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fuel filter replaced, now harder to start..??


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see, that's the other strange thing, it runs great, good acceleration, excellent mpg at 30, starts fine cold...just not warm...

The fuel filter is a red herring maybe and you need to check out your coolant temp sensor?

 

And reset your ECU. I know my car started out having some problems with the extra fuel that was coming through the new filter until it learned it.

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