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cp4 bypass issue

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Old Sep 21, 2021 | 12:05 PM
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JJaetzold
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cp4 bypass issue

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2014 F250 Deleted and tuned, Has been running great for 60K miles on tune. Decided to have cp4 bypass installed. The Mechanic used XDP kit. After install truck runs fine as long as you baby it. Stomp it and it throws P0087 low pressure at rail. Changed the filters, and also change the low pressure pump on the frame. Same result. Any suggestions?
 
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Old Sep 21, 2021 | 01:26 PM
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Originally Posted by JJaetzold
First post...
2014 F250 Deleted and tuned, Has been running great for 60K miles on tune. Decided to have cp4 bypass installed. The Mechanic used XDP kit. After install truck runs fine as long as you baby it. Stomp it and it throws P0087 low pressure at rail. Changed the filters, and also change the low pressure pump on the frame. Same result. Any suggestions?
I would do it the EZ way………go back to the guy that did the install. Let him finish what he got paid for.
 
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Old Sep 21, 2021 | 06:27 PM
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Originally Posted by Desert Don
I would do it the EZ way………go back to the guy that did the install. Let him finish what he got paid for.
that’s what I did today.
 

Last edited by Y2KW57; Sep 21, 2021 at 11:03 PM. Reason: corrected anomalous vb code error that software filter interpreted as spam, then approved post
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Old Sep 25, 2021 | 03:59 PM
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Check the oil ring under the actual bypass manifold




the large one in the middle sometimes does not go in correctly and results in air being sucked in.





the oring with the star plastic holder does not have air being sucked in problems.

 
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