Aih Mod
Postmaster
Joined: Jan 2004
Posts: 4,758
Likes: 7
From: colorado
you are probably talking about this:http://www.dieselsite.com/index.asp?...PROD&ProdID=48 you may have to cut and paste the link
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Air Intake Heater plug is designed to heat incoming air on cold starts. It only comes on when ambient air and oil temp is below a certain point (can't remember off hand). It is designed to reduce white smoke on startup from unburnt fuel. Does it work? Well it's limited. Can you do without it? Yes and it's supposed to clear some of the restriction in the intake. The one from that Dieselsite link is just a plug. There are others with a bung to tie in a boost gauge at that location which is supposed to work really well. I think when I eventually feel like getting gauges and upgrading my truck I'll go that route.
Postmaster
Joined: Jan 2004
Posts: 4,758
Likes: 7
From: colorado
Originally Posted by CHAD250CC4X4
How can you tell if this has been done?
Senior User
Joined: Nov 2004
Posts: 282
Likes: 0
From: Central Wyoming
Originally Posted by Pocket
Air Intake Heater plug is designed to heat incoming air on cold starts. It only comes on when ambient air and oil temp is below a certain point (can't remember off hand). It is designed to reduce white smoke on startup from unburnt fuel. Does it work? Well it's limited. Can you do without it? Yes and it's supposed to clear some of the restriction in the intake. The one from that Dieselsite link is just a plug. There are others with a bung to tie in a boost gauge at that location which is supposed to work really well. I think when I eventually feel like getting gauges and upgrading my truck I'll go that route.
Posting Guru
Joined: Feb 2004
Posts: 1,873
Likes: 1
From: Phx, AZ
Originally Posted by kilapapipa
I pulled the plug and sawed off the spring and ceramic with a hack saw before putting the plug back in. $0 dollar mod
This sounds like a cheap mod but you can never return it back to stock. The plug only costs 8.00 so if you are going to do it I would just spend the few bucks and keep the original part just in case you need it.
Fire Rooster
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Senior User
Joined: Nov 2004
Posts: 282
Likes: 0
From: Central Wyoming
Good point, I am off Warranty so no need to go back to stock for dealer sake. I guess you may want to go back to stock if your truck usage changes.
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Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Originally Posted by kilapapipa
It is my understanding that the AIH only comes on during long idle periods and that the AIH relay and GPR relay cannot be on at the same time so the AIH does not help with cold starts. My info. is from what I have read on this and other sites. This is why it is not necessary to have it. All I did is remove the hot wire from the relay and the ground from the right side of the motor and then, I pulled the plug and sawed off the spring and ceramic with a hack saw before putting the plug back in. $0 dollar mod
Senior User
Joined: Feb 2004
Posts: 270
Likes: 0
From: Scranton, PA
On some trucks you might see a code after removing the AIH. The code won't effect the truck's performance, but if you bring it in for warranty work, they will see the code. That's why I suggest buying the plug and keeping the original AIH, so you can through it back in if needed. And it's not just CA trucks that through the code.
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