AIH Mod?
Lead Driver
Joined: Sep 2010
Posts: 7,793
Likes: 50
On the "return" charge tube, just before the spider collector assy, you'll see a plug, with a black and red cable from it. Remove that unit..(air intake heater/AIH), then go to Autozone, and getta dodge cummins drain plug, believe pitch is 22x1.50, for 12 buks, then install it. Remove the black cable and red cable that hooks to the relay, but make sure you re-install the blue wire at relay.
Post Fiend
Joined: Sep 2003
Posts: 6,096
Likes: 27
From: Mesa AZ
There is an electric heating element in the cool side of the intercooler pipes just before it splits to each cylinder head. The purpose of the heater is to heat the air on cold mornings. Seems a bit silly if you ask me because that air was just cooled by the intercooler and now they want to heat it up again? Go figure.
At any rate, that heater element can be removed and a fitting put there to tap off and connect a hose for a boost gauge. That is what most people do. If you don't have a boost gauge, you can still take out the heater and put a plug in that hole. Some people think the heater restricts airflow and removing it increases flow. Not sure if that is true or not but it seem plausible. Here is a pic.
At any rate, that heater element can be removed and a fitting put there to tap off and connect a hose for a boost gauge. That is what most people do. If you don't have a boost gauge, you can still take out the heater and put a plug in that hole. Some people think the heater restricts airflow and removing it increases flow. Not sure if that is true or not but it seem plausible. Here is a pic.
Lead Driver
Joined: Jan 2007
Posts: 6,708
Likes: 5
From: Kiowa CO
Pretty simple mod. It's removing the Air Intake Heater element from your intake path. You must have a loate '99 - '03 7.3. The early '99's didn't have an AIH.
Here's Clay's plug. It's very nice. Riffraff Diesel: RDP AIH Tapped Fitting
Here's a write up on how to remove the AIH that I copied from another site:
Remove the red wire (hot) from the air intake heater. Follow the red wire back to where it terminates at an electric solenoid. You'll need to remove this end of the red wire as well.
There is a blue wire attached to the same terminal post on the solenoid. Leave this blue wire attached. If you do not leave the blue wire attached, a diagnostic scanner cannot do a full contribution test on your vehicle. Do not ignore this.
After you remove the wires, unscrew the heater and remove it. The new plug fits easily in its place. Only snug the Air Intake Heater Plug as it seals with a rubber washer. DO NOT OVERTIGHTEN.
Keep any wires so that you can reverse the installation if you ever want to.
Here's Clay's plug. It's very nice. Riffraff Diesel: RDP AIH Tapped Fitting
Here's a write up on how to remove the AIH that I copied from another site:
Remove the red wire (hot) from the air intake heater. Follow the red wire back to where it terminates at an electric solenoid. You'll need to remove this end of the red wire as well.
There is a blue wire attached to the same terminal post on the solenoid. Leave this blue wire attached. If you do not leave the blue wire attached, a diagnostic scanner cannot do a full contribution test on your vehicle. Do not ignore this.
After you remove the wires, unscrew the heater and remove it. The new plug fits easily in its place. Only snug the Air Intake Heater Plug as it seals with a rubber washer. DO NOT OVERTIGHTEN.
Keep any wires so that you can reverse the installation if you ever want to.
Senior User
Joined: Jul 2009
Posts: 211
Likes: 0
From: Trona, CA
The AIH isn't always on and it's not economically viable to put in an intercooler bypass that works for 5 minutes every morning.
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,039
Likes: 74
The purpose of this product is to remove the restrictive Air Intake Heater from the intake air flow. Removing the AIH coil will not affect cold start up in any conditions. The PCM only commands the AIH to activate to reduce white smoke during extended long idle periods at low ambient temperatures. Specific conditions must be present before the heater is activated per Ford:
- Ambient temperature must be below 32°F
- Engine oil temperature (EOT) must be below 131°F
- Vehicle power must remain between 11.5 and 15.0 volts
- Parking brake must be applied
- The transmission must be in Park or Neutral
- Glow plugs must be off
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Elder User
Joined: Oct 2010
Posts: 701
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From: Western PA
FLEABAY has bread another moron! LOOK!
7.3 powerstroke AIH delete kit: eBay Motors (item 270653213416 end time Oct-29-10 21:03:45 PDT)
7.3 powerstroke AIH delete kit: eBay Motors (item 270653213416 end time Oct-29-10 21:03:45 PDT)
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PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,039
Likes: 74
FLEABAY has bread another moron! LOOK!
7.3 powerstroke AIH delete kit: eBay Motors (item 270653213416 end time Oct-29-10 21:03:45 PDT)
7.3 powerstroke AIH delete kit: eBay Motors (item 270653213416 end time Oct-29-10 21:03:45 PDT)
Must be so top secret they can't post a picture.
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
must be a lot of copy cats...every where you look that sells it it is writen that way...
http://www.dieselsite.com/index.asp?...PROD&ProdID=48
http://www.dieselsite.com/index.asp?...PROD&ProdID=48
- ambient temperature must be below 0 deg C (32 deg F)
- engine oil temperature must be below 55 deg C (131 deg F)
- vehicle power must be between 11.8 and 15 volts
- parking brake must be applied on manual transmission vehicles
- the transmission must be on park or neutral on automatic transmission vehicles
- glow plugs must be off
PREMIUM SPONSOR
Joined: Feb 2009
Posts: 6,039
Likes: 74
must be a lot of copy cats...every where you look that sells it it is writen that way...
http://www.dieselsite.com/index.asp?...PROD&ProdID=48
http://www.dieselsite.com/index.asp?...PROD&ProdID=48
- ambient temperature must be below 0 deg C (32 deg F)
- engine oil temperature must be below 55 deg C (131 deg F)
- vehicle power must be between 11.8 and 15 volts
- parking brake must be applied on manual transmission vehicles
- the transmission must be on park or neutral on automatic transmission vehicles
- glow plugs must be off
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Michael.simmons232
1999 - 2003 7.3L Power Stroke Diesel
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