[b20a5lude]

Please read this and help me if you can!!!

I rebuilt my 1988 prelude engine and am having problems with mixture! It is a B20A5 engine,fuel injection 2.0l. Symptoms:

With no check engine light:

-runs rough
-as soon as it hits 3750 rpm it has a definate iBIG JUMP in horse power!!!!
-smells like it runs rich


After check engine light comes on:

-runs better!!!
-no big jump in hp @ 3750 rpm
-does not smell as rich

Apon rebuild I replaced the o2 sensors with new NGK o2 sensors, new distributor cap and rotor, plugs(platinum), ect...

please help me !!!!!!!!!!!!!! The biggest thing I noticed is the gain of HP when the light is off (weird)????? Could it be the o2 sensors ...egr valve??? pcv valve???? I confused????

Thank you
Steve