I've been chasing issues on my fuel system for ages, and I feel like an absolute idiot because I am a gm diesel tech and sence my truck never threw a p0087 code I never found that buliten. I've replaced my cp3 fuel filter housing all soft lines including the line by the transmission and never thought to look here but this fix got me one step closer my final issue is my fuel pressure relief valve. And hopefully she will be running I'm been running around like a chicken with its head cut off and this got me one step closer.
I have a 2002 single cab dually LB7 ZF6 4×4 . I have 430,000 miles. I've replaced injectors, alternator, water pump and head gaskets with studs. I just spent $2,000 for a new dual disc clutch. 6 months ago almost 3,000 on a completely new kryptonite front end. Still much cheaper than a new truck.
Mines an 02 with 288k on it. I live in Fl and it gets hot. Mine was throwing the p0087 occasionally when it was hot and I had just run steady around 70-75mph and would stop at a light or such. On take off it would throw the code and limp. It started happening more and more frequently so I had to find it. Unfortunately for me it was the CP3 pump. A couple days and a lot of labor later ( and $$$) and it hasn’t done it since. Now, with this info I’ll know where to look should it do it again in the future. Appreciate it.
Incredible, been chasing this issues forever. Just ordered injectors and a delete kit. Now I have to do this while I’m doing it so my wife doesn’t find out! 🤣☠️🤘🏽
Man I gotta say, you always have great information. I do look forward to seeing your videos because I know it’s gonna be something worth watching. Thanks for trying to help the rest of us out, I know I appreciate it and I’m sure others do as well.
Everything you said and did is really good info , very much appreciated, if you want to go one step further , install fuel tank sump and lift pump and new quality hose to actually pressurize the supply line , and clean your cooler and with filtration from lift pump system you can eliminate the factory filter
Dude, good call. I did do the ported fitting a while back, I still have one for the passenger rail, but it's a lot more work to do that one. I've read you don't get much doing the passenger side, so I haven't tackled it. The throttle response was the most noticeable for me.
Thanks for the info, my 06 LBZ just did this to me in the heat pulling my 34ft RV through the mountains in Central WA. It's only got 245k miles on it and I was worried it was my injector pump or injectors but I'll definitely look at the lines before I take it to a mechanic...I can't wait for your update after your last load to see if it was indeed your issue. Great work man.
A couple days after that video, my truck wouldn't start one morning. I had a bad fuel filter housing that was loosing prime. That can also cause a P0087. Since the fuel line and the filter housing I have not had a single code. Hope that helps buddy.
@@heldtheflashlightfordad6728 how is the hose still holding up ? I’m actually in my driveway now and noticed it said not rated for fuel injection systems. Any problems ?
I installed a race plug, lift pump setup, extra fuel cooler with a fan, cooler on the front, and a fan on the factory cooler, thinking it would help keep fuel cooler and keep viscosity up, seemed ok til the other day, still doing it geezz what s pain, only 445k miles too
Yours is just broken in😎. I've done a ton of research since this video and have found that these injectors are really only good for about 160-200k max. After that, they start returning too much fuel. I just recently bit the bullet and installed new injectors.
Thanks for the info going to check my 06 LBZ mine was doing the same through the mts of Tennessee back to Michigan but mine turned out to be the pcm..replaced but definitely checking that line thanks..anything that helps 👍
I have an '07 Duramax Van. I've been going through hell trying to figure out my fueling problem. I looked inside the dog house and it was right in front of my eyes the whole time totally kinked. I will change it out next weekend. Everything else is new and I mean everything sadly.
Wow , i changed the CP3, and added a fass system, and turbo, i shoulda checked this video out but maybe it was time since my truck is at 370k miles hehe
Thanks mine is an 08 GMC I want to make sure this issue is resolved before I delete and tune like yours. Kinda bummed my truck only has 104k now. Your video has really helped me to zero in on the possible causes. Thanks again
FASS or Air Dog lift pump, I know there pricy. I've put a FASS 165 GPH, I've been told a lift pump is a must for a duramax to save your MP3 pump. That way your fuel is pressurized from you tank to your pump. And have a built in water separator filter a long with a regular fuel filter, and people have remove the 3rd filter at the block to save on the cost of that filter.
I've got a LMM myself, I've HSP pipes on everything except the the cold side up pipe, Y bridge. So my egr system is still intact, I want to delete it but I'm reluctant to do so.
@Charles Swearengin Mines still all there too. The Y bridge is kind of a pain to get too and once you change the cold side, you almost have to change the Y bridge, or it'll come loose. I'm mostly worried about the egr cooler leaking, but I've got 203,000 miles on it and never had an issue. The LMM's have a better egr cooler than the LBZ's had so that's a plus. I'm gonna leave it all until there's an issue. My truck runs good
I got the hose and clamps, and am planning to change it out this weekend. Is there anything special I’ll need to do before starting the engine with there being no fuel in that new section of hose?
