Hi guys so I have a 89 crx dx with a sohc zc mpfi. SO I noticed that after I drive my car for like an hour or so it feels like it loss throttle response. It takes longer for it to accelerate after driving it for a bit. no codes Could it be my tb getting stuck or something? Car has a brand new dizzy, msd ign, dc sport headers, zigen exhaust, chiped pm6 ecu. This might help you guys any help appreciated.

 

Look into your TPS. Either its bad or its off calibration. Its a start

 

because it only does this after driving it for a while in the morning after it warms up it runs like a champ and pulls hard just after driving it for it bit it goes to crap

 

Im having the same issue with my LS, I recently changed ignitor, coil, spark plug, and wires, 02 and FitV. I still get code 1 which is Oxygen, but still cant figure it out. maybe your ecu will shoot a code soon.

 

Your oxygen sensor is probably going out. After your engine is warm and goes into closed loop, it is attempting to make long term fuel adjustments. Problem is occuring because it is getting incorrect input from the O2 and making fuel adjustments in error...