Duramax Diesels Forum Truck of the Week
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Old 06-29-2018, 10:52 PM
tony1224 tony1224 is offline
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Default 2008 Duramax fuel problem code p0087

Hello everybody.I'm new here and I really need help don't know what to do anymore.I have the 2008 Duramax with about 120 something miles on.the other day I had the code p0087. I did change the fuel filter and didn't get better.I did change the fuel rail plug,the truck running a little better to about 55 mile and hour as soon you try to do 60 the quit and I have to get off and pry fuel filter 'once it gets pressure runs again for a wile and them quit and on and so on all over again .Can some help please.
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Old 06-29-2018, 11:52 PM
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Default 2008 Duramax fuel problem code p0087

Could be either you are drawing air into the fuel system from somewhere causing you to lose prime or your cp3 pump is getting weak. Also itís not uncommon for the rubber fuel lines to start deteriorating over time or for the fuel filter head to start causing grief requiring a rebuild.

Do a search here for P0087. Lots of reading to be done which might give you some ideas on what to check and how.
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Old 06-29-2018, 11:58 PM
tony1224 tony1224 is offline
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thank you for the reply.I have been reading a few post thanks
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Old 06-30-2018, 12:00 AM
tony1224 tony1224 is offline
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Thank you for the reply.I have been searching on the site a doing some reading.thanks
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Old 06-30-2018, 04:41 AM
Blackmax123 Blackmax123 is offline
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Check the fuel lines by the drivers side head where they connect to the plumbed engine tubes and make sure the flexible lines at the end aren't kinked shut.
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Old 06-30-2018, 05:48 AM
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P0087 is the hardest code on a duramax to diagnose. Lately for us it has been injectors almost every time. First step is checking vacuum at test port.
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Old 06-30-2018, 12:48 PM
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My 2008 LMM would act weird and throw that code on a hill when it was sucking air by the fuel filter 0-ring. It would not leak to make a puddle or smell but at high draw it would suck air at that 0-ring. Make sure you dont have a small nick in the o-ring and the sensor on the bottom is sealed as well, another o-ring.
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