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Antifreeze...just pull the top fitting that leads to the gauge, and fill the isolator to the top of the threads with antifreeze. you don't need to bleed it at the gauge unless you have a very long length tube leading to the gauge.
 

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Discussion Starter #5
well there are no leaks now but i am getting two different readings the edge read 15psi and the gauge reads 13psi any reason for this
 

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That's a good one...I don't know a whole lot about the Edge Attitude, doesn't it read off of the computer?? That could be the reason, or you could have air in you isolator, try bleeding the isolator from the fuel side and see if that helps
 

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Oh, you might have some dirt in it then. If your going to have the gauge hooked up to the filter bowl, I'd recommend putting it in the top test port, less of a chance of picking up dirt
 

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well there are no leaks now but i am getting two different readings the edge read 15psi and the gauge reads 13psi any reason for this
Reason for this is the aiur bubles in the isolators will give a offset. The whole isolator thing has been a problem with keeping a accurate number. Most people get frustrated and yank out the isolator because everytime there is a low pressure problem you must pull the isolator out to verify if the isolator is the cause of the fuel system. So most people install a needle valve and skip the isolator. Then you always have true pressure reading and if anythiny fails you can pull over and shut the valve.
 

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Hey Mike, do you have a write up on doing that? My isolator and gauge work fine for a few months, than I loose the reading completely and have to pull everything apart and re do it. It gets annoying.

Also, my length of tubing is pretty long...so would it help if I shortened it quite a bit this time?

Thanks for your help.
 

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