I just installed a fuel pressure gauge that has a transducer, remote signal box and guage (This is all electrical except for the transducer). What pressure should I expect to read? I think the system has some problems as I am reading 85-90 psi. This has to be wrong. I have checked the wiring several times and everything is wire per the instructions. I plan to call the company Tuesday to ask for some help.

 

Was that at WOT ?
At what rpm ?
What did you expect to read ?

400 hp/ 8 cylinders = 50 hp of fuel per cylinder, you are going to need some pressure on the injectors.

 

ttt

 

These specs are from 2000 repair manual:

Engine running: 28-45 PSI
Key on-engine off: 35-45 PSI
I highly doubt that this spec is differet for '99 or '01. Is there a trim pot of some kind to adjust?

 

Here ya go from my Mechanical guage, and what I have posted about before in the past.

At idle your looking for 26-28 psi.
At full boost (for me) I am seeing 48 psi.
Hope this helps

------------------
Spiro-
12.373 @ 110.15
Best 60' 1.72
@ 4700 w/out the Go-Go juice

11.94 @ 115.31 with 100 shot Go-Go juice @ 4700 lbs.

11.40 @ 113 with 150 shot(on the brakes)NOT BACKED UP!
4700 lbs.

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