Hello all, I recently bought a 360F1 Spider and my heat exchanger was cracked so I replaced it; I would not say I'm a "new" mechanic/tech by any means, but I'm not an "advanced" tech, and I'm completely new to Fcars, I see why these cars require a "special-tech". Anywho, I took off the intake manifold; while I was at it I changed the gaskets (on the base), and where it meets the flaps. I cleaned out the little excess oil in there. Re-assembled it all, and now my car won't idle. I'm getting popping noises on one bank. (With the slow-down light). The injectors were cleaned (new filter screens) and o-rings at RC engineering. The car did have PM8RB plugs- I changed the plugs while I was at it, to be honest, they looked less than 6k miles old. However now, when the car stumbles to idle around the 30-sec mark. I get the slow downlight I moved the CAT ECU from the left to the right and the right bank then starts popping. I checked the probe sensors in the CAT- they are still good. My Matco Maximus 2.0 does seem to connect to the car for a bunch of features. I get the misfire on the left, well now on the right as I moved the exhaust ECU... Could it be it was always bad in my car (since I barely drove it 10 miles after buying it)?