This is the link to get entered in for the Duramax Giveaway click here 👉 truckmasterdiesel.com

This is why you leave the relief valve in the fuel rail. Your injectors are most likely fine S&S and DDP use a blue band seal I believe that are rated for about 32k psi. The stock LB7-LLY FRPS is rated for about 26k psi. You are most likely running max rail pressure at idle. I have had this happen many times at the shop. Knowing you are running a dual Pump kit you need make sure you are getting voltage to the FCA. Use a multi meter on the factory FCA harness it works on a 5V reference. The more voltage the less rail pressure. If you are running at full 5V when you prove the FCA plug off the original harness that means the ECM is doing everything it can to bring down rail pressure. If you are only getting .5-1V the ECM is not detecting the high rail pressure which can be a wiring issue to the rail pressure sensor. Your top pump is working off the PPE dual pump box. Those CP3 pump controllers go bad all the time. Make sure your getting voltage out of the box into your second CP3 pump. If all wiring is good make sure all your return fuel lines are Plumbed correctly. If you have a restriction in the return line it will mechanically push the FCA open causing a Max Rail scenario. Rule of thumb on Cummins and Duramax with the Common rail injection system is you always want the return double the size of the feed. You are hearing the knock because the injectors are getting fed way too much fuel for the pulse width that you are commanding at idle. Now here is where the EFI live comes into play. In a file in FCA mA (milliamps) table the more rpm it has the less mA you will see. Usually we like to multiply the entire FCA table by 1.8-2.1 to calm down both pumps at idle. That’s why when you give the pump more voltage it will give the truck less fuel. The less voltage the more fuel it has. Seen this 100 times on a duramax and fought a issue like this for a year on a cummins. The truck sat for a YEAR in my shop. On the Duramax on the older style rail pressure sensors you can flip the plug so it WILL plug in both ways I’ve seen that happen also and it causes max rail. If your lift pump pressure is too high it will also push the FCA wide open just like if you have a blocked off return. That’s why the truck cranked for so long as well because it has no rail pressure reading it was trying to go to max rail and that takes a lot of rpm. I sent you a DM on Instagram I own a shop. I’m 100% willing to help you for free and get you on the road, this is nothing that you can’t fix in your garage.

Holy rail pressure! That’s probably the rattle/knock noise at idle.

Just had my LMM rebuilt three weeks ago. I was told "do not let it idle". Ran it hard for 500 miles and did the first oil change. My bank account is empty now but my truck is back on the road.

“Don’t worry bout the knock thats normal” words to live by

I am watching this video after coming home from a day of failures, my work boots are full of water & going over the painful process of trying to figure out what to do with my recently recovered stolen beat-up F350....and then I see this ray of sunshine to inspire me! although we got the same boots, our rigs are totally different! ahaha looking good buddy, loving the channel.

You'll be very happy with the PPE oil pan! I changed mine and I can't believe how much cleaner the oil stays! Because of the flat bottom surface you can actually drain all the oil out and change all of the oil.

Reduce the pressure on your lift pump, that’ll resolve the issue with rail pressure. My LB7 had that issue with the air dog II 165, dropped (cut)a coil off the pressure spring to get the pressure down. Brought it for 22k psi to 4900 psi

Obviously your checking your cp3 mprop connectors but just in case they are plugged in check to make sure your dual filter box has power I had same one and fuse blew and rail pressure went to 26k just like if it was fca/ mprop was unplugged. Last but not least check your low pressure fuel from the air dog I know they say they are preset but I have had three of them be wrong right out of box. If that big 220 air dog is making more then 12 lbs it will push mprop open and you get high rail pressure. You were maxed out so I’m leaning towards you didnt connect the fca connector on one of them or the dual fueler box is not powered up. You will get it you always do

Hello Josh and Melanie. It's finally time to do the first start of The Wifemax. Can't wait to hear her start.

My man I’m slowly watching all your videos start to finish

Not gonna lie, I'm saying Josh stop doubting yourself. Then I'm saying come on baby start, come on baby let it start; please God let it start. Then I heard it start & said PRAISE GOD!

Dude I remember watching you years ago when you were just starting. Congratulations on the progress man!!

As a lifelong gas auto and newer diesel enthusiast who's done a few engine swaps and rebuilds, hearing your hard work and time fire up the first time and run on its own....hard to put it in words.

My lb7 isnt a built twin turby but i had similar injector knock when the pressure on my air dog was far too high. They told me to cut the spring until i got good frp match dfrp. It worked, as bad as that sounds like doing right after a new purchase. But yea just thought id mention the lb7 doesnt like alot of psi past the pump

My brother if it’s for you your family l love how it sounds your engine, happy for you my brother, God bless you and all your Family! Happy holidays my brother!

