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Old 04-07-2021, 03:50 PM   #4
prumpfy
Starter Motor
 
Join Date: Sep 2019
Posts: 10
Default Re: LS Focus rough idle poor economy

Have had trouble in the past, with the 2006 LS focus fuel consumption. My posting in another forum section covers the matter. Look for my name to find it.
My problem was due to a faulty thermostat, which, because the car was used on short runs over a long period of time, allowed significant build up of crud in the throttle body, with the motor running cold. I believe this is a Focus problem.

Cleaning the throttle body fixed the problem, but the related matter of high revs on startup was not addressed. Will look into this soon.


prumpfy.
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