Having problems with my Kenne Bell fuel pressure gauge...with vid.

[THE BLACK MAMBA]

I`m having problems with my fuel pressure gauge bouncing...what can cause this

 

[THE BLACK MAMBA]

anybody....

 

[696]

My guess is it's starved for fuel. I was using the same KB gauge when I was running the fuel out of my tank. Before it ran dry my gauge did the same thing. It bounced more the lower the fuel got. My $.02

 

[BOP4ever]

What does it do when you turn the car off ?
Should slowly bleed off. If it drops fast it maybe a check valve in the pump if so equipped or a regulator or injectors bleeding down.
Is the gauge filled or does it have a damper that might have broke?
How about running the pump with the engine off through the test plug?

 

[GNICETRY]

My KB gauge shows lower pressure when I have about 1/8 tank of gas. Maybe your fuel filter is clogged? Can't replace those too much.

 

[xrunner123]

Vibration?
If you remove it from the mount and hold it in your hand does it still do it?

 

[THE BLACK MAMBA]

My guess is it's starved for fuel. I was using the same KB gauge when I was running the fuel out of my tank. Before it ran dry my gauge did the same thing. It bounced more the lower the fuel got. My $.02

Well i thought that too...so i put some more fuel in it...and still the same

 

[THE BLACK MAMBA]

What does it do when you turn the car off ?
Should slowly bleed off. If it drops fast it maybe a check valve in the pump if so equipped or a regulator or injectors bleeding down.
Is the gauge filled or does it have a damper that might have broke?
How about running the pump with the engine off through the test plug?

I have not monitor the drop yet...i will check

 

[THE BLACK MAMBA]

My KB gauge shows lower pressure when I have about 1/8 tank of gas. Maybe your fuel filter is clogged? Can't replace those too much.

Its a new one, but i will change it this weekend....I can hear the fuel pulsating in the gauge

 

[THE BLACK MAMBA]

Vibration?
If you remove it from the mount and hold it in your hand does it still do it?

That was the first thing i did, was removed it from the mount and still did the same thing

 

["Reaper"]

My KB FPG did the same thing put a new autometer FPG on and problem went away.

 

[Ttype6]

I`m having problems with my fuel pressure gauge bouncing...what can cause this

How does it act under full boost?

 

[THE BLACK MAMBA]

How does it act under full boost?

Due to overboost problems i usually get out of it at #15psi, and its hard getting a accurate reading on the fuel pressure gauge due to the needle moving alot....if you listen close you can hear the fuel gauge pulsating...

 

[Ttype6]

Due to overboost problems i usually get out of it at #15psi, and its hard getting a accurate reading on the fuel pressure gauge due to the needle moving alot....if you listen close you can hear the fuel gauge pulsating...

So it always bounces?

 

[jhanson1750]

Is everything else on the car running good? I have seen this exact thing on my sons 91 Syclone. It is a batch fired setup and when it fires all 6 sixty pounders the gauge jumps around quite a bit. As the revs come up it smooths out. I would take a look at http://turbobuick.com/forums/threads/desparate-not-sure-what-to-try-next.380770/#post-3058100 and see if it looks like anything that is going on with your set up. Good luck, Jon Hanson