i have a 91 civic hatch with a ls swap in it... after driving around a while it will loose power and the more i give it gas the slower its goes till it stops and then will die and ill have to wait 5 to 10 mins b4 it will start back up. (not travling fast always does it while just crusin 30 ish mph) what do u think it is?

 

welcome to the forum. check to see if the ecu is the correct one for the swap. the before swap ecu may still be in there, it usually will not work with a swap. also check your ignitor/coil for condition, and fuel flow path ( fuel pressure good at the rail),

 

well i checked the copmuter its not a p75 but it will run the motor. and throws 8 for the code witch it the top dead center sensor(distributer) so i rebuilt that. so it no longer dies but it acts like it has it has no power when im just crusin at like 30 it will spit and sputer but if im in the gas it runs fine and is quick... it has a exhaust leak so i think that might be throwin my o2 off or something to cause it to spit and sputer cuz i replaced the plugs so i know its not that... ill need to check my fuel pressure havent done that yet