guys i need help..my Z has been givin me hell... it started with a code 34..so my car(a 1996 NA) was kinna hesitatin...then whan i ran the ECU diagnostic..the code went away n never came back... then i cleaned ma air intake the throttle bodies n ma injectors... the problem is my car runs like a champ on 1st-4th gear...n if i kick it on 4th gear with high RPM's i can hit 80mph or somethin close...once i shift to 5th gear..the car starts to slow down slowly..then settles on around 65mph at 3000rpm..n the more gas i push the more held back it feels... i dunno what to do..i'm really confused..any help would be appreciated... Thanks guys