IAT Sensor - Cleaning

01-08-2006, 08:57 AM

Tech Article thanks to Fritz

The IAT sensor measures the temperature of the intake nmanifold. The ECM uses this sensor reading to set injection timing and adjust the air-fuel ratio. If the fuel mileage and power output of you engine seem low, some owners have found improvement in EGT, fuel economy, and power after cleaning carbon from the IAT sensor in at the rear of the intage manifold. Engine with exhaust brakes are particularly prone to IAT sensor fouling because soot is blown back into the intake during valve overlap.

Last edited by Andy : 03-24-2007 at 02:45 PM.

Jakey's'01H.O. · 01-08-2006, 09:44 AM

i cleaned mine a few K miles ago, and it was black...but my sender is 'stuck' to one side of the cage..i never checked the voltage, but think it's alright? My mileage isnt totally bad either...and w/o an exhaust brake, how often are you guys cleaning the thing???

__________________
'01 ETH/SO VP.
[HOLLAND COURT DIESEL PERFORMANCE. COALTRAIN IS THE SH$T

01-08-2006, 09:47 AM

I run an exhaust brake so I clean mine every 10k, its amazing how much smother the truck idles at when clean, I think this also helps MPG

Jakey's'01H.O. · 01-28-2006, 06:34 PM

Just pulled my iat sensor out again, and its black, and kinda wet....????? Definitely Not dry. drove it maybe 45 minutes ago??? what is the deal?????

__________________
'01 ETH/SO VP.
[HOLLAND COURT DIESEL PERFORMANCE. COALTRAIN IS THE SH$T

01-28-2006, 06:39 PM

IMHO it really is in a bad location and should be cleaned every 10K

***Cepp*** · 01-30-2006, 08:44 PM

if its dirty... what symptoms? poor mileage, rough idle?

TRAMPLINEMAN · 01-30-2006, 11:01 PM

On my 97, is the IAT just to the rear of the air horn in the vertical position with two wires coming out of it? Thanks, Mike

TRAMPLINEMAN · 01-30-2006, 11:25 PM

Ok, I did some more digging and found the 12V motor diagram I couldn't find earlier. Rub out my last post, I found where the IAT is on my truck.

Dr. Evil · 02-06-2006, 11:56 PM

There is no IAT sensor on a 12V...actually, there is one but due to its location I dont believe it has to be cleaned like a 24V's IAT sensor.

dusty218 · 03-12-2006, 07:23 PM

What is the best thing to clean it with? Like carb and choke cleaner

__________________
six speed,4x4, quad cab,4" exhaust,silencer ring MIA,Auto meter ultra light gauges,pyro,boost,fuel press,edge comp, amsoil 4510 intake,south bend ofe, 95gph fass, rv275

03-12-2006, 08:03 PM

Carb cleaner is what I have always used:thumbsup

PULN PWR · 03-12-2006, 09:05 PM

Where is the IAT on a 2003-2004? I have a sensor right in the airbox(now AFE). I'd think that is the IAT.

Chad

01-08-2006, 08:57 AM	#1 (permalink)
Guest Posts: n/a	IAT Sensor - Cleaning Tech Article thanks to Fritz The IAT sensor measures the temperature of the intake nmanifold. The ECM uses this sensor reading to set injection timing and adjust the air-fuel ratio. If the fuel mileage and power output of you engine seem low, some owners have found improvement in EGT, fuel economy, and power after cleaning carbon from the IAT sensor in at the rear of the intage manifold. Engine with exhaust brakes are particularly prone to IAT sensor fouling because soot is blown back into the intake during valve overlap. Last edited by Andy : 03-24-2007 at 02:45 PM.

