Guys I have an 07 4.6 single cab nd its wasting too much gas but the check engine light does not turn on,it does not even respond or sound the same..I have a k&n Cai,magnaflow exhaust,and a performance tune but I never haul ***. Jus have it for wen I need it..I changed the oil and checked all the spark plugs nd boots,took it out for a spin nd wasted a quarter tank of gas jus driving 16 miles.....any of u guys no Wuts the problem?? I already took it to autozone to check for any codes nd nothing showed up,really need yalls help,thanx in advance..

 

..bump guys need help..could it b the o2 sensors??..cats...anything?? I've done some research here nd yall talked about checking the plug for spark while runnin,but I don't quite understand ,really don't no wut this could b

 

Half a quart of gas going 16 miles? How did you determine a half quart? I use a SCANGUAGE II to measure my MPG rate, but it does not go down to the "quart" range.

 

1/2 a Quart in 16 miles?! WOW thats some awesome gas milage 16mi x 4qts/gallon? Damn! You dont need a check engine light, you need a MIRACLE light!

I dont even get 16mpg on the best days in my 04' 5.4!

 

I filled the tank up nd set the speedometer on trip,or whatever that's called,I ran 16.3 miles to my uncles house nd it had already taken down a quarter tank ,need help guys

 

Run a full tank and find out what the average mpg is. Also, city vs hwy makes a big difference. I get 11mpg in town and 15 highway.

 

Yea the thing is I used to save a lot of gas compared to now,I burn gas drastically...idk what it could b,I have a 4.6L,k&n Cai,new royal purple oil,new ngk spark plugs,magnaflow exhaust and a performance tune which should all save me mpg

 

Are you saying that the gas gauge went down one quarter (or 1/2 of a quarter in the first post) for the distance driven?

 

Some of us are old and still use plain English. Please lose the texting stuff so we can try to help you. I still don't understand how much fuel you are using and how exactly you are determining that amount.

 

If he drove 16 miles and went through a quarter of a tank, damn he is losing major gas. You'd be able to smell you burnin through that much I would think.