FASS question/ fuel problems....HELP!!!

FASS question/ fuel problems....HELP!!!

03-06-2007, 06:40 AM

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JamesThomas

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Join Date: Jan 2006 Location: St. Louis, MO Posts: 996

FASS question/ fuel problems....HELP!!!

I have somewhat of a strange issue...this all started within the last 4 tanks of fuel from a station that I normally don't fill up at. I am not sure if it was LSD or ULSD cause some stations around here are and some aren't marked right yet. Any way I go start my truck, depending on outside temps it will prime between 4 and 7 psi. Then I start the truck and it will go to 8-10 psi and then slowly go up to 13-15 psi at idle. My psi has always been at 13-15 psi at idle, 12-14 cruising, and never below 11 psi at wot even in 100 degree heat. What would be causing this slow build of pressure. The pump always turns on, primes, etc. just fine. I have already changed the fuel filter and drained the separator. Which is why I don't think the brushes are sticking. Everything reads normal, just delayed. Please help! Thanks, James

__________________
2001.5 4x4 QC SB ETH, BHAF, 5" MBRP, DiPricol guages, SBC Sprung DD, Fass 150, SBC Hydros

-Old Setup-
366 hp / 1053 tq on the ground
MCS Diesel (mustang dyno) 1-20-07

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