Ls/vtec motor..old problem: cold start idle problem..feels like its dieing..but when its hot its idle and runs great..We did clean the iacv and clean the throttle body..driedIt up and put it back all together..And the old problem is solved..Now the new problem..its stuck at 2000 rpm...Cold or hot..Check for leak.. : did the leak test hook up the leak guage and its spot on ( no leaks )..Took out the iacv again and plug the iacv hole in the throttle body ( knowing its goin to lower down the rpms)But no it still in 2000 rpms..put tge iacv back and we took out the intake and cover the throttle body run it and it feels like its goin to die..so theres no vac leak..Throttle cable is all good..everything is set and still no dice..All connector and plug in all the stuff are where it suppose to be...I really need some help...thanks guys...Any ideas will help..

 

Cam Timing?