OOooo.. Can't wait to see how the dyno runs go. If it boosts the ponies enough and increases your mileage, I just might be able to justify the cost.

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OLD RIDE: 2005 Liberty Sport 4x4 CRD - Inferno Red, Sunroof, Cruise, Tint, Tow Package

NEW RIDE: 2008 Flame Red JK Unlimited X 24S Dual tops, Auto, PW/L, Infinity Sound system, Sirius, Tow pkg, side steps
Added: Black fuel door, 7 pin Trailer lights, uConnect + iPod kit, bikini top, AutoPage 2-way alarm, Flexatrunk

what? Boost the poneys and increase the mileage? My guess is worse mileage with more poneys and better mileage with better fuel maps. Like I said though, I dont know if Im going to get one till I can get these issues straight for a base line.

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'64 Warrior Rail
1600 DP
Duel Webber 34 ICT
Centerline rims 135/15 and 31x12's
"Do it in the Dirt"

Mudtrac, when I ran the test I believe your fuel pressure at 16000 psi. Not sure exactly but I think it was around that. That was sitting at idle. I would have to look at my manual but I believe they run at about 24000psi maxed. Has the check engine light come back on yet?? I know how you feel about going to the dealer, I spent a whole afternoon replacing the small clamp on air locker hose inside the front diff, just to avoid the down time at the dealership.

Wes

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2006 Jeep Liberty Sport (KJ4DIW) Ham / Warn 9500ti

http://www.cardomain.com/id/wesbronco

No CELs as of yet, I think to CMA Im going to take her in and drop her off and let them tell me "its all fine" so when somehting blows up they cant say I didnt try.

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'64 Warrior Rail
1600 DP
Duel Webber 34 ICT
Centerline rims 135/15 and 31x12's
"Do it in the Dirt"

Hmmm, one other quick thought. Don't think this is the cause from the sound of things, but perhaps a small air leak in the fuel system?

Going by the FSM, you can check this yourself. Disconnect the fuel hose from the outlet of the fuel filter, and install a piece of clear tubing between the filter and the hose. Reprime the filter and fuel system. Start the engine, and if I remember correctly it says to rev it up to a certain speed (can't remember what right now), and check flow thru the clear tubing for any air going thru with the fuel.

If you are getting air, you can eliminate or confirm the fuel filter as the source by repeating the procedure on the inlet side of the filter.

As far as the connection right at the fuel pump, if you can get at that one without disassembling half the engine, we'll call you Houdini.

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Mitchell Oates
'87 MB 300D Diamond Blue Metallic
'87 MB 300D - R.I.P. 12/08
'05 Sport CRD Stone White
Provent CCV Filter/AT2525 Muffler
Stanadyne 30 u/Cat 2 u Fuel Filters
Fumoto Drain/Fleetguard LF3487 Oil filter
V6 Airbox/Amsoil EAA Air Filter
Suncoast TC/Shift Kit/Aux Cooler
Kennedy Lift Pump/Return Fuel Cooler

good info, thanks.

I could see air in the line cause the engine to go crazy like it did also. Guess I know what Im doing for the holiday weekend.

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'64 Warrior Rail
1600 DP
Duel Webber 34 ICT
Centerline rims 135/15 and 31x12's
"Do it in the Dirt"

Ok from the last tank of gas,

Half tank was 218 miles - Friday
Empty light on @ 308 miles today.

I will have the gallons to fill this up after work, My guess is 18-19 gallons. which would be 16-17mpg better than 15 but still not what the norm is...

Im wondering what would happen if I just used half tanks, Im going to do my fill ups off this for week or so and do a check to see if I get better mileage off that method, in theroy that would be more like 400-440 miles per equal fill up of a full tank vs half empty if there is only 8 gallons going in. 218 into 8 gallons is more like 27mpg which would be awsome. Ill have to see what half way looks like, after todays fill up ill be half gone by friday.

when I filled up there was 312 miles and it took 18.897 gallons, which would be roughly 16.5 mpg...

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'64 Warrior Rail
1600 DP
Duel Webber 34 ICT
Centerline rims 135/15 and 31x12's
"Do it in the Dirt"

Last tank was 228 miles till half and 321 till empty had to put in 18.865 gallons so thats 17mpg yes a little better than 15 like I was getting but for a controll Ive been using the same station and pump for the last 3 fillups. Whats killing me is the getting 200+ on half tank and then till empty trying to scratch up a 100 miles. This last tank im going to fill up at half and see how much fuel it takes, and do some math there, if im getting the 24-25mpg with half a tank then Ill chill out and just know to only drive till half full. All of this driving has been highway only, I live right off the highway and my job is too, havent driven the CRD anywhere else.

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'64 Warrior Rail
1600 DP
Duel Webber 34 ICT
Centerline rims 135/15 and 31x12's
"Do it in the Dirt"

i know his pain i just filled up for the first time and put 18.5 gallons in it and only got 295miles out of the tank thats like 16 miles to the gallon what can i do maybe have the computer re flashed or what

well your first or second tank isnt going to be your best, you need time to break the engine in, and diesels take a while. I have 12K on mine and im still getting crappy milage, well its hasnt always been bad, i had gotten closer to 380 on a tank 7K miles ago, but ive been watching it drop and drop.

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'64 Warrior Rail
1600 DP
Duel Webber 34 ICT
Centerline rims 135/15 and 31x12's
"Do it in the Dirt"

okay cool i really want to lift it and put mohab and mtrs on it but not if i am going to get 11 mpg you know what i mean