i've got a Impreza uk turbo and put on a prodrive ecu a month ago, its got a scooby sport exhaust and k and n panel filter. I just wanted to to know, its sometimes back fires abit when taking my foot off the pedal and the exhaust is getting a tiny bit black around it. Is this running abit rich now, and will it be ok, im using shell v power fuel on it as.

Any ideas?

Thanks
Dan

 

What happened with this mate? Fingers crossed you're still on the same email address