No, it is not OK.

 

the truck don't have any o2 sensors I guess its throwin the codes bcz there not there.....an I think bcz of them bein missin that it has thrown so much extra fuel that it has clogged my cat up....

 

Running rich won't clog the cat. Burning oil will.

The hit you take on fuel economy is more costly than the sensor, but if you're burning oil you need to fix that because it's going to end up costing even more even if you yank the cat out.

 

find the plugs for the 02 sensors and replace them. there is no way your truck can run properly with out them in place.

 

Yea I kno my gas mileage is prolly suckin right now but that's the way I bought the truck an it's not burning any oil oil is spot on

 

well i would get new o2 sensors, install them and see how it does, if all is well then good, but if it still wont go over 3k rpm, i would take the sensors out of the pipe and then gut the cat. then put the o2 sensors back in and see how it does, if its fixed then u can leave it like this since u have no emissions or put a hi-flow cat on. your choice.

 

how much are the o2 sensors? there is just 2 right one up stream an 1 down stream?

 

If your truck is 96 or newer, with a v-8, and you have federal emissions, then yes. Don't worry about the post cat sensor, unless you are getting a code for it. Rock auto has a good deal on NTK O2 sensors, think they are under 30 bucks.

 

NTK is the way to go for sure.

 

then ill order the upstream one an see how it does first I guess