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My Evo 9 is idling to high check engine keeps coming up.

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Old Jun 30, 2011, 12:11 AM
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My Evo 9 is idling to high check engine keeps coming up.
car idles around 1,100 rps at all times and check engine keeps coming on and off.

what could be the problem?

I'm new with evo's so don't know whats up.
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Old Jun 30, 2011, 12:13 AM
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We need to know what the code is to help you.
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Old Jun 30, 2011, 12:43 AM
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i will check the code tomorrow.
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Old Jul 24, 2011, 12:08 PM
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ok, finally check engine came on after driving if for couple days.

Here's the check engine code: P0507
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Old Jul 24, 2011, 12:11 PM
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prob need to change iac valve
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Old Jul 24, 2011, 01:48 PM
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No you need to adjust the BISS screw...
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Old Jul 24, 2011, 01:59 PM
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Originally Posted by EvoSportz
car idles around 1,100 rps at all times and check engine keeps coming on and off.

what could be the problem?

I'm new with evo's so don't know whats up.
can you tell us previous series of event that lead to this problem...who was digging in your car and why. What parts you changed or altered.. Thanks
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Old Jul 25, 2011, 11:39 AM
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Where is the BISS screw?

history of the car:

bought it already modded, it has a full exhaust, upgraded injectors, fuel pump, upgraded intercooler and piping, intake.
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Old Jul 25, 2011, 12:01 PM
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the BISS is on the top of the trottle body. U NEED to do this while in SAS mode in EvoScan, or the ecu will learn itself back to the original setting.
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Old Jul 29, 2011, 05:04 PM
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ok problem went away.

thanks for every ones help.
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Old Jul 29, 2011, 10:12 PM
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why did it "go away"?
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Old Jul 31, 2011, 11:02 AM
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i adjusted the BISS screw.
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