1st Gen R53 Cooper S Most liked posts in thread: Trifecta & Hesitation

  1. BlimeyCabrio

    BlimeyCabrio Oscar Goldman of MINIs
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    #2 BlimeyCabrio, Jul 7, 2015
    For the wheel speed sensors, I usually just pull them out and wipe them off. I've never had to actually replace one... cleaning has always resolved the trifecta for me. I spray a little brake cleaner on a towel and wipe the outside of the sensor barrel with that. AND I spray some into the mounting hole for the sensor while it's out and clean it out good with the tip of the towel, and let dry before re-installing. I also unplug the sensor where it connects to the harness, spray both sides with electrical parts cleaner, let dry, and use a little dielectric grease on the o-ring seal when reassembling. Has served me well for 9 years with only the occasional trifecta.

    For your hesitation... Hard to say, that could be a lot of things. Tune, fueling, map sensor...
     
  2. mrntd

    mrntd Well-Known Member
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    #4 mrntd, Jul 8, 2015
    On the first gen cars the tire pressure is figured by the ABS sensors. It's a magnetic read sensor so clean it with anything to cut the dirt but not hurt the plastic. Simple Green works well. I'd clean all the sensors.
     
  3. Boxman

    Boxman New Member

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    #3 Boxman, Jul 8, 2015
    Yeah, I'm pulling the wheel on Friday/Saturday to clean it a bit. I figured as much. My uncle/grandfather both swore up and down you CANNOT clean an ABS sensor but I beg to differ. :wink:

    As for the hesitation, I'm going to go down a list and check things off. Either way, I drove her pretty hard yesterday close to the redline in 4 gears, no hesitation. Dunno what the deal is. :idea: