This may be a stupid question but I'm going to ask it anyways. I bought my first 1991 Honda CRX HR car today. It's my first 4 cylinder engine. I've always been a V8 person chevy muscle so I don't know a lot about these cars although I have researched and researched them as much as I could.

Since I got this car it has been having stalling issues at 4500 rpms if I push the throttle to the floor when it hits 4500 rpms it just bogs out bad like the rev limiter is stopping it or something. It's been kicking my *** not being able to really get on the car hard before shifting. I know that is not normal 4500 rpm's for a 4 cylinder is just getting started. So I started checking things well I ran the model number of the ecu in the car and it's...

37820 PM6 L09
1.6L Civic Si

Which obviously is not the correct ECU for this car. From what I have seen and read on the net and ebay the correct ECU for this car is...

37820-PM8-A02
88-91 1.5L CRX HF

Would this be the reason why my engine is not performing like it suppose to be performing? The engine has a cold air intake and headers. Other then that I have not seen any other modifications although injectors and other things are possible. I really do not know for sure. All I know is 4500 rpm and it stops performing altogether. Just bogs out and if I keep the throttle down it tries to bog out till I dies. I would imagine that ECU could be the issue but then again swapping ECU's may be something you can do with Honda. I want some insight on this from anyone willing to help out. I appreciate you reading this and any info is greatly appreciated. I have already found the right ECU on ebay for $50 I just don't want to go purchasing an ECU if that is not the exact problem here. $50 is a lot of money for me right now but I need my car performing like it was meant to perform. This bogging out is driving me stupid. Thanks for your time.