Spark plug fouling

[twobjshelbys]

Originally Posted by 169mph

It's a Borla 8 stack with a FAST XFI Sportsman ECU. I was told that FAST no longer sells my ECU and there's very few people who can tune them or at least not willing to tune them. I believe Roush tune the engine. If so, they should have a copy of the tune or I'm I being too optimistic??

Thanks, Mike

I don't know how Roush does this any more but when I was having the problem with mine Roush was fairly cooperative. But often that is more related to the individuals involved than corporate policy and my contact was with a direct engineer.

That said, your tune is most likely intact. You can try to get it from Roush but I doubt it will be different than what you have currently since you have no evidence that it was subsequently tuned by someone else (do you?)

However, I don't know how much self-learning this system does. It's possible its learned itself into a corner that it can't get itself out from. If you can get the FAST software maybe you can simply reset the adaptives and let it start over again.

I still assert there is something besides the ECU that is causing this problem. Something is leading the fuel system to over-fuel since I sincerely doubt Roush would ship an engine that behaves so badly by design. You need to find that first.