Hi guys I'm a forum noob but all internet searches have turned up nothing helpful. I have an 01 f4i with 16k miles that usually runs pretty great. Just about to work the other day and the motor started running very sluggish. I thought it was running out of has as it was very low, but I filled the tank with premium and it still runs very poorly, lacks power, and the idle drops off to zero at about 130 degrees while warming up. It's not the idle and it appears as If everything is hooked up. Any ideas would surely help and i really appreciate your help! Comment if you have any questions bout it. Thanks,
Mike.

 

Fuel pressure regulator. You'd have been better served posting this in the F4i forum. And stop putting over 87 octane in it. Why? Use the search feature!