Poor millage suddenly

Millage has gone down and I noticed idle is not as smooth. Changed air filter, but no change. 267,000 miles and no leaks. Runs fine, just eating more fuel.

 

Maybe time for a tune up? When's the last time you had the spark plugs changed out?

 

Clean throttle body?
Clean MAF?

 

Is it just one tank of fuel? Maybe you got some bad gas. But I agree this seems likely.

 

This.

Check tire pressure and try a bottle or two of lucas fuel additive. Didn't expect it but it helped tremendously after 2 bottles.

 

New plugs 10/15

 

Clean MAF? Clean throttle body?

 

What am I? Invisible?

 

Who said that?

 

That was me asking what you meant

 

OP, how many miles are on your truck? Maybe look into replacing the fuel filter, they're cheap and easy to do yourself.

 

Will start with fuel filter

 

267000

 

seafoam through intake for any build up?

 

What is seafoam?

 

it's bullshit it what it is (mostly)

it solvent that you burn on a running motor

an LOL it makes smoke it must be working

do a normal throttle body off cleaning and skip the magic snake oil

or not

 

yup total bullshit is how you form a successful company and gain the praise of many certified techs. If you don't think seafoam works than I guess you have never seen a real before and after picture of the top of a cylinder taken with a borescope.

To each their own my $.02 is to try it out and if it doesn't solve your problem you only spent 7 bucks and you have less buildup inside your cylinders.

To answer your question op it is a fuel additive you can find at any auto parts store or walmart. If you google it you can find tons of information and videos of it being used hope this helps

 

https://www.youtube.com/watch?v=Ks0IRj_kRYs
Same kinda thing, this guy's voice drives me crazy

https://www.youtube.com/watch?v=JIfWG3V1_Zg

 

it's bullshit to a large degree

I have borescopes and experience

and sucking distilled water in just like seafoam does the exact same
thing to shatter carbon off the head, [except clean the intake leading up to the cylinder]

what really works though, is opening up engine and doing it right.


whatever... though ...it's all tune-up in a can, that is what I am calling bullshit.

 

Its not some say all end all. Im simply saying that it works knocking the carbon off of the head including the intake. With what op described he could have some build up issues that this could help with. He should still inspect his plugs.