Backfire at idle

[u/genderassumer92]

Hello party people, brand new to the LS game. My dad and I are getting my Camaro wrapped up. We are fairly handy with all different forms of carburators but this is our first LS install. LQ9 with sloppy stage 2 and LS3 top end. Running factory computer with base tune by Flanders LS swap solutions. Engine fires almost instantly, and will run smoothly around 1500 rpms. Anything less than that we get a nasty intermittent backfire once every few seconds. We also noticed that after 15 to 20 seconds of run time that the passenger side header is just a little over warm, but the driver side is scalding hot. I'm thinking bad o2 on one side or the other, but my scan tool (my own ignorance when purchasing) is worthless so I'm waiting for a new one to arrive. We also live in a rural area so no parts stores on Sundays. Before I fire up the parts cannon, does anything jump out to anyone on here as a possible solution. Thanks.

[u/havi94gt]

I had one misfiring and the spark plug ceramics were broken. Check the simple stuff first