I need help to improve gas mileage...

denverdave · 11-17-2010, 06:36 AM

I see a thread on here what is your gas mileage but would like some tips on what to do to improve my gas mileage, I am a mail carrier and I don't know if anything will help with all the start and stopping but even if I can improve it 2 or 3 mpg it would be worth it. My average now is 10 mpg. My Jeep is a 2000 Jeep Cherokee Limited ALL STOCK.

warthog · 11-17-2010, 06:53 AM

Quote:

Originally Posted by denverdave

I see a thread on here what is your gas mileage but would like some tips on what to do to improve my gas mileage, I am a mail carrier and I don't know if anything will help with all the start and stopping but even if I can improve it 2 or 3 mpg it would be worth it. My average now is 10 mpg.

Are you stock?

freegdr · 11-17-2010, 07:17 AM

search on line hydrogen xj gets like 45mpgs

KY_Bob · 11-17-2010, 07:43 AM

I replaced every fluid from front to back, replaced the spark plugs, found optimal air presure, and installed more efficient injectors. I went from 12ish to a reported 19.5 on the highway from the on board computer. It is a 2000 Sport with 27" tires.

for injectors, do a search on "Neon Injectors", they are 4 port instead of the older 1 port and atomize the fuel better.

dukie564 · 11-17-2010, 08:37 AM

"703" injectors
full tune up / fluid change
optimal air pressure, low rolling resistance tires
better flowing exhaust

o2 sensor (upstream) may not be operating at 100%. May be worth changing for a new one - GREATLY affects air/fuel mixture and gas mileage

No4x4Yet · 11-17-2010, 08:52 AM

http://www.cherokeeforum.com/f2/imporving-xj-mpg-37071/

XJ Stryker · 11-17-2010, 09:34 AM

10 MPG are you sure your guage is accurate. I get better than that lifted.

warthog · 11-17-2010, 09:36 AM

Quote:

Originally Posted by XJ Stryker

10 MPG are you sure your guage is accurate. I get better than that lifted.

Yeah that why i asked if he was stock, BC according to his Avatar he is. Somethings not right if hes only getting 10MPG stock

Reefmike · 11-17-2010, 10:03 AM

Quote:

Originally Posted by dukie564

"703" injectors

IIRC, a 2000 would use the "784" injector.

Lose some weight if you can. If you have factory skids and don't wheel it, yank 'em. Trailer hitch and don't pull a trailer? Yank it.

denverdave · 11-17-2010, 10:12 AM

I am a rural mail carrier I drive 60 miles a day on my route and stop and start around 450 times in a 5 hour period. I don't get much worse when I have it in 4 wheel drive all day.

freegdr · 11-17-2010, 10:13 AM

takeing out of four wheel drive will help a lot

denverdave · 11-17-2010, 10:13 AM

Quote:

Originally Posted by Reefmike

IIRC, a 2000 would use the "784" injector.

Lose some weight if you can. If you have factory skids and don't wheel it, yank 'em. Trailer hitch and don't pull a trailer? Yank it.

I am no mechanic but my mechanic specializes in Jeep's, it a 784 injector a jeep cherokee? I am just looking for ways to improve my mpg without breaking my wallet, Does putting a magnaflow exhaust on help?

Scorpion8 · 11-17-2010, 10:21 AM

Quote:

Originally Posted by denverdave

I am just looking for ways to improve my mpg without breaking my wallet, Does putting a magnaflow exhaust on help?

The single most effective fuel-economy trick is to keep your foot out of the gas. Avoid jack rabbit starts, do 55 on the highway when everyone else is doing 70, coast when you approach a stoplight, don't idle the engine for too long. It'll lower your stress level too.

dukie564 · 11-17-2010, 10:24 AM

784 injector (Bosch 0280155784) is an upgrade (4 holes instead of 1 hole) for 2000-2001 cherokees that allows better atomization of fuel and better gas mileage / smoother running as a result.

