Starbuck75 Posted July 12, 2013 Share Posted July 12, 2013 Hey guys my truck seems to want to run smoother at an Idle and in general with this unplugged? I'm assuming something is wrong because vacuum lines should be attached lol Link to comment Share on other sites More sharing options...
HOrnbrod Posted July 12, 2013 Share Posted July 12, 2013 Borrow or buy a fuel pressure gauge, hook it up on the fuel rail Schraeder valve port, start engine and check to see if your regulator is even functioning. You should have 31 PSI with the vacuum plugged in, 39 PSI w/o. Link to comment Share on other sites More sharing options...
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