Difficult cold start on 2006 Toyota RAV4

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My Rava4 only has 39,000 on it and I'm having problems with a cold start. It used to turn over quickly with 1 crank but now it takes several seconds longer. Once the engine is warm it fires up right away. The other problem I had yesterday, I was making a left turn and it stalled. I was able to get it restarted right away. Putting fuel injector cleaner has not seemed to help. I've been very careful about maintenance every 4,00 miles.
(1) Answer
Were you able to find out anything about these problems? Did you have it looked at? Have you had any check engine light or other warning lights come on?