Originally Posted by gtx6970
Originally Posted by VCODE
Originally Posted by gtx6970
Yep, Need the codes there Bob .

Or else anything is a guess

BUT, best I remember they're not known for repetitive O2 sensors failures
Did you use OEM sensors or aftermkts


Bill, actually it was done at the Dealer. So they must have been Mopar one's
I was thinking there is also a small exhaust leak on the right bank.
I do not use the trunk much.
I will get codes next week
Thanks Bob


Not uncommon for dealers to use aftermkt parts.
So dont count on they did use OE


Ps. Exhaust leak will cause o2 sensor issues


Bill, I have found out that most if not all 5.7 hemi engines have this problem with the exhaust manifolds warping and breaking the bolts. Well after looking that is exactly what's wrong with mine.Rich spark plugs on the left side and lean spark pugs on the right side where it is leaking. I am going to get new Mopar gaskets, dorman bolt kit and have the original manifolds resurfaced to correct that problem. I think this will fix all of my issues.
Thanks Bob

Mom & Dad let me buy a brand new 70 Challenger R/T 440 Six-Pack Super Trac Pack when I was 17

(Robert what is a 440 Six-Pack)