I would check for a vacuum leak, might also explain your mileage.

 

i get 9 miles a gal lol.

1500 5.2 8v stock gears with 35's lol 1997

 

i bet u 10 dallers he has a open air filter and its very dirty killing his gas millage ;D The sound is it sucking air throw the odl and difty filter killing ur gas millage.

 

I have a 96 350. Xcab short bed and i was getting 13 HIGHWAY!!. then i replaced the Pleneum plate and plugs ect. tune up and now get about 15-17 highway. footstomper yes and over 70. more like 75. 109K and spinning

 

I found the best mod to do to get better gas milage outa the 360 is simply removing your foot from the petal lol. ahhhh who am i kidding its so much fun to make alota noise, im also averaging like 11.5 mpg lol, but i do zero highway driving.

 

I believe he might have figured that out...3 years ago. Holy dead thread Batman!

 

There are some vacuum lines under the battery that are famous on the 2nd Gen Rams for getting leaks due to fumes from the battery vents causing corrosion.

Another tricky to spot place is where the vacuum lines pass through the grommet from firewall into behind dashboard.

The 'blend door' of the heating and air conditioning system can also develop a vacuum leak that whistles inside the cab loudly.

Many MPG improvement ideas in a long read here:

https://dodgeforum.com/m_447500/tm.htm

 

haha i didnt even notice it was 3 years old.

 

damn.. yall suck.. i think i get like THREE mpg on mine.. its havin some big issues now tho.. shes pretty sick.. gonna have to tear into it and figure out what the deal is soon ..

 

It happened again!

"Newbs" Bringing back 3 year old topics lol