Topic: Does the fuel tank vent tube mod work on the '99?

[omnisi]

I may finally have time this weekend to do it.  But I wasnt sure if it will work on the '99.  Anyone done it on a '99?

Right now, when my fuel light comes on, I can usually only put 11-12 gals. in it.  I would love to have more range.

Thanks

[jagular7]

I have the same problem with filling. Do the work, take lots of pics with step-by-step instructions, then let us know how it turns out. I know I'd appreciate it. 

[omnisi]

It would be nice to know if Im starting with a 19 gal or a 15 gal tank...

[Sidscan]

One of the important things discussed is making sure your tank is actually 19 gallons to start with.  If you don't know you can request your build sheet from jeep.com with your vin number.

http://www.jeep.com/owners/index.html

Here is a link to a TJ writeup

http://bigredheep.com/modules.php?name=ForumNews&id=3934

and some discussions on another board. With a lot of detail links.
http://www.jeepforum.com/forum/showthread.php?t=325596&page=2&highlight=increase+tank+gallons

My build sheet says I have a 19 gallon.  I just don't have enough time to modify mine.

[omnisi]

Where do you click on the link to get a build sheet?

[Sidscan]

I don't remember exactly how I got there.  I went back to see what I did and here is the link to the page I requested it from.  I told them in the additional comments that I had just purchased the jeep from a previous owner and wanted my build sheet for my informational  reference.  My return email looked like this.

Thank you for your email to DaimlerChrysler Motors Corporation regardingyour vehicle.  According to our records, your vehicle was equipped from the factory with the following:  *K5  -  Cloth High-Back Bucket Seats  -C3  -  Mist Gray  ALAP -  SE Decor Group  APAS -  Monotone Paint  A22P -  2.5L Engine(EPE)/3Sp Auto Trans(DGD  BAHS -  81 Amp Alternator  BCDP -  500 Amp Maintenance Free Battery  BGAS -  Power Front Disc/Rear Drum Brakes  CADP -  High Back Bucket Seats  CDBS -  Reclining Front Seats  CFMP -  Rear Folding Seat  CGWS -  Next Generation Front Air Bags**  CKES -  Front Seat Area Carpet  CKFP -  Rear Seat/Wheelhouse/Cargo Carpet  CKRP -  Cargo Net  CKTS -  Cargo Tie Down Loops  CUMP -  Mini Floor Console   DGA  -  All 3-Speed Automatic Transmissions  DGDS -  3-Spd. Automatic 30RH Transmission  DHAP -  Lock-Up Torque Converter  DHNS -  Command-Trac Part Time 4WD System  DJJS -  Dana 30/186MM Front Axle  DMEP -  3.73 Axle Ratio  DRJS -  Dana M35/194MM Rear Axle  EAAC -  All Engines  EPE  -  2.5L Power Tech I-4 Engine  GBBS -  Tinted Windshield Glass  GCCS -  Plastic Front Door Window  GCHS -  Half Metal Doors with Locks  GRVP -  Left Manual Mirror  GSVP -  Right Manual Mirror  GTVS -  Swing-Away Mirrors  GVAC -  All Vehicles W/O Power Mirrors  HCDS -  Heater w/Instrument Pnl Ventilation  JAYS -  Instrument Cluster w/Tach  JCDS -  100 MPH Primary Speedometer  JHAP -  Var Intermittent Windshield Wipers  JJBS -  Dual Note Electric Horns  JJJS -  12V Auxiliary Power Outlet  JKAS -  Locking Glove Box   KWPS -  STRIPE/BADGE/MOLDING/COLOR  KXPS -  STRIPE/BADGE/MOLDING/COLOR  K3ZP -  STRIPE/BADGE/MOLDING/COLOR  LMAS -  Halogen Headlamps  LPSS -  CHMSL Lamp  MBAS -  Painted Front Bumper  MB5P -  Black Rear Bumper  MCHP -  Bumper Extensions  MFPS -  Chrome Headlamp Bezels  MFRS -  Black Front Frame Overlay  MFTS -  Body Color Grille  MRJ  -  Bodyside Side Steps  MWBS -  Sport Bar w/Side Padding  NAA  -  Federal Emissions  NBKS -  EVAP Control System  NF1  -  19 Gallon Fuel Tank  PX8A -  Black Clear Coat   QX8S -  Black Clear Coat  RA8P -  Delete Radio  SBAP -  Power Rack and Pinion Steering  SCG  -  Leather Wrapped Steering Wheel  SDAP -  Normal Duty Suspension  SHAS -  Front Stabilizer Bar  SHCS -  Front and Rear Stabilizer Bars  SUA  -  Tilt Steering Column  TBCP -  Compact Spare Tire  TBRS -  Outside Tire Carrier  TPNP -  P205/75R15 Wrangler RT/S AT Tires  TZAS -  Goodyear Brand Tires  VJXP -  Black Soft Top  WJKP -  15X6.0 Styled Steel Wheels  WLYC -  All Steel Wheels  XEA  -  Tow Hooks  XEES -  Fuel Tank Skid Plate Shield  XEFS -  Transfer Case Skid Plate Shield  XJFS -  Tethered Fuel Filler Cap  YAAS -  Build To U S Market Specifications  YEP  -  Manuf Statement of Origin  YGFA -  8 Additional Gallons of Gas  ZAEP -  Spring - Left Front  ZAUP -  Spring - Left Rear  ZNEP -  Spring - Right Front  ZNUP -  Spring - Right Rear  Z5AS -  GVW/Payload Rating   1AAS -  U.S. Dealer Retail  172S -  Zone 72-Portland  2TBA -  Customer Preferred Package 2TB  22B  -  Customer Preferred Package 22B  3VDA -  Customer Preferred Discount  4XA  -  Air Conditioning Bypass  5ISS -  TJ-Vehicle Family  5IWS -  JS-Vehicle Family  6X2  -  Paint Order Code  648S -  Washington State Code  948S -  Washington State Code  If I can be of any further assistance please let me know. Thanks again for your email.          Sincerely,  Josh  Senior Staff Representative Chrysler Group Customer Assistance Center For any future communications related to this email, please refer to thefollowing information:

