There is a code P0457 ( Evaporative emission system leak detected fuel cap loose/ off) and message says check fuel fill inlet After installing the CJ intake. Any suggestions are welcome.
I'm not 100% sure, but I THINK that code did pop up on me a looong time ago. It had nothing to do with the intake manifold ( car was bone stock except for a few exhaust bits). The culprit turned out to be a small portion of melted fuel lines caused by my half assed muffler shop installation of Borla axlebacks (i have no idea how the hell someone couldve screwed up something so easy but that's life)
One of the symptoms was me not being able to fill my gas tank continuously, had to pump it super slow. Check that and see what happens. Other than that, you may have a totally different issue than mine, but that code does seem familiar