OK I GOT A 94 CIVIC EX COUPE IT HAS A JDM D15B VTEC SWAP ON A P28 ECU WITH A 5 SPEED D16Y8 S40 TRANNY THERE ARE NO CELS AT ALL IT RUNS GREAT BUT NO MATTER IF I GENTLY PRESS THE THROTTLE OR GIVE IT FULL THROTTLE AT 4100 RPMS IT FALLS ON ITS FACE IT SEEMS IT I HAVE IT HALF THROTTLE RITE BEFORE 4100 RPMS (LIKE EASING INTO VTEC) VTEC WILL ENGAGE AND IT PULLS HARD BUT HITS REV LIMIT AT 6000 RPMS AND I KNOW IT SHOULD ATLEAST GO TO 7200RPM IF IM IN NEUTRAL AND JUST REV THE CAR IT WILL ONLY REV TO 4000 RPMS AND BOUNCES AT 4000 RPMS PLEASE HELP!!! I INCLUDED PICS OF SWAP AND ENGINE AND TRANNY CODE ALSO A PIC OF THE CAR BUT I KNOW THATS NOT RELEVANT TO MY ISSUE BUT ITS A CLEAN CAR AND I WANT TO FIX IT SO IT WILL LAST ME AWHILE SO PLEASE HELP IM GOIN CRAZY

 

Please turn the caps lock button on your keyboard off.

Is the P28 ECU a proper match for your engine?

Does the CEL work?

Is the ignition timing set to spec?

 

is it stock ecu or chipped? cause it sounds like you have 2 step if its boucing at 4000. if it is it might have a set rev limiter at 6000.

 

Yeah first off I'd check if there was a CEL, and if it was the correct ecu for the car. If they are possibly try another distributor.