hello org people .. hey im having a rpm problem with my 96 cav z24 ... i recently did an overhaul to my car and i change pistons to forged lower comp pistons and eagle rods because im plaining on going turbo. now i dont know if that change or because i lower comp now im having problems with my rpms .. normally these cars run like 1000 rpm at start .. well some times mine drops upto lik 800 and sends A fault signal to the ecu .. and i dont know what it is .. i already checked IAC sensor i think thats the name and cleaned the throttle body and worked for a while ... checked and cleaned crank sensor and nothing... checked the oxygen sensor that goes also with the throttle body and nothing ...

could someone please help me with this ... i dont know what else to do .. thanks

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and sends A fault signal to the ecu ..

So your CEL is on? Get the code read and post back.

apologize if i wasnt clear enough .. what i was trying to say is that when i scan the crank sensor it doesnt sent a constant signal to the eco.. it fails sometimes and i changed that sensor already ,, do you think it might be the entire wiring that goes from that sensor to the ecu ? ... is this thing causing the problem ?? that im having problems with my rpms

thanks

It wouldnt hurt to check it.