1st. My knock sensor is broken clear off. I know how to fix it. My question is will it better my mpg if i fix it?
2nd. my O2 sensor is bad should i just get one from the wrecking yard? and how bad does it kill my mpg being broken?
3rd. I went to take my shift nob off and it wont unscrew any more. instead my hole shifter arm unscrews kinda hard to explain but how can i fix that?

thanks
clint

 

1st- not sure, letting sombody else get this one..

2nd- Get a OEM replacment from www.sparkplugs.com for CHEAP!. Yes it can effect your mpg pretty heavily.

3rd- sounds like the glue holding the metal shifter in the rubbery part (top) of the shifter came loose. Remove the shifter, pull the shifter apart, apply some VERY strong glue or adhesive, put back together!

 

on that spark plugs.com i cant find o2 sensors

 

never mind i figured it out. how do i tell if it was a cali one or not?
and my timing chain and pvc vaulves to my knowledge have never been replaced shoud this be done? and will it run at a smoother idol? and get better mpg?

 

cali one if you nee to e test your truck

 

how do i know if its the cali one though?

 

You will have a pre and a post cat o2 sensor.
If its a regular truck it will just have a pre-cat o2 sensor.