okay, i had ls/vtec in my 88 hatch, rings started going out so i put a b18b in there. swapped it all out in two days and it started right up but ran shitty, wouldn't rev up that good and was throwing intake air temp code and coolant temp code and idle air code because i had plugs backwards. Next morning i added more gas cause it was low and since then it wont start at all.

I have spark in all cylinders, I have fuel from every injector, it just cranks over but won't even attempt to start. What should i check first, i've tried another ecu now and everything.

Any Input is appreciated!