why does my car idle rough in the morning for about 25sec on 2001 Toyota Solara

it all started when my check engine light came on. i took it to toyota and they told me its the air fuel ratio sensor. before replacing the sensor, i tried taking one of the battery leads of to reset the code. but after i put the battery lead back on. the car started idling rough like it was going to stall. other than that the car runs perfectly. i changed all the spark plugs,oil change, new air fuel ratio sensor, throttle body clean up snd engine coolant flush

by in Freeport, NY on July 03, 2009
2 answers
ANSWER by on July 03, 2009
A very common thing on Toyota is that the Idle Air Control motor wears out. It will cause a rough idle, especially in the morning. Sometimes you can clean them but often they have to be replaced. Who did the Air/Fuel ratio sensor? It is absolutely critical to get just the right one. Toyota has factory updated this part so an after market one is risky.
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ANSWER by on May 04, 2011
Check your egr valve