It's OK brother ,I saw you were frustrated we all do ,bit don't worry you're a smart dude you'll get done and it will run great I got faith in you 👍

Awesome seeing it run again but 26k idle frp that’s wot pressures it’s probably going to be the fpr on one in the cp3s good luck I know you’ll get it fixed!

a update on the 6.0 please i love them trucks. i like duramax but i love 6.0s more. a 6.0 is the best sounding diesel truck

Been watching this build for a long time Josh, the wifemax is looking great. Hope the fp isn't a major issue/fix but you'll figure it out. Stay positive :)

FRP about 20k high for idle!? I think I see 26K at WOT on my LBZ. Hope you get it dialed in soon. Can't wait to see it back on the street!

It's been awhile and I actually forgot about the shape that truck was in when it all began. It has certainly came a long way. It is a beautiful truck and has been a great journey. This is just a small setback and you will be able to get it taken care of. It's all part of the hot rodding arena. You caught it and acted quickly. Have to say... great cliff hanger... will definitely be looking for the next post on things... good job on that ! But seriously it's a beautiful looking truck. You have done a great job. 😎👍

U are really good diesel mechanic… u smart . Congratulations

You are so talented! Great build. Congrats on the startup. I know you’ll figure it out. Great job!

I could tell as soon as he started it. His comment of the noise was due to oil just needing to get everywhere was incorrect. His fuel rail preasure was at full potential rail preasure. I am not trying to run him down. He is doing a fabulous job on this truck and his other videos. Keep up the good effort.

One day ill learn how to build a truck like this on my own and when i build my good Ole WratMax LML itll be thanks to Truck Master diesel for being my teacher!! The start up of this truck was so refreshing its been a long time coming. Happy you got er done i know it wasnt easy...or cheap!!

Seeing the FRP on your scan tool, and the other comments, the idle sounds just like my LB7 did when I forgot to plug the fuel pressure regulator back in.

Wifemax looks absolutely awesome, have you ever thought doing any powder coat work on Ole Red 🤷‍♂️🤷‍♂️🤷‍♂️ I'm hoping soon you can, NOT EARL, you can start dirt drags and truck pulls with the Wifemax and everything else 😂

down here in michigan any type of bare metal will rust within minutes P.s under coating the truck will keep the underneath of the truck preserved beautiful truck i love cat eye chevy i think the cat eye chevys was the best design chevy has ever made

Even the lights on the gauges are purple... it looks good

I remember all that stuff, fun times they are.

Seems like I've been waiting forever to here the Wifemax running. Now let's get her one the road!!! Don't try to tug-a-war with her again.... surely loose bad

I know you’ll get your wife’s max going, don’t give up. You got this.

Hey truck master you were the one who single handedly made me want to upgrade to a diesel from an 03 6.0 vortec. And that’s what I did, I drove all the way to Nevada from California and picked up a grandpa owned LBZ 165k mile SLT in show room condition from the original owner (he was a true grandpa, he looked like Yosemite Sam LOL. Needless to say I towed my Corolla on an auto transport all the way back home and I couldn’t tell the difference I was towing something back there. On 7% grades I’d be passing up semi’s at 80mph at times and I’d barely be on the throttle!! Not used to that much power/torque it’s insane. You da man, truck master!

Hell yeah! Good job Josh!

Wow Josh ! You really did an amazing job !! huge respect ✊

Tell you what I watched alot of your videos learning alot . Keep up the great work

You are one hell of a mechanic!

Damn! Do the problems never end! I hate rabbit holes.

Cliff hanger!!!! Damnit😂😂😂

Spray the bedliner with some clear coat and maaaan will that bedliner shines!!!

Excited for Melanie and proud for you.

0:17 Man, you're really understating the amount of money there lol. Just a head gasket job and new injectors on my LB7 was a few thousand to do on my own. It's always an awesome moment hearing an engine fire up as you nervously sit there cranking on the starter lol.

What trans cooler limes did you use? Love the Chanel keep up the good work

Sounded like a 7.3 there in the beginning

Has this issue and seen it many times. Check your grounds. Any off of the dual cp3 controller as well. Need that 5v reference as well. Always wiring 9/10 times

I've got all Friday off I'd love to come give you a hand , I'm about an hour away ish from you fyi

It’s always fun to get a dual fueler setup primed for the first time. Hope the fuel pressure isn’t a major fix

Hey Josh you looked at a problem with the injectors?! Can't wait for the next video Truck Master 🛠⚒️👍💨☠️💨🤠

Awesome build man ! Gonna be sick when you get that fp right 👍 congrats on a job well done

I had this issue when i did my cp3, make sure u didn’t plug alternator harness into your fuel pressure regulator ✔️

If the fuel rail pressure sensor becomes damaged or unplugged, it would demand 100% from the cp3 pump and knock like hell

Shes running!! Bin waiting for this one 💪🏽💪🏽🙏🏽

She's alive! She's finally alive! 🎉😅

Take the pressure on your lift pumps

You the man!!!

