famdakam

I have a 90 crx with a sohc zc the intake and throttle body look a lot smaller than the one on my d15b7... Would it be better to switch it out?

24TEN

iTrader: (2)

Post a picture. I'd bet you have the one meant for an 8 valve head or possibly the VX manifold. Also you should take a look to see which ECU is currently installed.

famdakam

The one that says pgm-fi is the tiny one... And why should i check the ecu... I also have a flat spot in acceleration from about 2k to about 3k...

24TEN

iTrader: (2)

That flat spot is possibly from the ECU or possibly from that manifold. Hard to say without knowing what's what. Just from the looks of everything, I'd imagine you have a CRX HF and they replaced the long block only. If I'm right then you have an engine with 16 valves as indicated by the valve cover instead of 8, 1.6L instead of 1.5L, and possibly the original ECU. Basically the engine is being choked by the manifold and the fuel maps aren't helping anything either. Not saying it won't run, obviously it does, but not without some trade offs.

famdakam

So just get the right intake... what ecu.. what engines normally came in this crx..

famdakam

So i did a little reading and found that the correct ecu is a p29 or i could use a p06... what will i have to get to finish the swap. Thanks in advance.

famdakam

Honda Acura ECU Codes


found this to which ecus can i use and do i need an adapter for the ecu.. Thanks

famdakam

It has a pm8 by the way

24TEN

iTrader: (2)

Your reading was just a tad bit misleading, a PM6 ECU is what you "should" get along with the matching D16A6 intake manifold & throttle body and preferably the matching exhaust manifold (there are other comparable components that are interchangeable BTW in case you can't find those specific pieces). All of these parts are different compared to what you have. BTW the PM8 ECU is in fact for an HF model CRX.

famdakam

Thanks for the help.