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Fiesta surging, stalling, decreased performance.

Messages
1
Likes
0
City
Brookline
State
MO
Country
United States
What I Drive
2011 Ford Fiesta SES Standard
#1
Hi guys, I have a 2011 ford fiesta with 250k on it. Recently it’s been having performance issues. It’s been stalling occasionally, loss of fuel efficiency, and intermittent idle issues (will rev up or down beyond normal rpm). Through all of this there have been no codes on dash. I’ve cleaned the throttle body, cleaned mass air flow sensor, checked evap purge valve, and replaced all spark plugs and wires.
I ordered a new mass air flow sensor, not sure if that will fix it though.
sometimes the traction control light will come on (without rain or moisture as a factor).
I haven’t been able to check the wheel speed sensors yet. Could that be a contributing factor, or does anyone have other ideas?
Thanks!
 


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