IAT-intake air temp - F-Series & SuperDuty Diesel Forums

dialedin86 · 11-22-2011, 01:44 PM

I started my truck (95 F350 7.3 powerstroke) the other day and all was normal, then it acted like air in the fuel system, very rough idle, then normal but when went to drive it, it had no power or low rpm's and check engine light flashed.
I parked it as I was working on something else, the next morning I go to start it and it is hard starting and when it does coulds of white smoke.
idles normal and then the rough idle comes back. my edge programer gave a code of P1111 and stated "Intake air temp sensor intermitent/high volume"
any thoughts ? is this most likely the sensor or something else.
It acts like the rocker cover harness is bad and runs as if in safe mode (4 cyl?)

DaveBen · 11-22-2011, 02:45 PM

What engine are you having this problem with??

Dave

dialedin86 · 11-22-2011, 03:48 PM

It's a 95 F350 crewcab 7.3 powerstroke.
thanks

BIG JOE · 11-22-2011, 04:22 PM

Quote:

Originally Posted by dialedin86

I started my truck (95 F350 7.3 powerstroke) the other day and all was normal, then it acted like air in the fuel system, very rough idle, then normal but when went to drive it, it had no power or low rpm's and check engine light flashed.
I parked it as I was working on something else, the next morning I go to start it and it is hard starting and when it does coulds of white smoke.
idles normal and then the rough idle comes back. my edge programer gave a code of P1111 and stated "Intake air temp sensor intermitent/high volume"
any thoughts ? is this most likely the sensor or something else.
It acts like the rocker cover harness is bad and runs as if in safe mode (4 cyl?)

What was the outside temp ? Had it been sitting a while ? Did it ever clear up and run right ?

Patrick Feeley · 11-23-2011, 11:09 AM

P1111 is the system pass code (so there should be no issues there). I don't know why it would mention the IAT with that code??? The IAT codes are 0112 for IAT input low and 0113 for IAT input high. I would bet that you have a problem in the injector wiring (UVCHs, valvecover gaskets, external harness connections). If any of the connections, internal or external have burned/melted, replace the valvecover gasket too. Cheers!

dialedin86 · 11-24-2011, 12:51 AM

Thanks for the input. I thought it would be the rocker cover gasket/harness. I will check it tomorrow.
Happy Turkey Day!

dialedin86 · 11-26-2011, 11:12 PM

Like I thought and some of you said the same thing. The valve cover harness burnt.
thanks

11-22-2011, 01:44 PM	#1
dialedin86 dialedin86 Join Date: Jan 2007 Location: Auburn, CA Posts: 15 Thanks: 1 Thanked 0 Times in 0 Posts	IAT-intake air temp I started my truck (95 F350 7.3 powerstroke) the other day and all was normal, then it acted like air in the fuel system, very rough idle, then normal but when went to drive it, it had no power or low rpm's and check engine light flashed. I parked it as I was working on something else, the next morning I go to start it and it is hard starting and when it does coulds of white smoke. idles normal and then the rough idle comes back. my edge programer gave a code of P1111 and stated "Intake air temp sensor intermitent/high volume" any thoughts ? is this most likely the sensor or something else. It acts like the rocker cover harness is bad and runs as if in safe mode (4 cyl?) Last edited by dialedin86; 11-22-2011 at 03:52 PM. Reason: added truck year and engine

11-22-2011, 02:45 PM	#2
DaveBen SDD Senior Member Join Date: May 2005 Location: Ukiah, California Posts: 7,869 Thanks: 127 Thanked 506 Times in 489 Posts	What engine are you having this problem with?? Dave __________________ 2004 F-350 Regular cab with 6.0, Torqshift, 4X4, and just about all of the rest of the options. I added Guages, Satellite Radio, Air Horns, and a coolant filter. Bilstein shocks. Battery Desulphater that really works. Installed Jimmi Jammers. Pictures here: http://community.webshots.com/user/dbennett48 Completely Stock. I had a Detroit Diesel 8V92TA in a KW dump truck in 1980. That sucker would put out 425 hp but would never out pull a CAT.

11-22-2011, 03:48 PM	#3
dialedin86 dialedin86 Join Date: Jan 2007 Location: Auburn, CA Posts: 15 Thanks: 1 Thanked 0 Times in 0 Posts	It's a 95 F350 crewcab 7.3 powerstroke. thanks Last edited by dialedin86; 11-22-2011 at 03:52 PM.

11-23-2011, 11:09 AM	#5
Patrick Feeley SDD Member Join Date: Apr 2005 Location: Tehachapi, CA Posts: 346 Thanks: 0 Thanked 19 Times in 19 Posts	P1111 is the system pass code (so there should be no issues there). I don't know why it would mention the IAT with that code??? The IAT codes are 0112 for IAT input low and 0113 for IAT input high. I would bet that you have a problem in the injector wiring (UVCHs, valvecover gaskets, external harness connections). If any of the connections, internal or external have burned/melted, replace the valvecover gasket too. Cheers! __________________ 1997 F250 SC 4x4 (CA model), E4OD, 4.10 LS, Relocated Block Heater Plug, Mostly Stock SOLD - 1994 F350 CC DRW 2WD, 5 Speed, SBC Con-O, Baldwin Filter, Tymar HPX Hose, DPPI DP, Bilsteins, $12 AIC, Coolant Filter, Explorer Overhead Console, A-Pillar w/ISSPRO Black Ice, EV Boost, and EV Pyro, Modified Pedestal, Gutted EBPV.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

11-24-2011, 12:51 AM	#6
dialedin86 dialedin86 Join Date: Jan 2007 Location: Auburn, CA Posts: 15 Thanks: 1 Thanked 0 Times in 0 Posts	Thanks for the input. I thought it would be the rocker cover gasket/harness. I will check it tomorrow. Happy Turkey Day!

11-26-2011, 11:12 PM	#7
dialedin86 dialedin86 Join Date: Jan 2007 Location: Auburn, CA Posts: 15 Thanks: 1 Thanked 0 Times in 0 Posts	Like I thought and some of you said the same thing. The valve cover harness burnt. thanks