Man that’s crazy on the pressure I’m lost what that would be or why I’m ready to see her rip at the pulls!

The Wifemax is going to be a freakin' beast!

😂 the Fast FWD music is straight out of POWER NATION TV show playlist

Man , my friend l know how you are doing little by little swapping parts from one truck to other , l just to do work only on GM truck man l learn all the swapping parts very eased , l did not have very good technology’s like today that was on 1990 to 2010 , but your doing great job , l just do all mechanic, body work, praimer , and paint and nice shainy bofed clear coad like 3 or 4 pearls coad man afther it’s done you fell really happy no proud but humble very happy

I had a hsp twin turbos and I can't get anyone to tune it right 😢

Try replacing the fuel rail pressure sensor on the drivers side rail and see if that changes anything.

How do you like the harbor freight generator? Mounted mine to the rear bumper of my rv. I also bought a cord to plug it in directly to the camper no adapters.

Another awesome video as always! Been peeping your channel every day to see this video so Im very excited to see the vid and hear that truck roar to to life! Wish the best of luck to you to work out the bugs!

Lmao wifey heard it fire up and she turned up quick

25,000 on the idel rail pressure could it be because the air dog and the bigger pump?

I love my Enforcer T Shirt.

I keep getting welder's flash watching your vids w/o my helmet.😎

You have two sensors swapped backwards just had the same issue with my truck, pulled all the heads and everything

How did you mount the edge monitor in this truck? I like it a lot more than the window mount. Thanks for the content!!!!

Hopefully it’s just an unplugged fpr. When unplugged they max the fuel pressure

Nice! But lookit, for those of us who watched your entire video, can you please tell us what the "cliffhanger" was that made you abruptly squash your video? Was it the lack of a plan for Anti-freeze Water Coolant or you forgot to pop in a cassette from *Guardians* *of* *The* *Galaxy?*

That thing is sexy man! great work! Can't wait to see it after you work out all of the kinks!

Cannot wait to see this thing rip

Great video Josh! Can I bring the 05 up so that we can get started?😊

Awesome video!! Keep up the good work!!

my tech 2 will only demand 20k psi at idle, and you were just sitting at 21.5k psi at idle im assuming it has something to do with your dual fueler setup.

I won't use any trans cooler except a tru cool 40K.

❤clear codes disconnect batteries try again

Awesome shop damn I'm jealous :)

That uneven cranking doesn’t bother you? Sounds like a dead cylinder which seems weird on a new motor

Holy cow thats a lot of fuel pressure!!!

Hey Josh, how long ago did you get the compound turbo kit from HSP? I called them last June 2022 and they told me they no longer sell them. I have a LB7 and would like to install a compound turbo kit without relocating the battery. I cannot find any other kit that does not have to relocate the battery. I have been watching your channel off and on for several years and appreciate all you share with us.

TBH. I think the wife’s truck is a much better build then the Red truck. And probably got more power. I’d like to see some Dyno numbers from both

Lift pump runs with the key on? The guy at kennedy lift pumps talked me into the kit so it only kicks on when fuel pressure is present. In case you get in an accident it doesnt keep runnig.

fuel pressure regulator default max pressure .

Perfect brotha you don’t you have a shop yet?

Didn't you have WifeMax key tag? The wife was looking for one.

keep up the good work huge fan!!!

Ive been waiting for this!!

With all of the parts you bput on, I am shocked you put a stock oil pan back on initially.

I caught the duramax bug by watching your videos, and bought a 09 2500 hd. What size wheels and tires do you recommend? The tires on it are 275/60r20 115T, the wheels are on spacers/adapters. I like the way it looks however it scrubs when you cut it hard, and I want to do away with the spacers. Any help would be greatly appreciated, thanks.

Why can't u use a factory oil pan gasket instead of sealing it with a sealant

I use ams oil on my dirtbikes

So just wondering what oil you went with? I’m using amsoil but thought about hotshots blue diamond. Not a whole lot them vs each other. Badass truck now can we hear the blue flag give away truck start up?

Where did you get that cluster from I like the purple

Would you buy a 2016 Denali or you happy with your 2018? L5p harder to modify isn’t it ?

Hood stack it🤣 make sure to get a new hood heat shield, the twins might heat that hood enough to mess with the top coat

Just a guess but doesn’t the dual fueler need to be tuned as such.

this thing sounds like my 6.5 at idle