Nothing hisses, but i might not be able to hear it. when it runs, it is so loud that i have the feeling that it is a diesel. i will check the firing order tomorrow. the o rings were like brand new. i did not changed the fuel pressure regulator. do you think that will isolate the front and rear banks and cause my problem? because i think that's exactly what is happening - it is running on only the front cylinders. will do a compression test. about the cats - it is smoking from the exhaust tip. how do i chack if thet's the problem? can i just disconect the Y pipe? i know it's gonna be loud but...
i will also check everything as advised by Keyser... but if i swap the injectors as Keyser sayes, could i use the same UIM gascet since it is brand new?...