Is it the Isolator?
12-07-2008, 01:56 PM
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Is it the Isolator?
Afternoon DTR, Running an Isspro FP gauge off the fuel filter with an isolator. Normal pressure is 16 at idle down to 12 WOT. Now that the temps have fallen to 30 degrees my pressure reading is up around 26. Sometimes it even goes up as rpm's increase! I didn't do the install so I am not sure if the wrong fluid is in the line running to the gauge. Feel free to chime in with any and all suggestions.
12-07-2008, 03:57 PM
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Does the pressure go down when it warms up.
I need to fill my isolator every six months with
new antifreeze . My pressure is high when I start
in the morning from fuel being denser.When fuel
warms up it's normal.
I need to fill my isolator every six months with
new antifreeze . My pressure is high when I start
in the morning from fuel being denser.When fuel
warms up it's normal.
12-07-2008, 05:52 PM
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Can't say if it goes down since I have been using the truck for short hops. It does seem very temp dependent so maybe the antifreeze change will work. In a sealed system I didn't think it would "wear out". Not sure how to change it, do you just unhook at the isolator?
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