Little Bruce Posted October 24, 2023 Share Posted October 24, 2023 I have a 2010 Fusion SEL. When I'm stopped at a light or stop sign the engine seems to start surging. What is causing this I had it at a local mechanic for a tune-up, it started doing this after I picked it up. I thought it was because when he did an oil change he put in synthetic oil, which I have never used before. 0 Quote Link to comment Share on other sites More sharing options...
WKelley Posted October 24, 2023 Share Posted October 24, 2023 I'd be looking for vacuum leaks. Check the flexible air intake hose that connects to the throttle body from the airbox. Differing oil will do nothing. 0 Quote Link to comment Share on other sites More sharing options...
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