I'm new here but im hoping that some body can help me! i've recently purchased a 1996 s10 blazer and its miss firing on cylinders 2&4 i had it at the mechanic and he said that i have twobad injectors. but i was talking to my one friend who has a s10 blazer and he said that its the plugs and fuel pressure regulator, ao now im lost is it the spider injectors or fuel pressure regulator? because as of right now it wont pass emisions. PLEASE HELP ME, now for granted i only spent $850.00 on the truck i just need to figure this out before i have to sink alot of money into it.