CVF intercooler with downpipes. And 3 inch Thermal exhaust throwing codes

[Iraqvet77]

After installing a CVF intercooler with downpipes, and the 3 inch thermal exhaust, I'm getting the 3 codes from the scanner. p0300 random multiple misfire detected, p0153 oxygen circuit slow response bank 2 sensor 1 p0133 oxygen sensor circuit slow response bank 1 sensor 1. Everything was great until I added those mods. My vehicle has only 34,000 miles Have any ideas why?

Thanks

 

[UNBROKEN]

It’s time to go back and put your hands on every connection you touched. Something wasn’t put back together, right

 

[SlowSTExploder]

Slow to respond codes tell me you put the defouler Jpipe on the primary o2 sensor, seems to be happing alot more lately where people are installing the defoulers in the wrong spot..

 

[Wohop]

Slow to respond codes tell me you put the defouler Jpipe on the primary o2 sensor, seems to be happing alot more lately where people are installing the defoulers in the wrong spot..

yup sensor 1 is upstream of the cat. Almost certainly put the defaulters on the wrong bung. Needs to be AFTER the cat to make up for the lower filtration of the high flow cat