Good question, but no. Your truck will fire right up. I did use a small hack saw on the fitting that goes down next to the motor. It's really tight and I didn't want to nick anything important. Overall real easy modification.
I had the P0087 several times. Changed fuel filters to only last 1K-2.5K miles. Race plug did not solve it either so I put the FRPV back in. I’m thinking the worst! I found the two fuel lines near the transmission twisted; replaced them. The lines near the engine also had a slight kink, I did not replace the yet. Trying to find the quick connect fittings.
May have been a coincidence, but my fuel filter housing went out shorty after I posted this. Truck wouldn't start, so I installed a new housing. I've read that can also cause a P0087. It's a $100 part and takes about 45 minutes to install. Might be worth a try. My truck has been trouble free as of lately. Good luck to you buddy.
@Altruisticgerms one morning, my truck would just crank over and wouldn't start. I opened the hood and pumped the primer on the housing, and the truck fired right up. It's a pretty easy part to replace, and it's pretty common on higher mileage trucks. Mine was at about 190k miles at the time. The part is only about $100.
@@heldtheflashlightfordad6728 If that happens again, buy the o-ring kit for it. Takes about an hour to change them start to finish. The kit is about $20 from XDP Diesel or Merchant Automotive. Merchant also has one of the best prices on Allison spin on transmission filters too.
Mine generally sit between 175 and 190 just cruising old man style. If I'm feeling frisky and let them ponies free I see 200-210 easy. I've gotten it up to 221 this summer pulling a decent load against the wind, had the bed full, entire family and the A/C blasting. She was giving me all she had that day. Lol I do drain and refill the pan every 25k. Fluid is always nice and clean.
I did the job and it started right up but died shortly after the clamps appear to be on tight enough no codes showing and it started right up before I changed the hose any advice on what to check or do?
Crack open the bleeder screw on top of your fuel filter housing, pump the primer until fuel spills out, tighten the bleeder screw and then pump the primer again until it is rock hard. It'll start after that. Be careful not to over tighten the plastic bleeder screw, it is easy to break.
I hate to bother you again just figured I'd ask I'm guessing I have another problem just not sure what it could be I tried what you said but the fuel never spilled out after more then enough pumps At the beginning bubbles came out similar to when you change the fuel filter but diesel never spilled out The housing was replaced about 5000 miles ago and the fuel filter about 800 miles ago
@@omarrodriguez193 I know this is a stupid question, but are you sure there's enough fuel in the tank? I would try to crank the engine for 5 seconds or so and then pump the primer again. If the truck was running before you changed those lines then she should fire back up.
According to the fuel gage when I turn the key to the on position,there's a little under a quarter My only guess is maybe the fuel housing is faulty because I can pump and pump bur ot won't stiffen up, but that wouldn't explain why it worked before hand and not after
Yes, it's fixed. My truck has not had any more P0087 problems. About 1 week after this video, my truck wouldn't start one morning. It was the fuel filter housing, so I replaced it, and my truck has been good to go.
I've been chasing issues on my fuel system for ages, and I feel like an absolute idiot because I am a gm diesel tech and sence my truck never threw a p0087 code I never found that buliten. I've replaced my cp3 fuel filter housing all soft lines including the line by the transmission and never thought to look here but this fix got me one step closer my final issue is my fuel pressure relief valve. And hopefully she will be running I'm been running around like a chicken with its head cut off and this got me one step closer.
As an LLY owner pushing three hundred thousand miles, this is very helpful information thank you!
I have a 2002 single cab dually LB7 ZF6 4×4 . I have 430,000 miles. I've replaced injectors, alternator, water pump and head gaskets with studs. I just spent $2,000 for a new dual disc clutch. 6 months ago almost 3,000 on a completely new kryptonite front end. Still much cheaper than a new truck.
Mines an 02 with 288k on it. I live in Fl and it gets hot. Mine was throwing the p0087 occasionally when it was hot and I had just run steady around 70-75mph and would stop at a light or such. On take off it would throw the code and limp.
It started happening more and more frequently so I had to find it.
Unfortunately for me it was the CP3 pump.
A couple days and a lot of labor later ( and $$$) and it hasn’t done it since. Now, with this info I’ll know where to look should it do it again in the future.
Appreciate it.
Your Video saved me a ton of hunting, this fix was EXACTLY my issue. Braided line was soft and kinked. Thanks much!!!!
