car has 40000 miles on it. i ran a t1r test pipe for about 3000 miles, the test pipe has been off for 1000 miles and now i am getting a 0172(too rich) anyone have any suggestion of what it could be thanks

 

Is the car back to stock? What mods where un-done?

 

toda header, t1r test pipe, apexi single cat back . car is back to stock now . had to put a new head on about 5000 miles ago.

 

Do you have any Freeze data from when the code was stored?

 

sure don't

 

Have you reset the light? Does it come back on? Can you get the freeze data if it recodes?

 

ok will do tomorrow. what info will it freeze. thanks for all you help

 

All the PCM data when the code sets

 

Looking at a Honda S2000 Manual, the possibilities are:
fuel pressure regulator, fuel return pipe, fuel pump, fuel filter, primary HO2S, incorect valve lash, injectors, evap canister and purge valve. It all depends on fuel pressure. If any questions on diagnostics, feel free to pm me.

 

He's allready Pm'd me with the reset DTC's. He's got 2 bad 02 sensors.