I own a 2008 4.0L mustang with an x pipe cold air intake the other day I ya know floored it to jump on the freeway and it made a weird hesitated jump, then start launching really hard on the free way from a maybe 40roll launching harder than it ever has then it just stopped launching hard altogether no matter the speed if somebody could help me that would be great! It still has a decent pull but not as powerful as it used to be I also had put cheap fuel at a sketchy station right after the premium

 

Has your car had the fuel pump tsb done. There was one for when you are on the highway for some time and stop for a pit stop. After the pit stop you would have the hesitation getting back on the highway

 

I don’t think it has I bought the car used less than a year ago so I have no idea how much would something like that cost?

 

I think it is free. Call you local ford dealership and give them your vin. They will be able to tell you about any open tsb or whatever

 

Unlike a safety recall, I don't think a TSB repair is free if performed outside of the warranty period.

 

Correct, post-factory warranty TSB repairs will not be freebies.

 

Good point.