Incredible, been chasing this issues forever. Just ordered injectors and a delete kit. Now I have to do this while I’m doing it so my wife doesn’t find out! 🤣☠️🤘🏽
Man I gotta say, you always have great information. I do look forward to seeing your videos because I know it’s gonna be something worth watching. Thanks for trying to help the rest of us out, I know I appreciate it and I’m sure others do as well.
Thanks man! I'm just trying to save guys like us time and money. Appreciate the support!!
Great video & thanks so much for pointing out these fuel lines that are a posible problem !!
Thanks for watching!
Everything you said and did is really good info , very much appreciated, if you want to go one step further , install fuel tank sump and lift pump and new quality hose to actually pressurize the supply line , and clean your cooler and with filtration from lift pump system you can eliminate the factory filter
Great advice, the lift pump with filtration is a game changer. I'm still working on justifying that upgrade with the wife. 😎
THANK YOU, great video. Thanks for taking the time and giving GREAT detailed info!!!
Hey dont forget about the full rail ported valve. so small and it helped my truck a bunch. thanks dude!!
Dude, good call. I did do the ported fitting a while back, I still have one for the passenger rail, but it's a lot more work to do that one. I've read you don't get much doing the passenger side, so I haven't tackled it. The throttle response was the most noticeable for me.
Thanks for the info, my 06 LBZ just did this to me in the heat pulling my 34ft RV through the mountains in Central WA. It's only got 245k miles on it and I was worried it was my injector pump or injectors but I'll definitely look at the lines before I take it to a mechanic...I can't wait for your update after your last load to see if it was indeed your issue. Great work man.
A couple days after that video, my truck wouldn't start one morning. I had a bad fuel filter housing that was loosing prime. That can also cause a P0087. Since the fuel line and the filter housing I have not had a single code. Hope that helps buddy.
@@heldtheflashlightfordad6728 great, thx
Vantage….
@@heldtheflashlightfordad6728 how is the hose still holding up ? I’m actually in my driveway now and noticed it said not rated for fuel injection systems. Any problems ?
I installed a race plug, lift pump setup, extra fuel cooler with a fan, cooler on the front, and a fan on the factory cooler, thinking it would help keep fuel cooler and keep viscosity up, seemed ok til the other day, still doing it geezz what s pain, only 445k miles too
Yours is just broken in😎. I've done a ton of research since this video and have found that these injectors are really only good for about 160-200k max. After that, they start returning too much fuel. I just recently bit the bullet and installed new injectors.
I feel you on colorado, currently in greeley thinking about goin further north.
Yea, we had to bounce. Cheyenne is not too far from you. there is plenty of work up there 😉
Wow thank you for this information during my recent trip to Durango from the Hot NM weather this exact same thing happened to me.
Similar experience with my 2003. Planning to drive my hobo truck until they take my keys away. 😂
Thanks for the info going to check my 06 LBZ mine was doing the same through the mts of Tennessee back to Michigan but mine turned out to be the pcm..replaced but definitely checking that line thanks..anything that helps 👍
thanks alot , for the info , 2015 6.6duramax ,
I have an '07 Duramax Van. I've been going through hell trying to figure out my fueling problem. I looked inside the dog house and it was right in front of my eyes the whole time totally kinked. I will change it out next weekend. Everything else is new and I mean everything sadly.
Love your videos keep them coming!!
Thanks man, you are awesome!!
Wow , i changed the CP3, and added a fass system, and turbo, i shoulda checked this video out but maybe it was time since my truck is at 370k miles hehe
370K, you were wise to change it all. I bet your truck runs like brand-new now.
Great information brother!
Thank you!
Love it, keep grindin man!
Hell yea buddy! Thanks
Hey brother! What kind of fuel hose did you use?? Great videos btw!
having hell with this problem, gonna give this a try
Weak portion of fuel line was collapsing and pressure relief valve on fuel rail
Great video, keep up the good work, thanks man.
Appreciate the support!
You ever have to mess with the rail pressure sensor ?
Hi is your truck still running good after changing the fuel line and fuel filter housing. Thanks
I have not had any other trouble. I just hauled an old Chevelle from Colorado to Oklahoma a few weeks ago with zero issues.
Thanks mine is an 08 GMC I want to make sure this issue is resolved before I delete and tune like yours. Kinda bummed my truck only has 104k now. Your video has really helped me to zero in on the possible causes. Thanks again
Did you ever fix the issue?
Yes, I have not had this issue anymore.
FASS or Air Dog lift pump, I know there pricy. I've put a FASS 165 GPH, I've been told a lift pump is a must for a duramax to save your MP3 pump. That way your fuel is pressurized from you tank to your pump. And have a built in water separator filter a long with a regular fuel filter, and people have remove the 3rd filter at the block to save on the cost of that filter.
