I also replaced the 8 valve D15b8 with a 16-valve D15b2 out of a '88 Civic DX model. I just completely rebuilt the B2 engine and dropped it in using all other parts from the B8 8-valve engine, including intake and exhaust manifolds. It idles smoothly... but on accelleration, bogs down until the rpms climb then it really takes off. I did punch a hole in the CAT... oops... I plan to replace the stock exh. manifold with headers later. I have already checked the valve clearances and the timing-(looks correct) and they are correct. Any suggestions??? It is really starting to pi** me off... have to plan ahead before I pull out in front of someone...
I am also wondering if I have to replace/reprogram the ECU to work with this engine or should it work fine????
thanks,
Jason
1993 Civic CX w/D15B2 16-valve Engine