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Hi,I have a honda civic 00 LX with a D16y motor and A/T transmission, the motor had a overheat and damaged the entire motor and I bought JDM D15B motor,and runs well the only problem is that the idle is at 1500 rpm and I did check everything possible problems like IAC valve ,vacuum hoses ,Intake gasket ,throttle body gasket and the timing and everything fine but still with the problem , do I need swap the throttle body also the only different is that the JDM D15B throttle body has a hose tube at the back .