2018 5.0 IAC
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7th Gear
Joined: Feb 2023
Posts: 7
Likes: 2
2018 5.0 IAC
I have been a wrench on Fords, GM, Chevrolet, 18 wheelers, Nissan, Cadillac, and Jaguar, certified in all, not bragging, just fact
I have a 2018 f150 XLT 5.0 and cannot locate the IAC, though I purchased one from a parts store, with a Motorcraft no.
It has 138000 miles and am going to be cleaning the throttle body and would like to replace the IAC as well
Anyone know where it is located, cannot find any info at all on a 2018 5.0
Thanks
I have a 2018 f150 XLT 5.0 and cannot locate the IAC, though I purchased one from a parts store, with a Motorcraft no.
It has 138000 miles and am going to be cleaning the throttle body and would like to replace the IAC as well
Anyone know where it is located, cannot find any info at all on a 2018 5.0
Thanks
Logistics Pro
Joined: Jun 2017
Posts: 3,989
Likes: 517
From: Edmond, OK
RockAuto lists this IAC, 2IAC0407 made by Holstein. Of course, Rockauto and other online parts suppliers have been known to be wrong.
It should be mounted on the side; or very near, the throttle body. Unless it's damaged or malfunctioning I don't know of any other reason to replace one. Since you plan on removing the throttle body to clean it just take off the IAC and clean it too with a soft bristle brush and carburetor/throttle body cleaner.
If you do remove the IAC to replace or clean it be careful removing the machine screws. Some cars I've worked on the screws are sweged into place. Good luck.
https://www.rockauto.com/en/catalog/...ac)+valve,6072
It should be mounted on the side; or very near, the throttle body. Unless it's damaged or malfunctioning I don't know of any other reason to replace one. Since you plan on removing the throttle body to clean it just take off the IAC and clean it too with a soft bristle brush and carburetor/throttle body cleaner.
If you do remove the IAC to replace or clean it be careful removing the machine screws. Some cars I've worked on the screws are sweged into place. Good luck.
https://www.rockauto.com/en/catalog/...ac)+valve,6072
Thread Starter
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7th Gear
Joined: Feb 2023
Posts: 7
Likes: 2
2018 5.0 IAC
Thanks for the fast reply, that is where I was looking as that is where it should be. I did get one from Rock Auto with that part no. and and also has the correct Motorcraft no.
So when I pull the throttle body top clean it I will know more and post my findings
So when I pull the throttle body top clean it I will know more and post my findings
Lead Driver
Joined: Nov 2020
Posts: 7,128
Likes: 1,945
From: Sportsman's Paradise
IIRC the last year the IAC was used on the F150 was 2003. Right before I left the dealer in 2004 I remember poking around under the hood on a new truck we just got in from the factory and noticing the new electronic throttle body (thought to my self this must be that drive by wire system they told us about), no IAC and an integrated EGR valve, solenoid and dpfe sensor all rolled into one unit.
Logistics Pro
Joined: Jun 2017
Posts: 3,989
Likes: 517
From: Edmond, OK
Thanks for the input and confirming the lies from RockAuto gents.
When I had a 2003 F150 ccsb I ordered some parts from RockAuto and they were wrong. It was a throttle body gasket for the 5.4l. I think it was for a van so it didn't fit the 5.4l in my truck.
When I had a 2003 F150 ccsb I ordered some parts from RockAuto and they were wrong. It was a throttle body gasket for the 5.4l. I think it was for a van so it didn't fit the 5.4l in my truck.
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Thread Starter
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7th Gear
Joined: Feb 2023
Posts: 7
Likes: 2
2018 5.0 F150
So, I removed the throttle body and cleaned, was very carboned up. IAC is integrated with the throttle body, that is why they are $600.00!
Why parts stores show a separate IAC is beyond me, there is one on the 2016, not sure on the 2017, but the 2018 for sure does not have a separate one.
Anyway, cleaned and had to use 800 w/d sandpaper and now idle very steady 550, smooth shifting and great accel ....no more dying at idle from time to time
139000 miles so I am not complaining
Why parts stores show a separate IAC is beyond me, there is one on the 2016, not sure on the 2017, but the 2018 for sure does not have a separate one.
Anyway, cleaned and had to use 800 w/d sandpaper and now idle very steady 550, smooth shifting and great accel ....no more dying at idle from time to time
139000 miles so I am not complaining
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Thread Starter
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7th Gear
Joined: Feb 2023
Posts: 7
Likes: 2
2018 F150 5.0 Idle issue
So after cleaning the throttle body, which was very dirty, took it for a run and did very well
Second time I took it out the same ole crap started again, come to a stop, idles down to 550 and then drops lower, back up, lower then dies....
very intermittent....been doing this for the past 40000 miles, just very intermittent and no engine light at all, makes me think it is a mechanical issue, like maybe the integrated IAC on the throttle body may have a problem....
