my 2003 ford fiesta is over-revving when idling. It has an automatic choke
which may be stuck. Is there any way I could fix this myself?
If it is a stuck choke here is a good article about
A carburettor (auto ckoke) on a 2003 Fiesta.? .... I dont think so.
More likely to be be a sensor fault (speed sensor likely) or possibly its lost what I call base settings. Take it to an auto electrical technician and have its fault data base read to see if there are any faults stored. Then get a quote.
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The 'auto choke' is located on the very top of the throttle body, and is ECM controlled. So you could have either a faulty valve, or a blown idle circuit in the ECM.
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