You're spot on. The lift pump is on my list
I've got a LMM myself, I've HSP pipes on everything except the the cold side up pipe, Y bridge. So my egr system is still intact, I want to delete it but I'm reluctant to do so.
@Charles Swearengin Mines still all there too. The Y bridge is kind of a pain to get too and once you change the cold side, you almost have to change the Y bridge, or it'll come loose. I'm mostly worried about the egr cooler leaking, but I've got 203,000 miles on it and never had an issue. The LMM's have a better egr cooler than the LBZ's had so that's a plus. I'm gonna leave it all until there's an issue. My truck runs good
I got the hose and clamps, and am planning to change it out this weekend. Is there anything special I’ll need to do before starting the engine with there being no fuel in that new section of hose?
Good question, but no. Your truck will fire right up. I did use a small hack saw on the fitting that goes down next to the motor. It's really tight and I didn't want to nick anything important. Overall real easy modification.
Thanks I'll check!
I had this issue in my 2002 lb7 with 292k
Salute 💯
I had the P0087 several times. Changed fuel filters to only last 1K-2.5K miles. Race plug did not solve it either so I put the FRPV back in. I’m thinking the worst!
I found the two fuel lines near the transmission twisted; replaced them. The lines near the engine also had a slight kink, I did not replace the yet. Trying to find the quick connect fittings.
May have been a coincidence, but my fuel filter housing went out shorty after I posted this. Truck wouldn't start, so I installed a new housing. I've read that can also cause a P0087. It's a $100 part and takes about 45 minutes to install. Might be worth a try. My truck has been trouble free as of lately. Good luck to you buddy.
@@heldtheflashlightfordad6728how do you know your fuel filter housing went out? Was it leaking or sucking air?
@Altruisticgerms one morning, my truck would just crank over and wouldn't start. I opened the hood and pumped the primer on the housing, and the truck fired right up. It's a pretty easy part to replace, and it's pretty common on higher mileage trucks. Mine was at about 190k miles at the time. The part is only about $100.
@@heldtheflashlightfordad6728
If that happens again, buy the o-ring kit for it. Takes about an hour to change them start to finish. The kit is about $20 from XDP Diesel or Merchant Automotive. Merchant also has one of the best prices on Allison spin on transmission filters too.
What do your trans temp sit at? On a 90* plus day I’ll easily get 200-210 but never over that my trans cooler is clean
Mine generally sit between 175 and 190 just cruising old man style. If I'm feeling frisky and let them ponies free I see 200-210 easy. I've gotten it up to 221 this summer pulling a decent load against the wind, had the bed full, entire family and the A/C blasting. She was giving me all she had that day. Lol
I do drain and refill the pan every 25k. Fluid is always nice and clean.
I did the job and it started right up but died shortly after
the clamps appear to be on tight enough
no codes showing
and it started right up before I changed the hose any advice on what to check or do?
Crack open the bleeder screw on top of your fuel filter housing, pump the primer until fuel spills out, tighten the bleeder screw and then pump the primer again until it is rock hard. It'll start after that. Be careful not to over tighten the plastic bleeder screw, it is easy to break.
@@heldtheflashlightfordad6728 ill try it tomorrow thank you
I hate to bother you again just figured I'd ask
I'm guessing I have another problem just not sure what it could be
I tried what you said but the fuel never spilled out after more then enough pumps
At the beginning bubbles came out similar to when you change the fuel filter but diesel never spilled out
The housing was replaced about 5000 miles ago and the fuel filter about 800 miles ago
@@omarrodriguez193 I know this is a stupid question, but are you sure there's enough fuel in the tank? I would try to crank the engine for 5 seconds or so and then pump the primer again. If the truck was running before you changed those lines then she should fire back up.
According to the fuel gage when I turn the key to the on position,there's a little under a quarter
My only guess is maybe the fuel housing is faulty because I can pump and pump bur ot won't stiffen up, but that wouldn't explain why it worked before hand and not after
I replaced both of them on my lmm
Smart man. Hose and clamps are cheap
What’s your empty mpg?
I only get 13.6 mpg combined city/highway unloaded
@@heldtheflashlightfordad6728 😯
@@BackFortyTV She's a big girl with a big ol booty.
@@heldtheflashlightfordad6728 das righttt! Hopefully going to get mine right now.
Any updates this
I have not seen the code since I did this video.
Still good with this fix? I just went and checked that hose its 30% kinked cold! Son of a bitch!!! Changing it out tomorrow!
Yes, it's fixed. My truck has not had any more P0087 problems. About 1 week after this video, my truck wouldn't start one morning. It was the fuel filter housing, so I replaced it, and my truck has been good to go.
I used 200psi continintal on the 2 from primer. LLy. Old ones looked like was coming apart inside was separated