gas mileage

[tonyb11]

hey fellas new to the forums here and hopin someone can help me out.. i have an 03 1500 w/ 4.7 and was getting around 15 - 18 mpg. within the last month or so its droppd to 10 - 12 mpg with no codes or lights on. i cleand the throttle body and did a tune up around 10,000mi ago?? should i try another tune up or i was told it could be 02 sensors..any ideas or help appreciated

 

[ramhunter9]

When was the last time you cleaned the fuel system ( fuel treatment like lucas or sea foam ? ) done a hard re set on the computer ?
Also you say full tune up ? Did you replace plugs ? If so make sure they are all gaped properly , always check them out of the box .

 

[ramthis9501]

Another good treatment is STP... It cleans not just the system but the injectors to. I've noticed a difference in mileage myself

 

[ramhunter9]

oh and welcome to RF , stick around we are a good group of guys and gals

 

[03MopaRamman]

Does Winter have anything to do with it...LOL?.

I got limp mode after 20 seconds upon start-up today as my ported Tb didn't like the - 40 **** with wind chill and this week my average is 27.8L/100 Km on the overhead (8.1 US). Just a thought! But agree Plugs could do it but certainly the plug wires if original (for sure) would make ya burn more.


Oh ya BTW Welcome!

 

[ramthis9501]

Yeah welcome!

 

[KGBIGCOUNTRY]

Im willing to bet weather is also the cause. These trucks run rich when its cold out. Welcome to the forum bud kick back and stay awhile.

 

[ramthis9501]

^^^ Mine does run pretty rich in the cold... so your probably right

 

[tonyb11]

ok thanks for the advice. i will try another tune up and hope for the best.. cant wait to check out the rest of the forum. lots of info on here!