bcivic

unless i don't know how to work this forum i don't see any replies 

so i will tell you what i know

on my civic there is a high rpm cam oil pressure sensor mounted on side of head

first if oil level is to low car wont go over 4k rpm

next if engine or in your case ecu changed computer is looking for that oil pressure signal and engine doesn't have that sensor so it wont let it go over 4k

hope that helps

2001 civic a2 engine

I start car from cold run it to hot drive 30min no problem runs like it always had 

shut it off for hour and start it it runs for a couple minuets then goes into a "limp" mode it doesn't have a miss but doesn't have power and wont hardly idle 

i can shut it off and 10 to 15 minutes later it drives fine again 

during that time fuel pressure is same and proper 

i pulled o2 sensor out and it ran same 

I cleaned egr same

changed throttle ass which included 4 sensors idle air throttle position  sensor and 2 more same running

compression all same and good 

swapped all 4 coils from running car same running issues

i changed cam position sensor

i think thats it