So I got a new to me 93 suburban and guy did some work on it. Can tell lots are new. Had an issue seemed like timing issue but I took the fan off took off the two pieces between the air filter and throttle body and boom no more whining idling decent doesn't fall on it's face when u give it gas so what's my issue? One collar has a hose running to the valve cover breather one collar has an area to hook up a hose but no hose attached. Ik one injector has a piece broken and when first started sounds like there's a huge vacuum leak but I think it might be the injector noise any info will be greatly appreciated