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IMRC on Ford engines? #4474150
07/29/17 07:44 PM
07/29/17 07:44 PM
Joined: Apr 2012
Posts: 2,697
West Michigan
buck91 Offline OP
buck91  Offline OP
Joined: Apr 2012
Posts: 2,697
West Michigan
Can anybody school me on Intake manifold runner control on a Ford 4.2L V6? Daughter's 05 F150 is stalling out occasionally when idling in drive. Only dtc is P2006 "Intake manifold runner control stuck closed bank1." Would this cause a potential stall? What the heck is it?


2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: IMRC on Ford engines? [Re: buck91] #4474161
07/29/17 08:07 PM
07/29/17 08:07 PM
Joined: Dec 2016
Posts: 7,117
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,117
Waco, TX
It might affect full throttle power (They open up over 3000 RPM)
...but will not ever affect "stalling out occasionally when idling in drive"


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: IMRC on Ford engines? [Re: buck91] #4474178
07/29/17 08:33 PM
07/29/17 08:33 PM
Joined: Aug 2006
Posts: 9,883
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,883
Central Washington
Yeah, They are closed below 3k anyways, so would not effect idle.
I suspect the electronic throttle body is dirty. I had a issue with a same year F150 not too long ago
https://bobistheoilguy.com/forums/ubbthr...ess#Post4009536


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: IMRC on Ford engines? [Re: buck91] #4474195
07/29/17 08:51 PM
07/29/17 08:51 PM
Joined: Jul 2016
Posts: 682
il usa
merconvvv Offline
merconvvv  Offline
Joined: Jul 2016
Posts: 682
il usa
I might have to look at the throttle body on my expedition.
Its never been cleaned and its at 181k miles.
I do hear a purring sound esprcially when idling and low rpm only when i am in the expe but cannot be hearx on the outside. I dont know if this is normal since lot of bitog members say their car is purring good. Funny but being serious at same time.

Last edited by merconvvv; 07/29/17 08:52 PM.

1988 Mazda RX7 na PP 10w30 Noack 4.7
1994 Chrysler Concorde 3.3
1999 Ford Expedition 4.6 QSUD 10W30 NOACK 5.0
Re: IMRC on Ford engines? [Re: buck91] #4474216
07/29/17 09:14 PM
07/29/17 09:14 PM
Joined: Apr 2010
Posts: 13,537
Chicago, IL
dparm Offline
dparm  Offline
Joined: Apr 2010
Posts: 13,537
Chicago, IL
Originally Posted By: buck91
Can anybody school me on Intake manifold runner control on a Ford 4.2L V6? Daughter's 05 F150 is stalling out occasionally when idling in drive. Only dtc is P2006 "Intake manifold runner control stuck closed bank1." Would this cause a potential stall? What the heck is it?



Do those things have a multi-stage intake manifold? On one of my older Fords, it did have an IMRC because the intake manifold was two stage; there was a vacuum line that would change the runners for low versus high RPM power.

If there is a problem there, it could cause a stall since it is starving the engine of air.


2017 Chevrolet Corvette Grand Sport
Re: IMRC on Ford engines? [Re: buck91] #4474223
07/29/17 09:35 PM
07/29/17 09:35 PM
Joined: Aug 2006
Posts: 9,883
Central Washington
Colt45ws Offline
Colt45ws  Offline
Joined: Aug 2006
Posts: 9,883
Central Washington
It cant starve the engine of air at idle because its function is to block off the short, fat intake manifold runners deigned for high-rpm power so the engine draws though the always open long thin runners that prefer torque. If they are stuck the engine will just be more of a dog than it usually is.


-Colton
2002 Ford Crown Vic PI 207k, Ex-Kootenai County, ID Unit #42
Down for engine swap
2003 Ford Crown Vic PI 75k
Castrol EDGE HM 5W30, Fram XG2
Re: IMRC on Ford engines? [Re: buck91] #4474453
07/30/17 07:40 AM
07/30/17 07:40 AM
Joined: Apr 2012
Posts: 2,697
West Michigan
buck91 Offline OP
buck91  Offline OP
Joined: Apr 2012
Posts: 2,697
West Michigan
So might be worth fixing but shouldn't be causing a stall. Dang. Guess I'll have to start diagnosing the hard way.


2011 F150 4x4 5.0L
1996 Mustang GT 5spd/ragtop
Re: IMRC on Ford engines? [Re: buck91] #4474499
07/30/17 08:28 AM
07/30/17 08:28 AM
Joined: May 2016
Posts: 293
New England
NibbanaBanana Offline
NibbanaBanana  Offline
Joined: May 2016
Posts: 293
New England
I changed the IMRC bushings in my E150 when I changed the isolator bolts. The $.50 Dorman bushings don't fit. If you have to change the bushings get the $7 Ford bushings. Supposedly they brake. They are plastic and get brittle over time.

On the E150 the IMRC is simple to get to and inspect. From what I heard, it is almost impossible on the F150. It is bolted on the rear of the intake manifold. Just a small device to actuate two link arms that turn shafts going through the intake manifold. Maybe you can feel back there to see if the linkage is still attached. Or get a mirror and look. If the linkage is not connected, you should be able to hear them rattling around.


1993 Ford E350 5.8L, 68K
2002 Ford E150 4.2L, 85K
2006 Chevy Aveo 1.6L 215K
2013 Kia Reo 1.4L, 101K
7500 OCI, M1 5-30 winter, M1 10-30 summer

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