Aih ?
Lead Driver
Joined: May 2007
Posts: 5,613
Likes: 9
From: Flagstaff, Arizona
It's for the Auxillary intake heater. It's on the spider on the cold side, you just remove it, and put the delete plug in there. The heating element itself is HUGE.....it blocks airflow on the intake. It's a 5 minute mod....and costs like $5 bucks, I had a post awhile back where I posted the part number at Napa. The heater is a waste unless you live where it is VERY cold winters, and you let your truck idle for long periods. The mod won't do much for performance.....but the more airflow you get the better! 
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Laughing Gas
Joined: May 2007
Posts: 1,100
Likes: 0
From: Davis, Ca.
Thanks for the reply. I kept seeing this, AIH, pop up here and there but no info was ever really said about it. Except for alot of people seem to have it. Always wondered if it was something I should do but always forgot to ask.
Snowboard season cometh..
Joined: Jan 2006
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From: Gulf Coast of Florida
If the performance of this site wasn't such CRAP in the mornings lately, I'd have had this link up for you 1/2hr ago.... anyway...
AIH plug w/ boosht fitting
AIH plug w/ boosht fitting
Lead Driver
Joined: May 2007
Posts: 5,613
Likes: 9
From: Flagstaff, Arizona
I found my post where I listed the part number at Napa for the AIH delete. It's actually the exact same thing as a drain plug for a Cummins lol https://www.ford-trucks.com/forums/7...completed.html
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If the performance of this site wasn't such CRAP in the mornings lately, I'd have had this link up for you 1/2hr ago.... anyway...
AIH plug w/ boosht fitting
AIH plug w/ boosht fitting
Is there any other place to get boost from? Is the accuracy the same? Does removing the AIH through any codes?
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
I just cut the heating element off mine, crushed the ceramic with channel locks, and cut the off the stand-off. I left the tee in my MAP sensor line for the boost gauge for now. That will work but to finish the more "elegant" solution, I'll get the Cummins plug and drill & tap for the boost tube adapter. The code for the AIH is a "soft" code, which means a code is stored, but not CEL is set.
Here's what it looks like right now:
Here's what it looks like right now:
Post Fiend
Joined: Feb 2007
Posts: 14,541
Likes: 2
From: Dallas-Ft. Worth
The thing you labeled "Boost Line" is for the boost gauge. The line labeled with a "?" goes to the MAP sensor, unless you have an OverBoost Annihilator like I do, then it goes to the MAP sensor after the OBA. The holes you're pointing to are the mounting holes for the waste gate solenoid. My van turbo has no waste gate, so I removed all that stuff. The stud looking thing you labeled with a "?" is the AIH with all the wires removed.
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