i have a mecanical gauge w/isolater i have replaced once and am still not " at ease" with the dependability/accuracy of this one. are you guys using the mecanicals w/ isolaters or without isolaters or electrical ?

 

Isspro Mechanical - No Isolator - 3 years - no drips.
If it says I gots no pressure, I gots no pressure.

 

Could be you have a bad LP, mechanical gauges don't lie.

 

just replaced lift pump couple days ago . shows 10 lbs now. but gauge does not drop when i shut truck down and is eratic. sometimes 10 lbs then 4 lbs then 7 lbs ect.
gauge at pump reads 18 lbs

 

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I agree 100%
I would suggest plumbing it without the isolator

 

when you guys have no isolator when you put it in did you beed all the air out? or if not how did you do it?

 

No need to bleed
Pressure is pressure

 

sweet, i think i'm going to do that with mine. thanks

 

how do you all contect to the guage?what size line and kind of fitting?
Rob

 

the lines and fittings came with my gauge

 

I do all of mine with the same type of tubing used for mechanical oil pressure and boost gauges, 1/8" plastic with compression fittings. Push the 1/8" line though a 1/4" line to prevent kinks and cuts. Makes it a lot easier to deal with.

 

Wouldn't you rather use copper than that vinyl/plastic line? Personally I would anti up to the braided steel line. I had some of the plastic line leak on the race car on the oil psi gauge and that made a huge mess.

 

I dont like the plastic(teflon) either, however I know of many people who have had no problems with it. Personally I feel safer with the SS braided teflon.

 

Too much engine movement, copper would eventually break. I've had the same plastic boost type lines on both my rigs for over eight years without one drip. Have installed a couple dozen more. Biggest problem people have is due to overtightening the compression fittings. Hand tight and one turn with a wrench is plenty.
I use the bulk 1/8" line that you buy by the foot at the auto parts, it goes straight rather than trying to coil back up like the stuff that comes with kits. The 1/4" protective tubing slipped over the small line makes it much easier to deal with, no kinks.

 

Good thinking, I'm preparing to install my gauges, I think I'll get some 1/4" for the fuel and boost. You didnt terminate the 1/4", just butt it into the 1/8" compression fitting? Maybe a few wraps of electrical tape or some heat shrink tube?

The line to my mech. oil pressure gauge in my Jeep leaked on my passengers foot. I thought it was pretty funny, but he didnt see it that way