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2002 Lexus RX300 Question: Car running rough/ brakes not working properly. Check engine and VSC lights on.

 

Question

tonilee, 3.0L V6, Champlain, NY, January 20, 2014, 18:31
 Rookie

codes reveal misfires on 3,4,and 5. In addition, periodically, the brakes do not stop the car. They slow it down, but after one depression the pedal becomes extremely hard, like pushing on a rock, and does nothing to help stop the car. Can these issues be related? (It has been extremely cold outside.)

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  • Answer #1

    pushrod January 20, 2014, 19:29
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     Master

    There is a vacuum circuit problem for the brake booster. It is possible misfire is related. The vehicle needs to be checked out by a mechanic hands-on!

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  • Answer #2

    Greg's Orange Auto (13428 Answers) , Orange, CA - (714) 361-9386
    globalhelper January 21, 2014, 06:14
     Master

    with misfires there is not enough vac to work brakes properly,seek diag and est

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    tonilee, January 24, 2014, 05:44
     Rookie

    Update: Had the timing fixed and now the brakes work just fine. Weird.

    Thank you for your help!

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    pushrod, January 24, 2014, 06:02
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     Master

    Incorrect timing can drastically effect vacum!! Glad it's fixed!

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