I've got fuel mileage prolems withmy dodge ram 1500 can anyone help me?

Question

Ive got a 1999 ram 1500 quad cab with a 5.2l 318 engine. I normaly run regular unleaded fuel, I've installed a K&N air filter, quaker state synthetic oil, double platumin autolite plugs, and the napa belden silcone wires, I've also enlarged the tires to LT265-75r16 using the factory rims. on the highway i get on average (with the a/c OFF) about 13 to 14 mpg. If I turn ON the A/C, forget it, it drinks fuel like a can of beer! what else can i do to get better mileage?

Answer 1

The best fuel mileage will be with everything factory. And go with the original size tires.

Answer 2

Io you know about the on board computer. You need to go to Auto Zone and buy the manual that goes with your truck. Make sure it's the one that has the trouble shooting section and any of them will have the codes for the computer. Some other stores have them also.

if you have the codes here is how it works. Turn the ignition off, then turn it to accessory, then off, then on to accessory, then off then on (three times jor up to five) then leave on . Look at the "check engine light". It will start to blink and you may have to run the test a couple of time. Anyway the thing will blink once, then skip,then blink say two times in a row. This means 12, it may then blink twice and then five times (that's 25 or oxygen sensor), then if it blinks five times and then five times or code 55 means the test is finished.

If it's the 02 sensor, you'll need a $25 tool for that and is behind the tranny. Hope this helps, if you already know sorry it didn't help. Take care.

Answer 3

nicely, your no longer driving a motor vehicle that could get very solid mileage. What are you able to do to maximise your mileage? one million) sparkling Air clear out 2) Tires at Max stress. 3.) get rid of tailgate, or bypass away it down or positioned a sort of information superhighway strap tailgates as against the forged steel one. 4) if your 1500 could be left in 2 wheelcontinual devoid of the front hubs being locked, which will help. 5) exchange all oils, engine, transmission and differential oils to guy made. Amsoil Oil is the suitable and makes each and every of the oils you opt for, you will ought to hit upon a broker on your section or bypass online and develop right into a nicely-liked client. 6) be sure your spark plugs are sparkling and gaped wisely and your timing is solid. 7) Idling is a mileage killer, no morecontinual thrus, no jack rabbit starts off, and anticipate the site visitors lights! extra gasoline could be saved via no longer working up the the lights just to jam on the breaks than human beings comprehend. anticipate and coast!

Answer 4

If it has a cat=it might be pluged at that age> Go to dodge forum .com they have a lot of performance info that will tell you what you can or shouldn't do>>Some up grades get worse miliage as the computer is fooled and thinks it getting to much air and dumps fuel or leans it out so you have to keep your foot into it to keep it going>>Good luck searching>

Answer 5

Thats a heavy truck and engine you might get promises for better mileage, But you are getting about the best you can with what you have.

Answer 6

It been my experience that if you replace the plugs with those fancy, ones this particular vehicle occasionally runs worse. Change back to the manufacture recommended plugs and you will see a difference.

Answer 7

honestly that's about it ,those didn't get the best gas mileage in the world,the best i have ever seen one of those get is around 18 and that was with a programmer,you might want to check this site out they have some good programmers,good luck with it,, http://www.dodgeforum.com/m_753336/tm.htm

Answer 8

get a diff. truck...dodges have always been horrible on gas. my chevy gets 20 on the highway, and that's with the 350.

Answer 9

probley your gear ratio in the rear end