2004 Ford Focus IMRC

2004 FORD FOCUS
134,000 MILES • 4 CYL • FWD • AUTOMATIC
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BADSPARKY74
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My Check Engine light came on this morning, so the mechanic I normally use read it with his little machine, it said "Intake Manifold Runner Control Stuck Open Bank 1". I would like to know if there's a way I can fix it myself, and also, since times are so tough right now, do I have to fix it NOW? What's the damage to the car if I just run some cleaner through the fuel and keep on driving? The mechanic said it could be a clip broken off, it could be a vacuum hose cracked, it could be the actual motor. I need to be better prepared when I take it in to be disected. Please help.
Sep 10, 2010 at 6:10 PM
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RASMATAZ
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Hi badsparky74, Welcome to 2carpros and TY for the donation this is what keeps the site going

Could be one of the things he mentioned

Intake Manifold Runner Control Systems

The Intake Manifold Runner Control (IMRC) consists of a remote mounted, electrically motorized actuator with an
attaching cable for each housing on each bank. Some applications will use one cable for both banks. The cable or
linkage attaches to the housing butterfly plate levers. (The 2.0L (2V) Focus/Escort IMRC uses a motorized actuator
mounted directly to a single housing without the use of a cable.)
The IMRC housing is an aluminum casting with two intake air passages for each cylinder. One passage is always
open and the other is opened and closed with a butterfly valve plate. The housing uses a return spring to hold the
butterfly valve plates closed. The motorized actuator houses an internal switch or switches, depending on the
application, to provide feedback to the PCM indicating cable and butterfly valve plate position.
Below approximately 3000 rpm, the motorized actuator will not be energized. This will allow the cable to fully
extend and the butterfly valve plates to remain closed. Above approximately 3000 rpm, the motorized actuator will
be energized. The attaching cable will pull the butterfly valve plates into the open position. (Some vehicles will
activate the IMRC near 1500 rpm.)
Sep 14, 2010 at 5:35 AM
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BADSPARKY74
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My mechanic replaced the actuator, and the code P2004 came back up after a few miles. I wonder if something could be stuck inside the butterfly valve?
Sep 18, 2010 at 9:02 AM
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RASMATAZ
  • ✓ASE Certified Mechanic
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He needs to double check the motorized actuator if its actually doing its job-could be wiring problem or the computer itself

The motorized actuator houses an internal switch or switches, depending on the
application, to provide feedback to the PCM indicating cable and butterfly valve plate position.
Below approximately 3000 rpm, the motorized actuator will not be energized. This will allow the cable to fully
extend and the butterfly valve plates to remain closed. Above approximately 3000 rpm, the motorized actuator will
be energized. The attaching cable will pull the butterfly valve plates into the open position. (Some vehicles will
activate the IMRC near 1500 rpm.)
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Sep 18, 2010 at 4:14 PM
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