They usually (but not always) can be found in the vehicles listed on this page:
http://www.fuelinjector.citymaker.co...25/4735807.htm

Reefmike · 11-17-2010, 10:36 AM

Quote:

Originally Posted by denverdave

I am no mechanic but my mechanic specializes in Jeep's, it a 784 injector a jeep cherokee? I am just looking for ways to improve my mpg without breaking my wallet, Does putting a magnaflow exhaust on help?

Quote:

Originally Posted by dukie564

784 injector (Bosch 0280155784) is an upgrade (4 holes instead of 1 hole) for 2000-2001 cherokees that allows better atomization of fuel and better gas mileage / smoother running as a result.

They usually (but not always) can be found in the vehicles listed on this page:
http://www.fuelinjector.citymaker.co...25/4735807.htm

^^^What he said

11-17-2010, 07:17 AM	#3
freegdr CF Veteran 1989 Jeep Cherokee Join Date: Mar 2010 Location: in our own home hollywood, florida Posts: 25,129 My Photos 1989 xj sport 2dr Cherokee Engine: 4.0 neon injectors Transmission: 5speed 2000 nv3550 Transfer Case: 231 sye 2000 tj Front Axle: dana30 410s Rear Axle: 8.25 29 spline lunched Tires: 38/15.5/15 ground hawgs Lift Specifications: 13 front 12 rear Misc Accessories: a lot of foul language,skin ,cuts and bruises and a lot of blood	search on line hydrogen xj gets like 45mpgs __________________ its all in your altitude,horn broke watch for finger

11-17-2010, 08:37 AM	#5
dukie564 ::Superstar Moderator:: 1995 Jeep Cherokee Join Date: Nov 2009 Location: Hanover, MD Posts: 12,290 My Photos 1995 Cherokee Engine: 4.0L HO I-6, 703 Injectors Transmission: AX15 5-speed, Hand Throttle Transfer Case: NP231 Front Axle: Dana 30, High Pinion, 27-spline, 3.07 Gears Rear Axle: Chrysler 8.25", 27-spline, 3.07 Gears, Lock-Right locker Tires: 33x12.5x15 Mickey Thompson Baja MTZs on 15x10 Procomp series 98 wheels Lift Specifications: 4.5" Homebrew, HD Offroad Shackle Brackets, Teraflex 9550 Shocks, Currie LCAs, Iron Rock DS trackbar Misc Accessories: Homebrew cowl snorkle, HD Tow hooks, Gas tank Skid, Skid Row TC Skid, RCX D30 Skid, H4 conv, FM40	"703" injectors full tune up / fluid change optimal air pressure, low rolling resistance tires better flowing exhaust o2 sensor (upstream) may not be operating at 100%. May be worth changing for a new one - GREATLY affects air/fuel mixture and gas mileage __________________ 1995 XJ Cherokee Sport 4.5" Frankenstein Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked) 33x12.5 Mickey Thompson Baja MTZ Tires 272,000 mi and runnin' strong RIP Brian "96_XJ" Perrine - You will be greatly missed... Selfless over Selfish Project Danger Cart - A super-powered, high-tech vehicle designed by a genius, or perhaps space aliens August 2012 Cherokee of the Month! 2012 Cherokee of the Year!

11-17-2010, 09:34 AM	#7
XJ Stryker The CF Moderator 2006 Ford F-150 Join Date: Apr 2008 Location: Smiths Station, Al Posts: 7,599 My Photos 87 Wagoneer Engine: 4.0 I6 Transmission: AW4 Transfer Case: 242 Front Axle: Dana 30 4.56 gearing spartan locked Rear Axle: Dana 44 4.56 gearing spartan locked Tires: 33in Good Year MT/R Lift Specifications: RC 4.5in lift Misc Accessories: Lots of Rust. Saints stickers	10 MPG are you sure your guage is accurate. I get better than that lifted. __________________ 1987 Tan Jeep Wagoneer 4.0L 242 4.5 RC on turdy tree's 2006 F-150 King Ranch 5.4L V-8 Triton Check out my Waggy build here!

