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Old 07-15-2010, 03:36 AM   #1
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rpm drop

Only when using the air conditioner on a 2000 v6 does the rpms drop and the engine runs rough. Is it a solenoid and if so what is the correct name for the part?
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Old 07-15-2010, 08:24 AM   #2
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Re: rpm drop

they all have that issue due to the load on the car, the IAC (idle bypass valve) controls idle rpm its on the upper intake near the throttle body and is round~ that might have something to do with it, also clean your maf with electronic on contact NO residue cleaner.
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Old 07-15-2010, 01:04 PM   #3
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Re: rpm drop

I thought there would be a solenoid to bump up the rpms with the air on.
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Old 07-18-2010, 02:29 PM   #4
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Re: rpm drop

I'm entering this message again hoping someone can help me with it.
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Old 07-18-2010, 04:11 PM   #5
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Re: rpm drop

compressor?
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Old 07-18-2010, 04:43 PM   #6
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Re: rpm drop

An IAC (idle air control) motor is designed to adjust the engine
idle RPM speed by opening and closing an air bypass passage inside the throttle body. The cars computer or ECM (electronic control module) receives information from various sensors and will output signals to adjust the IAC motor in or out to adjust engine idle speed by controlling engine idle air. An IAC motor can fail one of two ways, either the motor short circuits and stops working or the motor will develop high resistance and cause the IAC control motor to react slowly, either failure can cause the engine to stall at idle. When a trouble code
scan is performed it sometimes won't always detect a failed or weak IAC motor. To check the IAC motor remove the unit, with the wires connected turn the key to the "on" position without starting the engine, the IAC should move in or out. If the IAC motor does nothing it has probably failed, replace it with a new unit and recheck system. Note: while the IAC motor is removed clean (use aerosol carburetor cleaner) the passages the IAC uses to control idle air speed, also inspect the IAC for a build-up on the seating (pointed) end and clean as necessary.
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Old 07-18-2010, 04:50 PM   #7
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Re: rpm drop

wow
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Old 07-18-2010, 04:54 PM   #8
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Re: rpm drop

Quote:
Originally Posted by zztop1234 View Post
wow
?
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Old 07-21-2010, 02:57 PM   #9
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Re: rpm drop

Thanks to your info I cleaned the maf and reprogramed the computer. The car is running great. I recently changed the CAI filter and oil from the filter might have fouled up the MAF.
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Old 07-22-2010, 08:59 AM   #10
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Re: rpm drop

well it could have been the compressor LOL..i always lose when it comes to diagnosis LOL...there always 5 to 20 different things that can cause the same symptoms its just a matter of ruling them out..i always find the details to rule out many as possible and get it down to 4 or 5 but i always choose the wrong one...i would make a horrible doctor lol
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