I just installed my Works downpipe back exhaust (HFC-IP-ABM) last night and drove for 60 miles fine and then I got the ess. Ok I got the code checked at autozone and its the o2(not enough flow or something) the only thing I did was drive to college (60mi)-got gas at bp (it had vpower) and got a car wash got the ESS -drove back to my house.
some factors:
I reused the downpipe-cat gasket the rest are new.
I did not reset the battery.

What sould I do I got the car jacked up and now waiting for it too cool down.

I was thinking of checking the o2 to see if its on good enough
Checking the gaskets
Checking the bolts
then maby unpluging the battery and pluging back in.

Any sugestions?

 

I got it to go off by reseting the battery, clamps, looking at the 02 but I do notice some lil popping not very load but i can hear ir under the car.