I have a 1990 Honda CRX si with a b16a2 engine transplant. It has an Si-R-II ECU, Place Racing external VTEC controller, and an APEXi S-AFC. My problem is that every once and a while, (not every time, but quite often) when I give the car full throttle, between 4000 and 5000 rpms, in either 3rd or 4th gear, the car just "falls on its face." I get no throttle response. Pressing the gas pedal gives no effect. Shifting to another gear does nothing either. I then have to turn the car off, and then back on again to regain throttle response. Could you PLEASE tell me if you have any idea as to what this is. I would be very thankful.

 

my friend had this happen it was a bad ecu.

 

that happend to my old Prelude Si, but it got stolen before I could get around to fixing the problem.