Only formated alot better.  Here is the page I used.

http://www-5.jeep.com/wccsapp/universal/J/index.jsp?appStr=wccs&titleStr=Contact+Jeep&familyStr=brand&franchise=J&actionURL=%2Fwccs%2Fbrand_forms%2Fus%2Fwebform.jsp&promotion=null&category=R

[Jeffy]

I may finally have time this weekend to do it.  But I wasnt sure if it will work on the '99.  Anyone done it on a '99?

Right now, when my fuel light comes on, I can usually only put 11-12 gals. in it.  I would love to have more range.

Thanks

This is for YJ's but it sorta applies to TJ's too.  http://4bangerjp.com/forums/index.php?topic=10.0

The difference is that there is that the vent is molded to the tank and there is a roll over check valve on the end.  Some people have cut the vent off to get 19 gallons.

[omnisi]

Thanks guys.

I guess my main question or issue is, that I want to be sure Im starting with a 19 gal tank.  i would hate to do it only to find out it was a real 15 gal tank to start with...

[Jeffy]

Thanks guys.

I guess my main question or issue is, that I want to be sure Im starting with a 19 gal tank.  i would hate to do it only to find out it was a real 15 gal tank to start with...

Jeeps haven't come with an actual 15 gallon tank since 1990.

[omnisi]

Thanks Jeffy!  Thats what I was looking for.  Maybe Ill try to tackle it this weekend.  Ill post the results afterwards.

Thanks again

[chardrc]

Jeeps haven't come with an actual 15 gallon tank since 1990.

ounce again another cheap mod that i cant do because my jeep is 1 year to old

[Chad]

I got a 99 too and waiting for writeup would love the extra range when i'm driving through the dakota's.  Whats the word Omnisi?

[omnisi]

I got a 99 too and waiting for writeup would love the extra range when i'm driving through the dakota's.  Whats the word Omnisi?

Im going to do it on Saturday.  Ill take a few pics and let you know how it goes. 

[omnisi]

Did the fule tank mod today following this link:

http://bigredheep.com/~jeepwra/forumnews-id-3934.html


Didnt take pics...hands were too greasy for nice camera.  Anyway the fuel pump definitely said TJ15 gal.  From the pics, I thought the vent tube would be a 'hose', but it isnt.  Its a molded plastic tube...like PVC.  So, I forgot to get some PVC cutters so I used a small pipe cutter to cut it off.  I did NOT cut off the filler/check valve tube, only the smaller vent tube.

Results:  I went straight to the gas station and put 19.1 gal in the tank.  It was a little lower than I usually let it get before I fill it with about 11 gal.  But even if it  was 2 gal lower (13 gal low) it still took an easy extra 5-6 gal.  Glad I did it...at 18-20 mpg, thats an extra 100 miles of range.  Not bad...

 

[Jeffy]

Did the fule tank mod today following this link:

http://bigredheep.com/~jeepwra/forumnews-id-3934.html


Didnt take pics...hands were too greasy for nice camera.  Anyway the fuel pump definitely said TJ15 gal.  From the pics, I thought the vent tube would be a 'hose', but it isnt.  Its a molded plastic tube...like PVC.  So, I forgot to get some PVC cutters so I used a small pipe cutter to cut it off.  I did NOT cut off the filler/check valve tube, only the smaller vent tube.

Results:  I went straight to the gas station and put 19.1 gal in the tank.  It was a little lower than I usually let it get before I fill it with about 11 gal.  But even if it  was 2 gal lower (13 gal low) it still took an easy extra 5-6 gal.  Glad I did it...at 18-20 mpg, thats an extra 100 miles of range.  Not bad...

 

As it should.  The senders are set to 15 or 19 gallons.  The gauge will now read F till you run it down to 15 gallons.