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  #1  
Old 02-01-2011, 09:13 PM
kevinrea kevinrea is offline
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97 F250-7.3 litre..check engine light

hi guys,
so, my check engine light is on for about a month now.
i took it over to a mechanic and he scanned it and it came back with
P1284 code.., he cleared it twice and it still came back.
we looked it up.., but we were not sure if it could just be caused by the pcm having a chip installed on it ?

any ideas ?

thanks,
Kevin Rea
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  #2  
Old 02-01-2011, 09:24 PM
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Quote:
Originally Posted by kevinrea View Post
hi guys,
so, my check engine light is on for about a month now.
i took it over to a mechanic and he scanned it and it came back with
P1284 code.., he cleared it twice and it still came back.
we looked it up.., but we were not sure if it could just be caused by the pcm having a chip installed on it ?

any ideas ?

thanks,
Kevin Rea
May want to see if the ICP sensor is seeping oil ..
Quote:
Z21 DIAGNOSTIC TROUBLE CODE (DTC) P1284
DTC P1284 indicates that a ICP circuit failure was present while trying to perform KOER Cylinder Contribution Self Test.
Perform KOEO On-Demand Self Test.
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  #3  
Old 02-01-2011, 11:11 PM
kevinrea kevinrea is offline
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what do you mean seeping oil ?
and, where is the icp sensor ?

thanks,
kevin
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  #4  
Old 02-02-2011, 06:08 AM
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He means to unplug the icp and see if there is any oil in the connection. Here's a pic for you Kevin

Click the image to open in full size.
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Old 02-02-2011, 02:04 PM
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ok.. thanks !

kevin
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  #6  
Old 02-02-2011, 02:42 PM
kevinrea kevinrea is offline
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thanks guys !!

I think I found it..
When I went to look at and pull the connection on the ICP, it was broken off, that is the top part of the icp was broken off.. so , I ordered another one.. we'll see if that fixes it.
I might have laid the new ac compressor on top of it when I was changing it., that might have broken it.

Thanks very much guys !!!

kevin
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  #7  
Old 02-04-2011, 10:24 PM
kevinrea kevinrea is offline
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What are the results of ICP Sensor disconnected ?

hey guys,
so, what can happen, that is, what systems or gas mileage or what ever could be affected if the ICP sensor is not connected ?

I noticed that onthe last trip my gas mileage was crap.. about 9 mpg instead of about 21.

thanks,
Kevin
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  #8  
Old 02-05-2011, 05:51 AM
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I'll try this one...other's will correct me if wrong. Disconnecting the ICP will tell the PCM to default idle rpms...It should start and idle....but that should be all it will do...Anyone else? Am I close?
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Old 02-05-2011, 06:08 AM
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Shooter, I think the pcm will go to default like you mentioned but it will run, just not ideal as the pcm is just guessing what to do as it reads the icp, then passes the info to the ipr.
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Old 02-05-2011, 08:16 AM
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So the PCM must be sensing the Pedal Position and just giving a WAG as to what the IPR should be at? I would think that would be a very unresponsive Powerstroke, with limited power....just wondering.
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Old 02-05-2011, 08:16 AM
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Quote:
Originally Posted by kevinrea View Post
hi guys,
so, my check engine light is on for about a month now.
i took it over to a mechanic and he scanned it and it came back with
P1284 code.., he cleared it twice and it still came back.
we looked it up.., but we were not sure if it could just be caused by the pcm having a chip installed on it ?

any ideas ?

thanks,
Kevin Rea
Kevin, if you add a signature explaining your truck you won't have to write it each time and helps others help you.
year, model, miles,mods and so on
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  #12  
Old 02-05-2011, 12:24 PM
kevinrea kevinrea is offline
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what my truck has been doing without the icp connected

Hi guys,
well my truck has had its check engine light on for over a month now., which means that my icp has been disconnected.
there is no power loss or wierd running what so ever.., it just gets really bad gas mileage.


on the part of the signature for my posts.. i have had a signature on in my cpanel, but it does not come in.... is there some way to include it in my posts ?
it looks like this.
Kevin
Click the image to open in full size.
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  #13  
Old 02-05-2011, 03:20 PM
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hmmm there should be a box somewhere to include it in every post

Maybe someone else can show you/us
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Old 02-05-2011, 09:39 PM
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From what I understand the motor will run with the ICP unplugged but will not run if the IPR is unglugged. Correct me if I'm wrong.
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  #15  
Old 02-06-2011, 06:35 AM
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you are right it will default with the icp disconnected but wont run with the ipr disconnected cause there is nothing to control the high pressure oil flow to the injectors
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Old 02-06-2011, 06:35 AM
 
 
 
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