03 roush idle problems
I just bought an 03 roush with 91k miles on it, very nice car. The only problem I've had so far is an idle issue. It usually idles around 800 rpm but lately it's been dropping enough to make it stall. It's also throwing 3 codes (p0420, p1150, and p0174) not sure if the codes are because of the exhaust (no cats or oxygen sensors)...help would be greatly appreciated..
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