Iv been having an issue with my 96 wrx shuddering at full boost, i havnt had the check engine light come on but thought id check the ecu for codes. When i went to connect the black plugs they were already connected which means they have been for the past year Ive owned the car? and Ive never seen the check light? so i tried resetting the ecu by connecting the green plugs but still no luck?
would i be right in thinking someone connected the black plugs causing the check light to come on and they have removed the bulb or something?
Cheers