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what does a fuel lift pump do and what is the reason for a high idle switch? i am guessing a fuel lift pump, lifts fuel but why and is a high idle switch for cold weather or something. I just got my first diesel and know nothing about them but this site is awsome. I am learning a lot.
 

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the lift pump is needed to prevent outgassing on some filter setups. not needed on a stock truck


The high idle wire is used to activate the PTO function in the pcm mainly for cold weather folks warming there trucks up.


Eric
 

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Also Eric,


What setups is the lift pump needed on.... I have been running a racor r60 pre-oem with no trouble.... But should I have a lift pump also.... running the 90 hp juice.....





Thanks


Brian
 

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crane, yes, the high idle will work.


ISNMU, the Racor setup does not require a lift pump not does the juice. your fine.


Eric
 
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