I've been getting 12+ degrees of KR on/off for a couple months now, and now my cars starting to have an intermediate miss, sometimes when its missing it backfires out the exhaust, and sometimes out the intake. It's starting to miss when it doesn't get any KR too now... What stumps me is EVERYTHING in the ignition is less than 6 months old, the opti, wires, coil, plugs, ect... Also, when im at idle, my long term fuel trims are really split, the left is at ~129, and the right is at ~155+. And at cruising, one is at ~127, and the other is at ~145+. This just started happening recently, so could my 02's be bad? I put copper RTV on the collector gaskets, but didn't bother to pull the 02's out when I let it dry because it said it was 02 sensor safe on the bottle...

 

Did you make sure your cam dowel pin was the right length when you installed the new cam?

 

The dowl pin was fine. I don't get it, it ran like a champ today though. I don't understand why the blms are split by 10+ or more though...