Q: Engine not reving past 2500 rpm

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I recently got gas from a gas station and on my way home my check engine light came on my car jerked and when I get to about 2500 rpm it starts jerking and will not accelerate. Then I turn my car off and it's fine. It's like when it get hot this happens then it's fine when it cools. The temperature gage stays just under half way like always. It's weird it happened as soon as I get gas. Didn't know if it was bad gas. Just weird that sometimes it happens sometimes it doesn't.

My car has 82000 miles.
My car has an automatic transmission.

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