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engine revs up and down--help

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Old Sep 20, 2008 | 08:34 PM
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jrairman
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Default engine revs up and down--help
i just changed my stock intake on a honda civic 1.6 to an aftermarket racing hi volume intake....i believe all vacuum connections are good....engine revs up and down between 1200-1700rpm every 2-3 seconds at idle....what could be the cause?
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Old Sep 22, 2008 | 10:28 PM
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From: Garage kept in Florida
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Can you give a little more info? Like what type of engine and such..Did you try to re-install the stock one again to see if it still does it?
Also, what brand of intake?
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Old Oct 7, 2008 | 08:11 PM
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F.I.T.V.= fast idle thermal valve.
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Old Oct 8, 2008 | 07:35 PM
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Originally Posted by ifiwasmeso
F.I.T.V.= fast idle thermal valve.
this was the problem for me.



or maybe try the I.A.C.V.
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Old Jan 18, 2009 | 06:43 AM
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From: erie
Default Odyssey revving up and down...
My 01 odyssey began surging in park and neutral between 1000 and 2000 rpm. check engine light came on, TCS would not go off after warm. Map Sensor fixed it for me.
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Old Jan 24, 2009 | 11:14 AM
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From: WV
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check ur idle air control valve
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Old Jan 26, 2009 | 06:09 AM
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From: erie
Default Not so fast...
My odyssey has just been put back in the shop with the same problem again! The new map sensor did not fix the problem... we'll see what they say. Is the consensus the F.I.T.V. or the Idle air control valve?
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Old Jan 27, 2009 | 03:31 PM
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Iac
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Old Feb 2, 2009 | 05:50 AM
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From: erie
Default Not the Map sensor
I posted the Map sensor for the 01 Odyssey, it did not fix it , it was the FITV. The codes pulled were indicating map sensor, had to go back and install the FITV.
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