Car is an 03 mach 1... first im running the factory catback but dumped before the axle because a catback i bought didnt fit right before i went to mw so i had to throw the factory mufflers back on and the car is now hesitating at wot and second the check fuel cap light is on and ever since it's been on the smell of gas has increased but the car is running a little better. Just wondering if it's bad to be driving it with those issues and how can I fix them?
Yeah, your IAC valve is completely different than my Bullitt.
It is probably a vacuum line for the HVAC controls. Maybe, ab mach will chime in... He will likely know for sure since he has a Mach.
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