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Why would a cold idle speed be 1500rpm when it's hot outside?

(2000 Toyota 4Runner)
in Brunswick, GA on September 25, 2013
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.
Displaying 1 answers & 2 comments
Popular Answer
of Greg's Orange Auto on September 26, 2013
what are your eng codes?
on September 26, 2013
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.
of Greg's Orange Auto on September 26, 2013
reurn and ask if they could have left something unplugged or connected wrong
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