Fuel Pressure Spec for 99 XJ8?
#2
The following users liked this post:
Sinister 1 (03-20-2011)
#3
#4
![Default](/forum/images/icons/icon1.gif)
Well, a 7 psi drop would match 14" of mercury which seems like a reasonable vacuum reading at idle.
You did not ask, but the fuel pressure at WOT UNDER LOAD can drop off due to the pump's inability to supply volume. What you have proved so far is that your regulator is working fine, and the pump can supply pressure at low volume. To test under load, I use a long hose on my fuel pressure guage, with the guage taped to the OUTSIDE of the windshield, then go for a drive.
You did not ask, but the fuel pressure at WOT UNDER LOAD can drop off due to the pump's inability to supply volume. What you have proved so far is that your regulator is working fine, and the pump can supply pressure at low volume. To test under load, I use a long hose on my fuel pressure guage, with the guage taped to the OUTSIDE of the windshield, then go for a drive.
The following users liked this post:
Sonny Christopher (10-16-2018)
#5
Thread
Thread Starter
Forum
Replies
Last Post
aholbro1
XJ XJ6 / XJR6 ( X300 )
17
08-05-2021 05:02 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)