Ok...i got the engine to crank over

....but it wont start

I've heard things like you cant use the 92-95 Injectors with the PM6 ecu(88-91 CRX Si). Is this true? if so..that might be a reason to why it's not starting either. But at least im half way there by getting it to crank over and i know my battery is fully charged. Is there anything else i should watch out for (ie: things that dont work with the PM6 ECU)?? Thanks for all input.