Engine Drivetrain 1st Gen Cooper S 05 MCS fuel cutting out???

It always seems to be 1 thing after another! I noticed about a week ago that my MINI sounded a little weird when I was accelerating, but now it's getting bad! It sounds like the fuel is cutting out or something. I have a few basic mods(15% pulley, CAI, plugs, wires, coil pack) and now I have another issue here. I replaced the pulley belt recently, and it sounded much better (the old one was starting to slip). But now it is making a different sound. It sounds like it's basically not getting any fuel or something. I hope this isn't a symptom of the S/C going bad . Anyways, I've tried to video tape it but you can't really hear it. I only have 1 video of it that you can kinda hear it, and it's only 1 "sputter". Sometimes it's not really noticeable and then you have some that are really noticeable, like the one in the video. It's about 8 seconds in, I was WOT and about 4500rpm's when you can hear it. It just sounds like it cuts out for a second. I have 117k miles and I put the new upgraded parts in at about ~95k miles. There also are no codes being thrown, even if I floor it to 130mph from 80mph, with it doing it the whole time.

***I added an annotation that pops up briefly right when the sound is noticable (or lack of sound I should say)***

[ame=http://www.youtube.com/watch?v=EbqXBqMzMt0]YouTube - 2005 MINI Cooper S fuel cutting out[/ame]

I seriously doubt it's the belt, I had recently changed it since my old one was starting to squeak on cold starts. It sounded much smoother after that. I did notice this happened 1 time before right before I changed the belt too. Didn't think to much of it since it only made the sound once. Thought it was from the belt and I was on my way to replace it when it happened, then it went away for a few weeks and now it's back and becoming worse/more noticeable. It's not even like it's sputtering or anything, as I haven't noticed my MINI bucking. It's more or less the sound of the S/C that I notice. I know it's very hard to tell in the video. There's a lot of distortion in there but you can hear it cut out. I assume it has something to do with the fuel. Maybe the injectors? I am going to be getting a new fuel filter probably next week, hoping that'll fix it. I'll be cleaning out the air filter this weekend when I install my new suspension.

Anyways, any ideas out there? Anyone else have similar symptoms? I just hope it's not the S/C going........

 

That what I was thinking too Nathan. I'm definitely going to change it out even if something else is the problem. I saw a write up on how to do it and I saw the picture of the old filter, new filter, and an old oil filter for comparison. The fuel filter was just as dark as the oil filter! Lifetime part my @ss!!! :incazzato:

 

Well, I'll be ordering a new filter from you sometime this week Way. I don't think this is the root of the problem anymore. I'm thinking it might have something to do with the BPV. I've noticed it's getting worse/more noticeable now. I notice it the most when shifting from 1st to 2nd gear. I don't even have to give it full throttle and you can hear the S/C bog down and then bog a few more times as I'm accelerating. I'm thinking the BPV isn't closing all the way or opening and closing itself. I want to try rerouting the vacuum line from the BPV to after the S/C instead of before. I've seen a write up on how to do it. Seems pretty easy. I checked the pulleys this weekend and didn't notice anything loose or anything in bad shape. I took some more videos. The first one is when I shift from 1st to 2nd gear. The second video is when I'm cruising on the highway in 6th gear and give it gas. Sometimes is bogs down, sometimes it doesn't. You can clearly hear the "bogging" I'm talking about. And now it's being felt in the power of my MINI. I don't hear any other sounds or noises when this happens. The only thing you do hear is the S/C bogging down for a second. It seems very random, and not in any way some sort of pattern to it.

[ame="http://www.youtube.com/watch?v=C8UWvHC7trI"]Video 1[/ame]

[ame="http://www.youtube.com/watch?v=_fdxhY0rlR8"]Video 2[/ame]

 

How would I go about checking the BPV? Just pull it out and see how well it's working?

 

I took a closer look at the tensioner pulley today, and had someone rev it up a little while I was looking at it, sure enough, it was moving a lot. Guess I need to pick another one up.......