its all good i get my parts at wholesale. real cheap so i dont mind buyin parts. Plus the jeep has about 170,000 on it and i bet the original owner didnt change anything out.

 

And i did install and clean each part one at a time and it was the o2 sensor. The thing was all rusted.

 

Well it still seems like it has a rough idle. Anymore ideas because im lost at this point

 

Stupid question but how are you calculating your mileage? And are you adjusting for larger tires. I forgot about having larger than stock tires and figured I was getting 11mpg but I have larger tires than stock so its probably 14-15ish still needs improvement.

 

Rough idle- one word

SEAFOAM

 

i Just used seafoam so lets see.

 

I have 235/75/15 tires. there bigger then stock right or are they stock?

 

they are a bit bigger than stock but not much

 

cool so how much would that change gas mileage, by like 1 or 2?