idle aggrivation!!!
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Senior User
Joined: Jan 2011
Posts: 217
Likes: 1
From: Piney Flats
idle aggrivation!!!
having a little trouble with the idle of my truck it runs fine and it starts fine its just the idle of it.. when the truck is dead cold it idles like it should but as soon as it warms up it runs sorta roughly and idles up and down bout 200 or so rpm up then back down kinda like when the ac or somethin does when it kicks on only it does this with nothing on at all anyone else had this problem icp was cleaned not long ago and re sealed thinking maybe icp but it doesnt have any oil in it im stumped
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
I'm sure you meant clean and resealed the IPR, have you tried unplugging the ICP sensor and seeing if that resolves the issue? I know you said no oil in the connector, but it would help eliminate it.
Elder User
Joined: Jun 2007
Posts: 705
Likes: 1
From: Sandia Park, NM
In the live data tab select IPR duty cycle and psi. Mine does this too but a new ICP, harness, and IPR did not correct it.
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Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Use that AE to check the Engine Oil Temp Output to check if the EOT sensor is any good.
Here's a cut and paste of something I just posted earlier today.
A very important sensor is the EOT (Engine Oil Temp).
I has to work properly for the PCM to accurately adjust SOI (Start of Injection) and fueling.
Select Engine Oil Temp Output on AE. Check before you start the engine and after the vehicle has completly cooled down. Compare it to AIT
(Air Inake Temp). The readings should be very close if both sensors are working properly, and should closely equal underhood temp. Go for a test drive. EOT should slowy rise. At full operating temp EOT should be around 200° give or take 5°. These are my temps on a temperate day, not extremely hot or cold and a 195° t-stat.
LINK to my earlier post
Here's a cut and paste of something I just posted earlier today.
A very important sensor is the EOT (Engine Oil Temp).
I has to work properly for the PCM to accurately adjust SOI (Start of Injection) and fueling.
Select Engine Oil Temp Output on AE. Check before you start the engine and after the vehicle has completly cooled down. Compare it to AIT
(Air Inake Temp). The readings should be very close if both sensors are working properly, and should closely equal underhood temp. Go for a test drive. EOT should slowy rise. At full operating temp EOT should be around 200° give or take 5°. These are my temps on a temperate day, not extremely hot or cold and a 195° t-stat.
LINK to my earlier post
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Elder User
Joined: Jun 2007
Posts: 705
Likes: 1
From: Sandia Park, NM
Use that AE to check the Engine Oil Temp Output to check if the EOT sensor is any good.
Here's a cut and paste of something I just posted earlier today.
A very important sensor is the EOT (Engine Oil Temp).
I has to work properly for the PCM to accurately adjust SOI (Start of Injection) and fueling.
Select Engine Oil Temp Output on AE. Check before you start the engine and after the vehicle has completly cooled down. Compare it to AIT
(Air Inake Temp). The readings should be very close if both sensors are working properly, and should closely equal underhood temp. Go for a test drive. EOT should slowy rise. At full operating temp EOT should be around 200° give or take 5°. These are my temps on a temperate day, not extremely hot or cold and a 195° t-stat.
LINK to my earlier post
Here's a cut and paste of something I just posted earlier today.
A very important sensor is the EOT (Engine Oil Temp).
I has to work properly for the PCM to accurately adjust SOI (Start of Injection) and fueling.
Select Engine Oil Temp Output on AE. Check before you start the engine and after the vehicle has completly cooled down. Compare it to AIT
(Air Inake Temp). The readings should be very close if both sensors are working properly, and should closely equal underhood temp. Go for a test drive. EOT should slowy rise. At full operating temp EOT should be around 200° give or take 5°. These are my temps on a temperate day, not extremely hot or cold and a 195° t-stat.
LINK to my earlier post
Thread Starter
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Senior User
Joined: Jan 2011
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From: Piney Flats
could that sensor being bad also make my truck high idle in cold weather even after truck has came to operating temps... cause sometimes in cold weather i will sit and let it run a while after driving a good distance on the interstate or washing the truck in the cold with it running and it will start to high idle like its dead cold but i kinda like that lol
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
could that sensor being bad also make my truck high idle in cold weather even after truck has came to operating temps... cause sometimes in cold weather i will sit and let it run a while after driving a good distance on the interstate or washing the truck in the cold with it running and it will start to high idle like its dead cold but i kinda like that lol
Oil temp plays a role in many decisions the PCM makes.
Post Fiend
Joined: Nov 2007
Posts: 9,549
Likes: 14
From: Payson, AZ
Keep in mind oil wll drain from the reservoir when you remove the sensor.
Either evacuate the reservoir or work damn fast.
Thread Starter
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Senior User
Joined: Jan 2011
Posts: 217
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From: Piney Flats
lol yes ill have the ole oil sucker handy to get the oil out with i dont think im fast enough to get it in there without losing a bunch and making a mess what sensor is on the top of the reservoir is that engine oil preasure
Laughing Gas
Joined: Feb 2004
Posts: 1,080
Likes: 1
From: Elsinboro, NJ
Must be something in the air. Mine just started this Saturday night. While warmed up I'm seeing 2100 psi and up to 44% duty cycle while cranking. Idle straightens itself out but only gives me attitude during cranking and idle when warm.