need help engine problem 2004 crv

[Hi tech]

Hi everyone

 

 

So my problem is a random misfire. The timing chain and head were replaced at 140,000 miles it now has 141,000 on it and i have replaced the map and iac because those codes popped up after changing the timing chain and head. After changing the iac now i am getting a random misfire code on 1 and 2 cylinders and some times 3 or 4 and the coolant temp is well above 240 degrees. my question is what is wrong and how do i fix it. Mind you I have changed the coils out on it too. It has the 2.4l dhc engine.

[HONDA CRX 88 SI]

Well if your problem started with the timing chain been replace I would check for proper base timing and check the head gasket could of been compromised

[Hondak20a2]

So you weren’t getting those codes before the timing chain install ?