hi.. i just recently put in a obd1 usdm gsr in my del sol vtec the motor was pulled out of my friends integra which ran fine. i put all new parts on. head gasket. intake mani gasket. t-body gasket. everything. anyway. it starts up fine. idles a bit high. but when i go to tap the gas it hesitates and then revs. also if i give it to much gas it wants to die. i checked the timing and it seems to be fine. i wired a secondary sensor for the manifold and i also have a knock sensor. im just not sure what it could be. the exhuast seems to sputter a bit. what could cause that? the car has yet to throw a code which has me confused because everything should be working correctly. im using the obd 1 p72 ecu as well. everything is stock. could the wiring maybe cause this or does it sound like a timing issue. please let me know if anyone has encountered the same problem.

 

double check the tps and map sensor plugs. Also check IAC plug.

 

sounds like a spark problem to me