going WOT, your probably fine. They can use the fuel pressure setpoint to setup your a/f ratio when idling/crusing/going WOT>

jpmustanggt

The car idles at about 36-40, at WOT it'll go up to 60-70 and when I throw it into neutral after WOT it'll go down to 20-30. So you think thats ok?