Any thoughts any one?
Thanks
Second time I took it out the same ole crap started again, come to a stop, idles down to 550 and then drops lower, back up, lower then dies....
very intermittent....been doing this for the past 40000 miles, just very intermittent and no engine light at all, makes me think it is a mechanical issue, like maybe the integrated IAC on the throttle body may have a problem....
Any thoughts any one?
Thanks
Moderator
Joined: May 2005
Posts: 8,237
Likes: 1,248
From: San Antonio, TX
Well, I was think why not soak it in a can of carb cleaner, or an ultrasonic clean. But, the electrical parts wouldn't survive that, so we are stuck with expensive throw always parts that can't be serviced. Hell, today I spent 20 minutes fixing a damn broom. I hate throwing away stuff that is mostly still good. But that's they way stuff is engineered today, remove and replace.
Hotshot
Joined: Jan 2004
Posts: 19,768
Likes: 1,082
From: St Louis
As I pointed out previously, there is no IAC in your truck, integrated or otherwise. Engine Idle speed control on the "fly by wire" systems is accomplished by the PCM using the ETB's DC motor to modulate the opening of the throttle plate.
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7th Gear
Joined: Feb 2023
Posts: 7
Likes: 2
IOAC
Totally understand, and I am a bit old school. Though the idle is controlled by the ECM and the ETB I just have a tendency to refer to it as an 'integrated IAC' since in essence that is how I see it, wrong as I may be.
The idle is controlled by adjusting the butterfly in the ETB and there fore controlling air/fuel mix ratio and, still mechanical but through electronics, I get it and thank you for the kind explanation, very much appreciated
Been a few years since I turned wrenches in a shop, back in 1990 when I saw the major trend toward electronics in autos, I went and got a Degree in Applied Science of Electronic Technology, 31/2 years straight through, 4 nights a week, 4 hours a night with one week off at Christmas
After graduating was hired by Lam Research to be a Crew Chief Field Service Engineer in Semi-Conductors, so that kinda ended my 'wrenchin days'......
Anyway, Thanks again!
The idle is controlled by adjusting the butterfly in the ETB and there fore controlling air/fuel mix ratio and, still mechanical but through electronics, I get it and thank you for the kind explanation, very much appreciated
Been a few years since I turned wrenches in a shop, back in 1990 when I saw the major trend toward electronics in autos, I went and got a Degree in Applied Science of Electronic Technology, 31/2 years straight through, 4 nights a week, 4 hours a night with one week off at Christmas
After graduating was hired by Lam Research to be a Crew Chief Field Service Engineer in Semi-Conductors, so that kinda ended my 'wrenchin days'......
Anyway, Thanks again!
Lead Driver
Joined: Nov 2020
Posts: 7,128
Likes: 1,945
From: Sportsman's Paradise
Totally understand, and I am a bit old school. Though the idle is controlled by the ECM and the ETB I just have a tendency to refer to it as an 'integrated IAC' since in essence that is how I see it, wrong as I may be.
The idle is controlled by adjusting the butterfly in the ETB and there fore controlling air/fuel mix ratio and, still mechanical but through electronics, I get it and thank you for the kind explanation, very much appreciated
Been a few years since I turned wrenches in a shop, back in 1990 when I saw the major trend toward electronics in autos, I went and got a Degree in Applied Science of Electronic Technology, 31/2 years straight through, 4 nights a week, 4 hours a night with one week off at Christmas
After graduating was hired by Lam Research to be a Crew Chief Field Service Engineer in Semi-Conductors, so that kinda ended my 'wrenchin days'......
Anyway, Thanks again!
The idle is controlled by adjusting the butterfly in the ETB and there fore controlling air/fuel mix ratio and, still mechanical but through electronics, I get it and thank you for the kind explanation, very much appreciated
Been a few years since I turned wrenches in a shop, back in 1990 when I saw the major trend toward electronics in autos, I went and got a Degree in Applied Science of Electronic Technology, 31/2 years straight through, 4 nights a week, 4 hours a night with one week off at Christmas
After graduating was hired by Lam Research to be a Crew Chief Field Service Engineer in Semi-Conductors, so that kinda ended my 'wrenchin days'......
Anyway, Thanks again!
The ETC modifies air flow via butterfly to maintain proper engine operation over a wide range of RPM's from idle to wide open throttle without the use of a mechanical cable, "Drive by wire" . The IAC cannot perform that function, it can only modify idle speed ....and.... the IAC strategy on Fords has been dead for 20 years.
