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Poor mileage, won't idle 200

posted by  burchmania on  Sun May 27 09:41 CST 2012
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last visit: Fri Dec 7 13:22 CST 2012
[RELATED]

My 1990 240, 5 speed is getting poor mileage and basically won't idle (RPMs are too low do it dies).

I pulled a plug and it looked rather like it has a rich mixture (too much black).

I realize there are many things possible, but if anyone has any ideas I'd appreciate hearing them.

The car runs pretty well otherwise.


Thanks!








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    Poor mileage, won't idle 200

    posted by  LoveMy240Wagon on  Sun May 27 11:08 CST 2012
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    last visit: Tue Dec 31 09:52 CST 2013
    [RELATED]

    Air mass meter, possibly oxygen sensor.

    Got any codes?

    Could also have more than one issue.

    Clean flame trap & flush PCV system. Clean throttle body, check for vacuum leaks.

    Check Idle Air Controller too once other items are done.








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      Poor mileage, won't idle 200

      posted by  burchmania on  Sun May 27 15:06 CST 2012
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      last visit: Fri Dec 7 13:22 CST 2012
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      Thank you.

      I checked the Fault Codes and got a 2-2-4, which is Coolant Temp Sensor.

      So, I'll replace this first and see if this evens things out mixture wise, and go from there, and will circle back.

      (looks ugly to replace...)








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        Poor mileage, won't idle 200

        posted by  burchmania on  Mon Jun 4 14:16 CST 2012
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        last visit: Fri Dec 7 13:22 CST 2012
        [RELATED]

        Swapped out the Coolant Temp Sensor (loosened intake manifold and pulled away from cyl head, was able to get a 7/8" box wrench end over the electrical socket and onto the sensor to remove).

        Car runs really well. And it idles!


        Thanks,

        Steve








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        Poor mileage, won't idle 200

        posted by  flood on  Mon May 28 07:36 CST 2012
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        last visit: Fri Oct 24 05:07 CST 2014
        [RELATED]

        Just don't try uro brand...I got a bad one, had it replaced, second one bad, then ordered a bosch brand, now all smiles. Three shipping charges!!--(the cheapest man spends the most)







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