help .....lol

new plugs new coil packs all new cam position sensors. new brain..... still blinking cel at 2800 acts like it's choking. replaced #4 injector.....

Pull the plugs and do a compression test. Look at the plug from #4. Look at the plug from #3 because they fire together at the same time. It might be possible there's a bad connection on the #2 coil ground causing a low voltage spark. The plug connector where it connects to the harness has 4 pins. One is power and the other 3 are ground connections to the PCM. It's unusual but sometimes the sockets can push out the back of the connector and not make a good contact with the pins. If you hadn't already changed the coil pack, I would have suggested it was shorted internally.

The coil pack system uses 3 coils to fire 2 plugs at the same time, one on compression and one on exhaust. Power is constantly applied to the 3 coils and are grounded thru the PCM drivers. The PCM UNgrounds one to make it fire. #1 and #6 fire together, #5 and #2, #3 and #4.