11-17-2010, 10:13 AM	#11
freegdr CF Veteran 1989 Jeep Cherokee Join Date: Mar 2010 Location: in our own home hollywood, florida Posts: 25,129 My Photos 1989 xj sport 2dr Cherokee Engine: 4.0 neon injectors Transmission: 5speed 2000 nv3550 Transfer Case: 231 sye 2000 tj Front Axle: dana30 410s Rear Axle: 8.25 29 spline lunched Tires: 38/15.5/15 ground hawgs Lift Specifications: 13 front 12 rear Misc Accessories: a lot of foul language,skin ,cuts and bruises and a lot of blood	takeing out of four wheel drive will help a lot __________________ its all in your altitude,horn broke watch for finger

11-17-2010, 10:24 AM	#14
dukie564 ::Superstar Moderator:: 1995 Jeep Cherokee Join Date: Nov 2009 Location: Hanover, MD Posts: 12,290 My Photos 1995 Cherokee Engine: 4.0L HO I-6, 703 Injectors Transmission: AX15 5-speed, Hand Throttle Transfer Case: NP231 Front Axle: Dana 30, High Pinion, 27-spline, 3.07 Gears Rear Axle: Chrysler 8.25", 27-spline, 3.07 Gears, Lock-Right locker Tires: 33x12.5x15 Mickey Thompson Baja MTZs on 15x10 Procomp series 98 wheels Lift Specifications: 4.5" Homebrew, HD Offroad Shackle Brackets, Teraflex 9550 Shocks, Currie LCAs, Iron Rock DS trackbar Misc Accessories: Homebrew cowl snorkle, HD Tow hooks, Gas tank Skid, Skid Row TC Skid, RCX D30 Skid, H4 conv, FM40	784 injector (Bosch 0280155784) is an upgrade (4 holes instead of 1 hole) for 2000-2001 cherokees that allows better atomization of fuel and better gas mileage / smoother running as a result. They usually (but not always) can be found in the vehicles listed on this page: http://www.fuelinjector.citymaker.co...25/4735807.htm __________________ 1995 XJ Cherokee Sport 4.5" Frankenstein Homebrew Lift, 4.0L HO I-6, AX-15, NP231, D30(Open)/C8.25(Locked) 33x12.5 Mickey Thompson Baja MTZ Tires 272,000 mi and runnin' strong RIP Brian "96_XJ" Perrine - You will be greatly missed... Selfless over Selfish Project Danger Cart - A super-powered, high-tech vehicle designed by a genius, or perhaps space aliens August 2012 Cherokee of the Month! 2012 Cherokee of the Year!

11-17-2010, 07:43 AM	#4
KY_Bob Junior Member Garage is empty, add now Join Date: Jun 2010 Location: Kentucky Posts: 52 My Photos 2000 Cherokee Engine: 4.0L Transmission: Automatic Transfer Case: Stock Front Axle: Stock Rear Axle: 8.25 Chrysler Tires: Uniroyal Liberators 29" Lift Specifications: None Misc Accessories: None	I replaced every fluid from front to back, replaced the spark plugs, found optimal air presure, and installed more efficient injectors. I went from 12ish to a reported 19.5 on the highway from the on board computer. It is a 2000 Sport with 27" tires. for injectors, do a search on "Neon Injectors", they are 4 port instead of the older 1 port and atomize the fuel better.

11-17-2010, 08:52 AM	#6
No4x4Yet Senior Member Garage is empty, add now Join Date: Jul 2010 Location: Long Island NY Posts: 889 My Photos 2000 Cherokee Tires: 31x12.5 pro comps Lift Specifications: BB	http://www.cherokeeforum.com/f2/imporving-xj-mpg-37071/

11-17-2010, 10:12 AM	#10
denverdave Newbie Garage is empty, add now Join Date: Nov 2010 Location: Missouri Posts: 10 My Photos 2000 Cherokee Engine: 4.0 Transmission: automatic Transfer Case: stock Front Axle: stock Rear Axle: stock Tires: 10 ply Lift Specifications: stock	I am a rural mail carrier I drive 60 miles a day on my route and stop and start around 450 times in a 5 hour period. I don't get much worse when I have it in 4 wheel drive all day.

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11-17-2010, 10:36 AM