2018 Ford Fusion 2.5 liter 103000
Wife's car surging at highway speeds, passing or merging on highway. No codes present.. I did replace plugs and drained and filled trans since of mileage of car. Looked on forums on Facebook and said could be a purge valve. I did ask wife if she overfills gas tank, and she does! I told her to stop doing that. Since no codes, am I looking at a purge valve? I have an ALLDIAG scanner, not sure what to look for. Any help would be appreciated.
Thank! Dave Brown
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Well, if the purge valve is sticking open it could do that. But more often it's something like a clogged fuel filter a week fuel pump or just worn out spark plugs or a clogged air filter. Pay. It's not more complex like a transmission problem which will also do that
