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2000 Toyota 4Runner Question: Why would a cold idle speed be 1500rpm when it's hot outside?

 

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warm grey, 3.4L V6, Brunswick, GA, September 25, 2013, 20:07
 Rookie

It's a 90 degrees out every day. The light came on and the code read- rich mixture problem. There isn't any gas smell from the air filter. I bought a new gas cap. May have to get new o2 sensors. The intake housing coupling (the accordion one)cracked and was repaired with black silicone.

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    Greg's Orange Auto (13671 Answers) , Orange, CA - (714) 361-9386
    globalhelper September 26, 2013, 06:15
     Master

    what are your eng codes?

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    warm grey, September 26, 2013, 08:15
     Rookie

    P0172
    air/fuel mix system rich (bank 1)
    probable cause:
    1.injector or fuel pressure regulator leakage
    2.faulty MAF/VAF sensor
    3.ECT faulty
    4.Faulty H02S/AF sensor
    I just had valve cover gaskets and ignition coils installed. Thank You for your help.

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    globalhelper, September 26, 2013, 10:39
     Master

    reurn and ask if they could have left something unplugged or connected wrong

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