fuel injector problems?

I have a 1990 crx dx completely stock AT trans. It has a freshly rebuilt head. The problem im having is strange. It idles fine no miss or anything. I tach it up to about 3500 and the engine stutters a little. I drive it around and it has hardly no take off power and when i try to kick in the passing gear it does the complete opposite and boggs down. I am getting 2 codes. Code 1 (oxygen) and code 16 (fuel injector). It seems to be acting like its running off of one injector.The power has also went down alot. I would appreciate any help you guys can give me.

i don't know about the codes but to me it sounds like when you give it the gas it stumbles, which to me means not enough fuel is being delivered.

maybe start off by trying some good fuel system cleaner in the tank, if that doesn't do it, start changing and checking each part, fuel filter, injectors, pump maybe.

Ill give it a try im running out of ideas with this car . Thanks for your help.

well i think i fixed it. The timing was off a little. Thanks for your help