Electric fuel pressure guage ????

[jlfq2]

Is it normal to see a difference in readings between a mechanical and electric fuel pressure guage?I just installed a Glowshift fuel pressure guage and it is reading about 8 psi higher than a mechanical guage that i had on there.I had the mechanical guage on there for a week and never saw over 70 psi and that was only the first day it was on there.Then it went to 68psi and stayed there.The electric guage is showing 76 psi at idle and 70 WOT.I just installed a fuel pump and fuel pressure regulator kit a week ago.I don't mind it being different just wondering if anyone else has had this prob.I would think the mechanical gauge shoul be more accurate
Thanks,Jeff

[Beef52751]

are the gauges hooked up the same???

[dhanna6powerstroke]

If you put the updated blue fuel pressure spring in, it will read higher.

[jlfq2]

I put the spring kit in at the same time I put the mechanical gauge on.Today I took the mechanical guage off and hooked up the glowshift electric gauge.I am just hoping the glow shift guage is wrong because I do not want to mess up my injector O rings.They were both hooked to the test port.
Jeff

[dhanna6powerstroke]

Originally Posted by jlfq2

I put the spring kit in at the same time I put the mechanical gauge on.Today I took the mechanical guage off and hooked up the glowshift electric gauge.I am just hoping the glow shift guage is wrong because I do not want to mess up my injector O rings.They were both hooked to the test port.
Jeff

Is it the blue spring? Most guys have said they see around 70 PSI tops.

[jlfq2]

Yes blue spring

[dhanna6powerstroke]

Originally Posted by jlfq2

Yes blue spring

I say the Glow Shift gauge is inaccurate