I had my 2001 go into limp mode due to air getting past the primer on the filter head. I vaccuum tested it my self , the problem was self caused.... I got a bad tank of fuel that had high water content and cloged the filter up on a very cold AM . I desided a quick fix was to limp home (2 miles) and put a 150 watt drop light on the filter housing and warm up the fuel (not a good ideal) . this over heated some of the plastic parts in the primer section causing them to change shape some. Well it seams it would go down the road fine for 40~60 mile as long as you didnt pull anything or as for full power for more then 2~3 seconds. It would go in to limp mode where it would only rev to about 1800 rpm and had maybe 75 hp . you could pull over and turn the truck off and restart it and 70% of the time it was fine some times you had to hit the primer bulb 5~6 times and it was fine after that. Dealer told me at the time a new housing was 500.00 getting a break on parts (20 mins to install) , best part was it was on national back order and I had to wait 35 days to get one..... WRONG , traded in that truck that week , and forgot about the problem! I would guess that JK filter / pump set up would have fixed that issue and made the rest of the fuel system last longer.
93 c-2500 6.5td,96 6.5td x cab,01 GMC lb7 Xcab ,2004 lly crew cab ,2006 lbz crew cab,honda CBR1100xx,2003 polaris prox 700 , 2001 31' holiday rambler 10K lbs house on wheels!