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01-08-2006, 09:44 AM	#2 (permalink)
Jakey's'01H.O. Diesel Head Join Date: Jan 2006 Location: Gillette WY Posts: 1,994 Thanks: 0 Thanked 2 Times in 2 Posts Jakey's'01H.O.'s Truck Pics	i cleaned mine a few K miles ago, and it was black...but my sender is 'stuck' to one side of the cage..i never checked the voltage, but think it's alright? My mileage isnt totally bad either...and w/o an exhaust brake, how often are you guys cleaning the thing??? __________________ '01 ETH/SO VP. [HOLLAND COURT DIESEL PERFORMANCE. COALTRAIN IS THE SH$T

01-08-2006, 09:47 AM	#3 (permalink)
Guest Posts: n/a	I run an exhaust brake so I clean mine every 10k, its amazing how much smother the truck idles at when clean, I think this also helps MPG

01-28-2006, 06:34 PM	#4 (permalink)
Jakey's'01H.O. Diesel Head Join Date: Jan 2006 Location: Gillette WY Posts: 1,994 Thanks: 0 Thanked 2 Times in 2 Posts Jakey's'01H.O.'s Truck Pics	Just pulled my iat sensor out again, and its black, and kinda wet....????? Definitely Not dry. drove it maybe 45 minutes ago??? what is the deal????? __________________ '01 ETH/SO VP. [HOLLAND COURT DIESEL PERFORMANCE. COALTRAIN IS THE SH$T

01-28-2006, 06:39 PM	#5 (permalink)
Guest Posts: n/a	IMHO it really is in a bad location and should be cleaned every 10K

01-30-2006, 08:44 PM	#6 (permalink)
*Cepp* Diesel Freak Join Date: Nov 2005 Location: Lancaster, OH Posts: 843 Thanks: 0 Thanked 0 Times in 0 Posts Cepp's Truck Pics	if its dirty... what symptoms? poor mileage, rough idle?

01-30-2006, 11:01 PM	#7 (permalink)
TRAMPLINEMAN Cummins Fanatic Join Date: Dec 2005 Location: denmark Posts: 181 Thanks: 0 Thanked 0 Times in 0 Posts TRAMPLINEMAN's Truck Pics	On my 97, is the IAT just to the rear of the air horn in the vertical position with two wires coming out of it? Thanks, Mike

01-30-2006, 11:25 PM	#8 (permalink)
TRAMPLINEMAN Cummins Fanatic Join Date: Dec 2005 Location: denmark Posts: 181 Thanks: 0 Thanked 0 Times in 0 Posts TRAMPLINEMAN's Truck Pics	Ok, I did some more digging and found the 12V motor diagram I couldn't find earlier. Rub out my last post, I found where the IAT is on my truck.

02-06-2006, 11:56 PM	#9 (permalink)
Dr. Evil Banned Join Date: Jan 2006 Posts: 2,557 Thanks: 0 Thanked 1 Time in 1 Post Dr. Evil's Truck Pics	There is no IAT sensor on a 12V...actually, there is one but due to its location I dont believe it has to be cleaned like a 24V's IAT sensor.

03-12-2006, 07:23 PM	#10 (permalink)
dusty218 Cummins Enthusiast Join Date: Jan 2006 Location: St. Louis Mo Posts: 202 Thanks: 0 Thanked 0 Times in 0 Posts dusty218's Truck Pics	What is the best thing to clean it with? Like carb and choke cleaner __________________ six speed,4x4, quad cab,4" exhaust,silencer ring MIA,Auto meter ultra light gauges,pyro,boost,fuel press,edge comp, amsoil 4510 intake,south bend ofe, 95gph fass, rv275

03-12-2006, 08:03 PM	#11 (permalink)
Guest Posts: n/a	Carb cleaner is what I have always used:thumbsup

03-12-2006, 09:05 PM	#12 (permalink)
PULN PWR OCD over the Cummins Join Date: Jan 2006 Location: Canada.... 'ISH' Posts: 842 Thanks: 0 Thanked 0 Times in 0 Posts PULN PWR's Truck Pics	Where is the IAT on a 2003-2004? I have a sensor right in the airbox(now AFE). I'd think that is the IAT. Chad