2002 4.0, Keep getting codes 302,304,306....a little help... Please...

Okay, I've replaced the coil pack x2, crank sensor, put new plugs and it was fine until I hit 3100 RPMs at 74 mph (between 70-75) for about 25 miles and that it happen again. My jeep started acting like putting your hand over a vacuum hose then taking it off. I had to let off the throttle to stop the lack of power and then re-throttle to regain power. I dropped from 74ish to around 60mph and stayed at that speed until I got off the FWY. In town drove rough, and very low rough idle a stops. Same codes again keep coming up. 302,304,and 306. Any ideas? Thanks in advance.

 

Check the OPDA. That's the distributor for these TJs. You have replaced the plugs and the ignition rail so the oil pump drive assembly (camshaft position synchronizer) is all I know of that's left. Crowns are the best replacement. I got mine through Quadratec. Cleared it up. I was throwing 340, 344 and 301s. Camshaft position sensor intermittent failure and mis-fire on cyl 1. Hope this helps.