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New Member
- Joined
- Aug 2, 2009
- Messages
- 35
- Reaction score
- 4
- Points
- 0
- Location
- Muse, Pa.
- Vehicle Year
-
1996
1995
- Make / Model
-
Mazda
Ford
- Engine Size
- 4.0L
- Transmission
- Automatic
Ok, I have a 95 Ranger 4.0L 4x4. It is running rough at idle in traffic or at a traffic light stop. Checked the fuel rail pressure today and it shows about 36#. The problem appears to be that the gauge drops to 0 # when the key is turned off. We also checked another trucks fuel rail and the pressure stays at 40#. There is no CEL, the emissions station advised the truck isn't holding a steady enough idle to pass. Is there a check valve somewhere in the fuel rail or regulator or fuel pump that ie causing this bleed off? We also changed out the fuel filter, but when putting it back together it felt like the downstream side of the filter connector appeared to be loose however it is not leaking. Any HELP is Appreciated. Thanks.