IS IT THE IDLER BEARING OR THE A/C HARNESS?????

[speedtribe11]

wassup guys?!! i just wanted to hear your opinion about this.. my ride is a 1993 civic sedan with a B16A EF engine (JDM). i had the front end replaced a few days ago.. after the work is done, when i started the engine, it shud be in 1,500 rpm because it is still cold. but now it stays in 800rpm. why is that?! is it because that the airconditioning harness is not yet returned to nornal or the idler bearing is kinda old and needs to be replaced? or maybe the belts of the alternator and power steering benlts are dirty? plus now the vtec pops at 5,000 rpm!!!! its should pop around 4,500rpm right?! i need to hear your opinion on this.. THANKS AND MORE POWER!