I swapped a ob1 gsr in a 97 ek. All has been well up until yesterday. I was cleaning some stuff up under the hood nothing major. My freind came over to check it out and i cracked in up and started revving it using he throttle cable. I noticed when i quickly revved the car it would buck and pop really bad (my guess misfire?) So we took it down the road. If i tried to floor it it would just start popping real bad and not go anywhere, but if i eased into the gas it would carry through out the rpm range with no problems. Also the day before my car ran awesome. I have itr cams and a skunk 2 mani so VTECH is very noticable, but not anymore. I replaced spark plugs and cap and rotor. I think it may be the dizzy (I sure hope not). I took it all apart checked it out everything looked to be ok. ecu is p05 chipped on a itr base map (board looked good, not burned up). Any other sensor that could cause this? It also started today running even worse. check engine light would come on after a few minutes of driving. When i come to complete stop it would idle loop as in it would go up and down from 300-1000. But my popping problem would go away which was very odd? If any of you have any ideas of what i should check that would be great. Im new to this forum so please due take it easy on me. Thank you!