Hello out there
Recently I decided to do up grades to my 2008 ram 5.7 hemi, new cold air intake new pipes mufflers x pipe cutting out cats welding inserts into the pipe to hook up my O2s 4 of them check engine light stayed on but truck ram fine went a head and drove the truck for 6 weeks got annoyed with how loud the truck was and decided to put cats back on that's where my problems started ,so I paid to have the cats cut back in 600 sounded just fine codes cleared out driving home truck runs like crap like something is wrong with. The o2s so I take it back scan the truck bank one running lean check the dodge forum could be the after market 02s so I buy 4 from mopar 400 still same PCM code bank one running lean if I clear the codes truck runs like a top for about 5 miles then right back to same code any suggestions

 

Welcome to the site.

First, check your welds and make sure they are not cracked and do not leak fresh air into the exhaust.

Second, go to the DIY/How To section and find the thread on how to use non foulers to trick to O2s

Third, before attempting anything else, ask us first. We can help you save so you can spend it elsewhere