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Old 07-28-2013, 08:55 AM
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IPR ohms

Initially was suppose to do an EGR delete on a friends 2003 6.0. He just got the truck 2 days ago it ran fine. He went to crank it yesterday to bring it over and it wouldnt start. Had it towed over and plugged in my scanner and see the ICP is only getting to 175psi. I shoud have checked icp,ipr voltage but i didnt.

First thoughts are ICP sensor or IPR. I know the 03's are common for ICP sensors going out so i pulled it first-there was oil in the plug so i will replace the icp and harness. I jumped the gun a little and ment to just unplug the icp and try to crank but i got ahead of myself and pulled the IPR also.

The screen on the IPR was clean and no holes. I checked ohms on the IPR and its bouncing all over..0..25...15..28..5 ect. I read that it should read about 6ohms correct? I then applied 12v to the plug to see if i could hear it click but i heard nothing. Should i noticeably be able to hear the ipr clicking with 12v applied?

As of now my thoughts are IPR is bad causing the no start, the ICP was working but i will replace it with a new one due to the oil leaking.

What are your thoughts? I was going to pressurize the system using the ICP port to check for leaks but i dont believe the IPR is working.

Thanks
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Old 07-28-2013, 09:01 PM
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Quote:
Should i noticeably be able to hear the ipr clicking with 12v applied?
No. It may only click if the IPR is open and on the first (and maybe the second) time you close the solenoid valve. It doesn't move very much, but it does use HP oil to move the plunger to the open position. This is why you need a good bench test process, or it is better to do it with air while in the vehicle. It won't give partial readings, but at 100 psi you know if it is open or closed.

I will check the ohms tomorrow on a couple I have sitting around.

Last edited by twoicebergs; 07-29-2013 at 08:11 AM. Reason: close
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Old 07-29-2013, 03:36 AM
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thanks for the reply! Let me know about the ohms.
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Old 07-29-2013, 06:21 AM
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6 Ohms from 2 different IPRs, with no variance. It sounds like the IPR coil, or your tester is defective.
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Old 07-29-2013, 06:53 AM
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thanks! ill double check with another tester to be sure.
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Old 07-31-2013, 01:53 PM
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New IPR and ICP installed, she fired right up....now onto the egr delete.
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