Engine/Transmission (1998.5 - 2002) Reloacting the AIT (Air Intake Temp) sensor?

[Morepower]

Has anyone relocating the AIT sensor to keep it from collecting carbon. I would be a lot easier to service some where else or would not require any service at all.

 

[emjay]

Do a search on this site for "IAT sensor" . You'll find discussions O'plenty on the subject.

 

[Morepower]

What about a false bypas plug in electrical fix?

 

[Summit]

my tech says....

my tech told me to put mine in the air cleaner box but you'd have to make a "jumper" harness. it'll always read colder airthan in the head.



my $. 02. later

 

[Morepower]

What about putting the AIT sensor in the intake manifold where it is under presure for a more accurate reading? It would not be so difficult to drill and tap the cast aluminum manifold.

 

[emjay]

My take on that is that it will get heated and read artificially high. The ECM will derate power if the intake air temp is too high. You want it to read cold because the ECM provides more fuel when the air is cooler.

 

[emjay]

DOH! I just noticed that the IAT sensor is in the head. Ok, forget what I said before about heating. Could it be that it needs to get the air temp after the intake air heaters?

 

[Morepower]

Some claim that if you are not getting near 20 mpg and something 15 or less that you should probably clean or replace the AIT sensor. So that means with a little carbon on it that it will over fuel a little all the time cause worse gas mileage. I will take my old one and plug it into the wiring harness and let it hang outside the engine compartment to see what happens next. In the winter time I will get crappy gas mileage but be over fueling kind of like our comp boxes? I have never gotten 20 mpg highway when doing the calculation by hand. Forget what the travel computer says. 17 mpg highway at best and 14-15 city with a 4x4 1-Ton.

 

[Marco]

I've done it.

I've relocated my IAT into the intake horn about a year ago.

No more soot on it also no other side effect.



Marco

 

[Morepower]

Finally,

Someone has done it. That would seem to me to be the logical choice. Because at higher boost and after the intercooler would give the best results instead of air inside the cylinder head with some exhaust gases. Do you know what size tap you used? I assume you just cut the wires and extended them?

 

[dmurdock]

Re: I've done it.

Originally posted by Marco

I've relocated my IAT into the intake horn about a year ago.

No more soot on it also no other side effect.



Marco

Marco, could you please post a picture? I'm just curious as to how far away from the grid heater the IAT needs to be to not get screwed up (signal wise) in cold weather.

 

[badams1]

Marco please a picture!

I am ready to roll on this IAT relocation and I like the air horn better than the air filter box location. Please give details like thread size, drill bit diameter and a picture if possible. If no pic just a good description would help. E mail -- email address removed --

Thanks in advance Billy Adams

 

[Marco]

IAT Pic.

Here you go.



I can't remember the size of the tap but I think I've used the same I used for the Pyro probe. For the drill bit, keep in mind you're working on aluminium ( yes even the Cummins uses recycled beer cans ) so use a smaller drill bit than you would use on iron. I then simply extended the wires and left the old IAT in the original location. Who knows, maybe I'll need a spare sometimes .



Marco

 

[Marco]

IAT in air filter box- No

I'm getting old, my memory is no longer the best!

I've forgotten to mention...



I don't think that relocating the IAT into the air filter box is a good idea. During the summer time that might work ( dunno about MPG) in the winter months it will not.

Can you immagine how long it will take for the grid heathers to stop cycling with the IAT in the air filter area?

Hey them two guys suck 180 ampere... .



Marco

 

[fj40charles]

Hey Marco,



Did you notice any difference after relocating the IAT? What were the performance differences if any?



Would you consider this a worthwhile activity for us thinking about doing it?



Thanks,

Charles

 

[Roger rodbolt]

I tapped the stock air horn some time ago, don't remember the exact size of the tap but it is metric. Some caution is needed as the stock air horn is very thin and the IAS needs a recess cut in the air horn to receive the oring. This leaves very few threads to hold, so I used a Tig welder to build up an area for thicker threads. I've since installed a Bully Dog Big Air intake and only run an intake air temp sensor in it. I think the relocation is a good thing but just use the right drill and tap or . Larry

 

[dmurdock]

Practical Solutions???

This would be a great gadget for them to sell. A relocation kit consisting of a new IAT and an extension wire with the correct male/female plugs already attached. HINT HINT HINT

 

[DSteinel]

Couldn't you just leave the old IAT in during the winter where it is at now, and re-locate a new, clean sensor over to the air box for summer time or when you really want a little extra performance? And for the guys that have their IAT in the air box how did you get the filter minder out, I would like to save it incasethis is not what I want to do