k heres the scenario,someone has had a wrx with aftermarket performance parts which includes the ecu flash to work with the parts to get the most out of it. what if they put back the STOCK parts and not REflashing it back? what type of problems could that bring about. couldnt that disperse a unwelcoming smell?

 

huh? depends what mods were on the car

turbo and injectors vs just exhaust

 

tons of problems could arise, talk to the cat who had it before you and find out what he had on there!

 

depends on the parts removed
what if they were running c16 race gas on 20lbs full timing?
took out the parts on you started to run 91?