P00087 limp (low fuel rail pressure) mod? - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
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Old 07-22-2012, 07:43 PM   #1 (permalink)
mark rinker
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P00087 limp (low fuel rail pressure) mod?

Wondering if anyone has a stock or tow tune for a bone stock 2009 that is setting P00087 codes during heavy towing, hills, hot days.

My last truck, a 2006 LBZ had the same issue at about 125K miles and it continued until injector tip failure at about 155k.

The general concensus is this is caused by hot fuel, and high mile injectors that can't hold pressure and are returning too much fuel.

Any assistance greatly appreciated, I am growing tired of resetting this code multiple times daily while towing 14K# in the mountains this summer.
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Old 07-22-2012, 08:32 PM   #2 (permalink)
D_R_C
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Yes, there has been some with this issue stock with higher mileage.
You might start with checking the "Fuel Injector Balance Rates", that should rule out injectors, maybe.
It could be a # of things fuel filter, fuel lines collapsing, weak fuel supply.
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Old 07-24-2012, 10:19 AM   #3 (permalink)
mark rinker
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I am certain that it IS injectors. High gallons...truck is towed 95% of the time so probably has 200K mile equivalent gallons to most mixed use trucks. Also only happens when towing (avg load 14K#, hot, hills)

I am looking to programatically work around the P00087 code. Anyone interested in some custom tuning? I have lots of data, and my 60000 miles per year makes me a good test mule for getting the right solution.

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Old 07-24-2012, 01:00 PM   #4 (permalink)
jay p
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Mark

It looks like it's possible to program the limp mode out with EFILive. There is a torque limiting table that reduces the allowed torque above 2000 rpms in limp mode (on my LBZ). I don't know how safe or good this would be, but it would stop you from having to clear codes all the time. You would still get the CEL and codes, but it should stop the loss of power. I have not tried this yet, so far I don't have a problem.

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Old 08-31-2012, 10:02 PM   #5 (permalink)
Ron Nielson
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Mark

Any progress on the programming/tuning front? If tuning is an answer, even something to get high-mile injectors and pumps by for another 6 months or year, that would be a great thing.
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Old 09-11-2012, 12:55 PM   #6 (permalink)
Blackcloud556
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have you ran balance rates to see how your injectors are doin?
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Old 03-09-2013, 04:55 PM   #7 (permalink)
NIB
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Fuel filter?
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Old 03-09-2013, 06:49 PM   #8 (permalink)
heymccall
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Every p0087 here has been a fuel supply issue, even on the 250k mile trucks. Disabling the p0087 doesn't solve the problem. Fixing the fuel supply does.

Just had a '09 w/ 120k miles thru here. It kept throwing P0101s and limping. It was ether the turbo inlet clamp too loose or a torn/ half missing O-ring in the driver's PCV connection.

This very same LMM has had P0087 issues in the past.
Issue one...sucking air at the filter head primer due to faulty assembly from the factory
Issue two...Plastic Wix filter would not seal completely
Issue three...fuel line would collapse under load, right near the master cylinder

All of it's P0087s were only when towing thru the mountains of PA in the summer.

Obviously, you're sure it's a P0087, right?

If you're out of warranty, just mask the problem with a lift pump.
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Old 03-18-2013, 05:22 PM   #9 (permalink)
slt7676gmc08
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Quote:
Originally Posted by heymccall View Post
Every p0087 here has been a fuel supply issue, even on the 250k mile trucks. Disabling the p0087 doesn't solve the problem. Fixing the fuel supply does.

Just had a '09 w/ 120k miles thru here. It kept throwing P0101s and limping. It was ether the turbo inlet clamp too loose or a torn/ half missing O-ring in the driver's PCV connection.

This very same LMM has had P0087 issues in the past.
Issue one...sucking air at the filter head primer due to faulty assembly from the factory
Issue two...Plastic Wix filter would not seal completely
Issue three...fuel line would collapse under load, right near the master cylinder

All of it's P0087s were only when towing thru the mountains of PA in the summer.





Obviously, you're sure it's a P0087, right?

If you're out of warranty, just mask the problem with a lift pump.
Not to high jack thread but I get the same thing and I have put in a race plug, AD165, Deleted the factory fuel filter/head,replaced all soft lines"origanally no signs of collapsing"and it does it when its cold. im at a loss. Weak cp3 ? Weak Injectors? I need to get it fixed--twins are on the way! Any ideas??
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