Feels sluggish/ Front end "wubb" noise
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Feels sluggish/ Front end "wubb" noise

This is a discussion on Feels sluggish/ Front end "wubb" noise within the Focus RS TroubleShooting forums, part of the Focus RS Garage category; So I've noticed as of the last week or so that the rs is starting to feel like I have to give it more gas ...

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Thread: Feels sluggish/ Front end "wubb" noise

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    RS Member Kirye1337's Avatar
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    Angry Feels sluggish/ Front end "wubb" noise

    So I've noticed as of the last week or so that the rs is starting to feel like I have to give it more gas to even move in normal/sport mode. I have done anything crazy, just daily driving, ordered new spark plugs from Tune + pre gapped. Haven't checked my stock plugs either, I'm running an ots tune 94 stage 1. Also, I'm not sure if it's my axles or wheel bearing but the feel/sound is even between both passenger and driver side, sound is related to wheel rotation and speeds/slows (low tone "wubb" noise, can't really describe it, can only feel it in the cabin while driving.) Any thoughts?, I was wanting to bring it to the dealer but they're a waste of my time and I don't want someone touching my car.
    320icar likes this.

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    total guess on my part but could the rear brakes be hanging up giving you the speed variation plus the odd noise - good luck

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    RS Specialist phillofoc's Avatar
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    What's your OAR? Is there a possibility of you putting in bad gas? Mods other than tune?
    If you buy one, drive it hard. Because thrills like these don’t happen often.

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    RS Member Kirye1337's Avatar
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    Quote Originally Posted by phillofoc View Post
    What's your OAR? Is there a possibility of you putting in bad gas? Mods other than tune?
    OAR is always -1.00, I monitor that always. I've been doing some research and all I can see is pads rubbing or wheel bearing. not too sure.

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    Take it around some turns and see if the noise changes. It will get louder on the outside wheel if that bearing is failing.

    Also try cruising until you hear the noise, then drop in neutral and roll. Does the noise go away or die down with engine RPM?
    2017 NB RS1
    Engine: Radium CC's & Plate, Boomba BPV, Mountune SSC & Filter, SteamSpeed IC & Piping
    Suspension: Mountune springs, Massive Rear Camber/Toe Arms, Whiteline Rear SB & EL, Powerflex Front LCA Bushings, FA 500's (Raised 40mm by FA)
    Brakes: Rotora 2pc Rotors (15lbs), Mountune Street Pads, RBF 600
    Shoes: Volk CE28n 18x9 +38 (16lbs), 4S 265x35r18's
    Body: Xpel front Wrap, Satin black Roof / Mirrors, Boomba SS Lever, SS Arm, solid bushings
    T.B.I.: Shorai Battery, Turbo Blanket

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    Funny, I was thinking the same thing as of last week. I floored it in 2nd, and it just felt wrong. Rpm didn’t skyrocket like a slipping clutch, and there wasn’t any hesitation on throttle. But I wasn’t thrown back into the seat like a tuned bolted on RS usually does. It’s something only I could notice because I drive the car everyday.

    OAR at -1.00, boost holds 24.75psi to redline in 4th. But something just feel......off

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    RS Member Kirye1337's Avatar
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    Quote Originally Posted by 320icar View Post
    Funny, I was thinking the same thing as of last week. I floored it in 2nd, and it just felt wrong. Rpm didn’t skyrocket like a slipping clutch, and there wasn’t any hesitation on throttle. But I wasn’t thrown back into the seat like a tuned bolted on RS usually does. It’s something only I could notice because I drive the car everyday.

    OAR at -1.00, boost holds 24.75psi to redline in 4th. But something just feel......off
    This is exactly how I feel right now, I have no idea what's going on or if I'm just being skeptical.

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    RS Member Kirye1337's Avatar
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    Quote Originally Posted by Biznatch View Post
    Take it around some turns and see if the noise changes. It will get louder on the outside wheel if that bearing is failing.

    Also try cruising until you hear the noise, then drop in neutral and roll. Does the noise go away or die down with engine RPM?
    I'll give that a go, I was thinking of ways to determine wheel bearing but so far everything is hinting away from them. I'll keep it posted with updates.

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    Quote Originally Posted by Kirye1337 View Post
    I'll give that a go, I was thinking of ways to determine wheel bearing but so far everything is hinting away from them. I'll keep it posted with updates.
    Yup, these are just simple diagnostics to try and narrow down where to look. Second one should rule out anything engine related. If it's not either of those it might be the PTU. When I had a front axle go bad on my 06 STI, it was a random clunking noise that you could feel.

    Also, have you tried rotating your tires? It's possible one of the weights fell off and the wub your feeling is vibration from that.
    2017 NB RS1
    Engine: Radium CC's & Plate, Boomba BPV, Mountune SSC & Filter, SteamSpeed IC & Piping
    Suspension: Mountune springs, Massive Rear Camber/Toe Arms, Whiteline Rear SB & EL, Powerflex Front LCA Bushings, FA 500's (Raised 40mm by FA)
    Brakes: Rotora 2pc Rotors (15lbs), Mountune Street Pads, RBF 600
    Shoes: Volk CE28n 18x9 +38 (16lbs), 4S 265x35r18's
    Body: Xpel front Wrap, Satin black Roof / Mirrors, Boomba SS Lever, SS Arm, solid bushings
    T.B.I.: Shorai Battery, Turbo Blanket

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    Has the weather been different in your area lately? hotter? humid?

    I know for my car, whenever its gets over ~73 ambient my rpms dip when I come to a complete stop.
    Last edited by SWEEPTHELEG; 04-10-2019 at 04:54 PM.

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