2017 Buick Encore swaying back and forth

[Pattyb10]

Hello, so my Buick Encore is doing this, I stop at a light and It’s rocking back and forth. Engine light went on yesterday also. Any ideas what it could be? One more thing I forgot to post, I stopped to put gas in, my encore didn’t want to start. It kept turning over like wanting to, but no go. So I had to quickly push on the accelerator and it started. Once it started running it was fine. When I got home, I turned it off and started back again and it was fine like normal.

 

[2007LucerneCXL]

Simple answer is to get it scanned for current or stored codes, anything else would be guessing.

 

[Again]

Purge valve stuck open if it wouldn't start after filling it up with gas. May also explain the surging when stopped at a light.

 

[Natccrn]

Hello, so my Buick Encore is doing this, I stop at a light and It’s rocking back and forth. Engine light went on yesterday also. Any ideas what it could be? One more thing I forgot to post, I stopped to put gas in, my encore didn’t want to start. It kept turning over like wanting to, but no go. So I had to quickly push on the accelerator and it started. Once it started running it was fine. When I got home, I turned it off and started back again and it was fine like normal.

Mine was doing this too. I just changed the MAP sensor. It was really easy and the part was only $60. I watched how to change it on YouTube.