3 cars same problem, knock sensor and o2 sensor codes.

1. 99 gsr in a eg hatch
s300 ecu stock ecu is p28

2. 99 itr in eg hatch
s300 ecu stock ecu is jdm itr

3. 01 h22 in eg hatch stock ecu is p13 ( jdm obd1 ecu)
s300

okay they all lag with the s300 but they will pull harder with the stock ecu

only engine lights are knock sensor and o2 sensor..... disabled knock with s300 and they drove worse. bucking and lagging...

also replaced knock sensor on the h22 and the light is still there..

rywire did the engine harness for the h22 but still have knock sensor code.

 

ttt

 

?

 

you'll need a shop that know's what they're doing or type in a better description of the problem, symptoms and what you've tried.

example:

1. 99 GSR in EG hatch.

what ecu on it? p28?
p28 with knock code? can't happen.
o2 sensor code? check your pinout or splicing or replace o2 sensor.

follow this pattern or just describe your problem better and other members may try to help.