Impreza 1994 wrx emissions

[Ricky belton]

Hi can anyone help me I have a 1994 wrx that had been decatted I have since fitted a 200cpi sports cat and its still failing the emissions for the mot any help would be grateful my car is a wrx 1994 gc8 jdm import thanks 

[savage bulldogs]

Do you know if it was mapped with the previous decat fitted and has it got any other breathing mods (cone filter ,fmic ect ) ? 

Sports cats do sometimes need a bit of heat in them to pass , if it was mot'd when cold ? You could try getting them to re test it when it's hot. 

Failing that you could try a ECU reset and see if that helps reduce the emissions.  There's a sticky how 2 self read and reset classic ecus in the tech section 

 

[Ricky belton]

Yes it has an apexi cone filter and I believe it has been remapped with a z4 ecu. is it easy to reset the ecu?