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Posted on Mar 31, 2009
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Intermittent rough idle on 2002 toyota highlander

I have a 2002 highlander with 17200 miles in mint condition.The SUV idles rough while stopped but not all the time.Sometimes it feels like a miss and than it will be ok.I have had it to Toyota and they cleaned the idle air valve which improved it but it's progressively getting worse again.Do you think the idle valve needs to be replaced? I'm going to take it back in but would like advice before I do.Jim

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  • rokkit May 15, 2009

    My mechanic cleaned out my whole throttle body and I still have this misterious rough idle problem on my 03 with 112K miles. He thinks it may be the motor mounts though they are not leaking. I just noticed that when I turn the wheel just until there is resistance at idle in gearthe rough idle goes away. What next?

  • Anonymous Mar 28, 2014

    very poor mileage how can I improve

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  • Posted on Apr 17, 2009
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Before you do this I would get some wooden qtips - the long ones auto detailers use. take off the air filtrer assembly and spray carb cleaner into the air\fuel intake and use the qtip to wipe out the inside of the intake. I had the same problem with my highlander a year ago and this fixed the problem.

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