when u turn ur car on. does it idle at high rpm, and sputter back and forth between rpms?.i think the problem is all the ecomnomy factors. our engine has no black peice behind the right side of the intake manifold. and stock USDM does. also. if u have the vx wiring harness there is an extra plug handing by the dizzy. and check your o2 connections.
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USAF