07-01-2003, 07:03 PM
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#1 (permalink)
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Join Date: Apr 2003
Location: Utah
Posts: 404
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Mechanical FP gauge story and ??'s
Two weeks ago I measured my fuel pressure with a hand held gauge at the schrader valve FP = 12 psi. at idle.
This morning I had the full time Dipricol FP gauge isnstalled. It is the new white face made to match '03 gauges ( it looks good even though I have a 2nd gen ), it also has the new billet aluminum isolater. I had it installed on the steering column. When truck was first started after install the FP = 9 psi. at idle. It was an hour drive home at 80 mph and FP stayed rock solid at 9 psi even when under WOT. I shut truck off at work and FP gauge falls to 5psi when truck is off. Three hours later I go out to truck and gauge is sitting at 6 psi with truck off. I start truck up and gauge goes to 7 psi and stays there solid for entire trip ( about half hour ) will not budge off 7 psi at WOT either. And I had a stainless steel line used from the schrader to the isolater, the line seems to be giving off some sort of vibrating noise ( very annoying ).
My questions are this...
Why the difference in fuel pressure from one trip to the next ?
Why did the fuel pressure only go up 1 psi after second start ?
Is my LP dying ? 
What would a remedy for the noisy steel line be ?
Sorry for being so long winded any replies are greatly appreciated!!
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'07 2500,5.9, QC, LB, 4x4, auto, 3.73's, gauges, Air Dog, Full ATS trans Billet input and flex, Smarty, CFM+ intake horn, S&B intake, ATS exhaust manifold, DSS, Vulcan fuel module, Air Lift 5000 bags with on-board air, bed liner
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