julie marks since we do not know what was replaced, this is a difficult one to answer. I suggest you get it hooked up to a scan tool (Autozone etc. does it for free) and see if it comes up with a "throttle/pedal position sensor" issue. this would be the most common cause for limp mode on your year. Disconnect the battery for a while then reconnect and see if this clears the issue. If it does not or it returns think about replacing the TPS (throttle position sensor) which causes an awful lot of Mustang owners grief.
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julie marks since we do not know what was replaced, this is a difficult one to answer. I suggest you get it hooked up to a scan tool (Autozone etc. does it for free) and see if it comes up with a "throttle/pedal position sensor" issue. this would be the most common cause for limp mode on your year. Disconnect the battery for a while then reconnect and see if this clears the issue. If it does not or it returns think about replacing the TPS (throttle position sensor) which causes an awful lot of Mustang owners grief. It is not a difficult repair. The TPS is on the side of the throttle body and all you need to do is to If you can take out 2 screws and put them back in with the new sensor
julie marks since we do not know what was replaced, this is a difficult one to answer. I suggest you get it hooked up to a scan tool (Autozone etc. does it for free) and see if it comes up with a "throttle/pedal position sensor" issue. this would be the most common cause for limp mode on your year. Disconnect the battery for a while then reconnect and see if this clears the issue. If it does not or it returns think about replacing the TPS (throttle position sensor) which causes an awful lot of Mustang owners grief.