Epic motor counter -explosions 2.5L

Good afternoon, a few days ago I replaced a 3/4 engine of an epic 2.5 lts six cylinders and when the engine turns on it makes some counter -exploration and therefore fails in the idle, I would like I have put the Scaner several times and do not throw me any code, I would like to know if someone has presented that fault and if they have solved it, thank you I wait for the answer

Could you be more specific in what was replacing? All against explosion indicates a synchronization failure of the ignition that does not detect the Scaner, you can also have valvular time problems.

I have already reviewed the chain synchronization and everything is fine the valves are in perfect condition, and with 3/4 engine I mean block, crankshaft, pistons, oil pump rings, water pump, we no longer know what to do here in the workshop

Have you already done the compression test? They should be no more than 10 psi of difference between each cylinder, if there is more of that, it will cause you a march to the minimum uneven.

I'm going to do it !! I am putting together the butt check and there were some broken emptiness hoses, in addition the EGR valve is a little locked any result I will post it