porshapower
Active Member
- Joined
- September 30, 2005
- Messages
- 66
- Reaction score
- 0
- City, State
- jacksonville Florida
- Year, Model & Trim Level
- 1996 explorer
I did a fuel pressure test today. It was at 28 psi. When I disconnected the vacuum line from the regulator it stayed at 38 psi. I shut the engine off and it sat for 20 minutes with 38psi. Are these numbers low for a 1996 4.0 v6? I am chasing a slight rough idle(stumble) What can cause the low pressure? Pressure regulator? ThanksNelson