Its all in the install.

How did you have a needle valve setup? How open was it? It only needs to be "just" cracked.

Who said to use braided SS line? I would srap some rubber tape around the braided line, especially where it goes through the firewall. The braided line rubs up against whatever else is going through your firewall and tends to abrade whatever its rubing against fairly quick.

I use Parker Paraflex nylon tubing. Its rated at 250 psi and is good to -40. Oh, and its very quiet as well. I using an Isspro guage - not sure if that would really make a difference though.

I run braided S.S. for my oil pressure guage though.

 

the noise went away when i pulled the line off so i know thats the culprit, it made the rattle noise when the valve was closed and opened, so would an isolator be a wast of money, or should i just wrap this steal line with electrical tape?

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i also drilled a special hole in the firewall for the fuel pressure line theres already to many damn lines running threw the stock gromit

 

Not electrical tape - rubber splice tape is what I used. Or you could use some type of foam or something else that will provide some cushion - but that is not going to keep it from making noise. Where/how do you have the guage mounted? That could be part of the problem as well. Maybe you could try isolating it with some rubber or something ?

I doubt the isolator will do much good - but I have not ran one myself. I have heard from a reliable source that the diesel tends to eat the diaphram in the isolator and after a short while you have diesel in the cab anyway.

 

the guage is mounted in my pillar pod an the bottom pyro top, boost middle feul pressure on the bottom, would it be better to just run some air brake line to it so its not vibrating so bad, it only did that when the line was conectong the guage to the pump

 

Try some air brake line - and maybe switch to 1/8"

 

ya running that braided line threw everything was a pian in the ***, will compression fittins be strong enough to hold the pressure of a 12v, i have all compression fittings that i run for my air bags wich are at at 100psi

 

Compression fittings are fine for that if you know how to install them (not too tight, not too loose) and you use good ones (two-piece ferrules). The ones from Home Depot or Lowes are hit and miss.

 

You wont be seeing any more than 40 psi.

I prefer to use Swagelok (Swagelok.com the source for tube fittings, valves, and other fluid system components) type fittings, but regular compression fittings should be ok, if you know how to install them properly.

 

i dont buy anything from homedepot or lows hate them i work part time at an asphalt company and part time at a hardware stor we have tons of compression fittings, i know how to install them but ive never seen any with two farrels just one

 

I would use 1/8" air brake line for the line to the guage, and I would run the 1/8" tubing through some 1/4" air brake line for abrasion resistance. It would be a pretty big mess if the line ever ruptured.