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Discussion Starter · #1 ·
I need some help on this. It may be nothing but looking for advice. I just got back for vacation pulling a 8000 lb camper(bumper pull) From savannah,ga to severville,tn. On the way up I was in my light tow tune +60 horse and going up a hill long pull egg went to 1300 and it popped a cel. When I looked at it it was the p0087. I then turned the tune down to +30 tow tune. On the way home same thing got would run high and then pop cel. I have installed Kennedy twins, new fuel filter, racor. The onlything I have not changed is the fuel lines from the filter head to the pump. The truck has never ran that much get pulling the same camper.
 

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If you’re running Kennedy’s twin pumps it’s not a fuel hose issue. You have some injectors that are starting to fail under the heavy load. That’s also why the egts are going up.
 
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Discussion Starter · #3 ·
Nick, Thanks for the help. I verified the pumps are working. How do i check this if i can and then i guess you just do a set of them?
 

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Nick, Thanks for the help. I verified the pumps are working. How do i check this if i can and then i guess you just do a set of them?
I’ve heard of people sending them out to be tested but I’m unfamiliar with who does that. Other than that, it’s just replacing them.
 

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Discussion Starter · #6 ·
No sir I have not. Truck is stock except the jack spade.
 

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Check the code to see if it was P0087. If it was, the fix for my stock LBZ was to shim the FPRV and I added an AirDog II 165gph lift pump.
 

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Discussion Starter · #8 ·
That was the code I had and I have Kennedy twins on it.
 

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Discussion Starter · #10 ·
Just looked at how todo it. Better to shim it or get the race plug?
 

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Shimming the valve still allows the valve to operate if the fuel pressure spikes. Race plug sends over-pressured fuel into the fuel rail..,
 

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Discussion Starter · #12 ·
Thank you. I will report back.
 

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I was experiencing this with the 2010 I had. Sold it before ever really fixing. Watching the Edge CTS. My thought was fuel was getting too hot. Code would pop when fuel temp sensor read over 190.
 

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I was experiencing this with the 2010 I had. Sold it before ever really fixing. Watching the Edge CTS. My thought was fuel was getting too hot. Code would pop when fuel temp sensor read over 190.
That’s usually because the injectors are returning too much fuel.
 
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Discussion Starter · #15 ·
Nick I understand your reasoning and if I can buy a year with the shim kit then I may jump on the injectors. I will know if it helps as I am pulling to Unicoi state park in October which is in the mountains.
 
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