My fuel pressure gauge has been working fine for about a month now but today when I hardly hot the throttle just getting up to 25 my pressure drops from 18 ideling to 10 if I really get on it the psi goes to 8 I have the raptor 100 also I have the gauge ran right off my life injection pump on the inlet banjo bolt the Stella line runs into the cab then I had to put
The snubber on backwards onto the back of the gauge I am having aloooooooooot of chattering like very bad I'm about to kill the gauge

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Here's a video of the

 

Change fuel filter lately? check screen on inlet side of raptor? startin simple...

 

Think your guage took a .....

 

I'll check both Saturday.

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I just bought it literally a week ago

 

Looks like the snubber isn't doing its job and letting pulses of the pump through to the gauge.You might want to try a needle valve and barely crack it open to numb the gauge down.

 

It's smoking pretty white this morning too

 

The snubber should have been as close to the VP44 as possible. Relocate the snubber, replace the gauge, and see what happens.