Just Did a cam swap.. Ran into every problem I can think of..

Now.. My car rips *** untill It warms up.. But Im thinking it has something to do with open loop


When I first Start it and and take off everything is perfect..

3 miles I can start to hear almost a tiny missfire... Then It gets worse and worse then looses power and backfires start to happen...

If I shut the car off for a minute or 2 its good for another 3 or 4 miles?

 

So its not when its hot. Its just after a few miles?

 

Maybe your O2s are not providing good input to the PCM. You could look at it with a scanner to help determine any obvious fault.