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What is the functional use of fuel pressure instruments? I have always gone with oil temp, oil pressure and water temp but wondering what is the functional use for knowing the fuel pressure on a NA car?
 

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To see if fuel filter is dirty and if fuel pump is working properly.

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...and to monitor fuel delivery issues at WOT...
 

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Just as important

Starving a engine of fuel in any application "Lean Condition" is never good. You can burn up plugs or worse.

T Wayne in Iraq
 
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