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low rpm/ high rpm/ vss

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Old Aug 20, 2010
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low rpm/ high rpm/ vss

just finished rebuilding my D16y8 (97 honda ex )
engine started rt up and sounds great.
but i can't figured out why the idle goes up and down
2nd now i am having a problem with the speed sensor.
car was running okay before.never had any problem with trans(auto)
i did break my knock sensor....replaced it
could it be the map sensor?
help....
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Old Aug 20, 2010
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Re: low rpm/ high rpm/ vss

Could be the jack valve, have to be very clean

or another hose in the intake manifold are they well connected?
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Old Nov 27, 2010
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Re: low rpm/ high rpm/ vss

Where's the jack Valve located?
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