Not So Pro 3

[41FanForLife]

damn slackers

You must be referring to me. Slacker

 

[dall]

You must be referring to me. Slacker

everyone slacker so yes you too

 

[Slumberjack]

Think the ol lift pump in my truck is getting tired. On the way home from work I trended commanded vs actual rail pressure because it runs fine until at full throttle. Fuel filters just changed. 150000 miles. I gotta put a guage on my fuel inlet to my cp3 and see what it’s dropping to. I’m thinking below 5psi under load could cause this as the cp3 bypass circuit to dump pressure to the return to keep itself lubed and cooled. Other then that could be the rail relief valve getting weak. Possibly just the fuel control actuator on the cp3. Anything Ive missed chime in. Cmd vs actual trends together fine until full throttle @redline4

 

[redline4]

Think the ol lift pump in my truck is getting tired. On the way home from work I trended commanded vs actual rail pressure because it runs fine until at full throttle. Fuel filters just changed. 150000 miles. I gotta put a guage on my fuel inlet to my cp3 and see what it’s dropping to. I’m thinking below 5psi under load could cause this as the cp3 bypass circuit to dump pressure to the return to keep itself View attachment 295243 View attachment 295244 View attachment 295245 View attachment 295246 lubed and cooled. Other then that could be the rail relief valve getting weak. Possibly just the fuel control actuator on the cp3. Anything Ive missed chime in. Cmd vs actual trends together fine until full throttle @redline4

I'm not much help, I don't speak fluent Mopar.
Up until the 2017 L5P, we didn't use a lift pump, fuel supply was strictly vacuum.
If you can't achieve max rail pressure, it's either supply, pump or its being returned. No idea how they do the pressure regulator/relief valve tests on the Cummins and the Duramax tests won't be any help.

 

[Slumberjack]

I'm not much help, I don't speak fluent Mopar.
Up until the 2017 L5P, we didn't use a lift pump, fuel supply was strictly vacuum.
If you can't achieve max rail pressure, it's either supply, pump or its being returned. No idea how they do the pressure regulator/relief valve tests on the Cummins and the Duramax tests won't be any help.

Agreed on all of that. These require pressure on the inlet unlike the old duramax.

 

[Slumberjack]

I'm not much help, I don't speak fluent Mopar.
Up until the 2017 L5P, we didn't use a lift pump, fuel supply was strictly vacuum.
If you can't achieve max rail pressure, it's either supply, pump or its being returned. No idea how they do the pressure regulator/relief valve tests on the Cummins and the Duramax tests won't be any help.

I’ll slap a guage on the inlet to the cp3 and take a drive just to see what’s happening.

 

[Slumberjack]

I'm not much help, I don't speak fluent Mopar.
Up until the 2017 L5P, we didn't use a lift pump, fuel supply was strictly vacuum.
If you can't achieve max rail pressure, it's either supply, pump or its being returned. No idea how they do the pressure regulator/relief valve tests on the Cummins and the Duramax tests won't be any help.

I can also just plug the rail relief to rule that part out. Doesn’t need that on stock fueling.

 

[redline4]

If a garbage can were to *f-word an overfill port-a-crapper in an enclosed space, I think it would smell just like this pile of *s-word.

 

[Slumberjack]

If a garbage can were to *f-word an overfill port-a-crapper in an enclosed space, I think it would smell just like this pile of *s-word.
View attachment 295247 View attachment 295248

Eeeesh worse than a Chevy cruise?

 

[redline4]

Eeeesh worse than a Chevy cruise?

I have a strong stomach, but the odor of this thing is just disgusting.
The windows look like someone smeared an entire can on Crisco on them too.

But, he's obviously a true pimp azz gangsta.

 

[Slumberjack]

I have a strong stomach, but the odor of this thing is just disgusting.
The windows look like someone smeared an entire can on Crisco on them too.

But, he's obviously a true pimp azz gangsta.
View attachment 295250

Oh I see. Playa play der!

 

[Agent Smith]

If a garbage can were to *f-word an overfill port-a-crapper in an enclosed space, I think it would smell just like this pile of *s-word.
View attachment 295247 View attachment 295248

You should see some of these chics cars around here. They're literally driving garbage trucks the insides are so full of trash. I yell at the gf all the time to clean up her crv. Tell her it's not a $25,000 garbage can

 

[timg]

Think the ol lift pump in my truck is getting tired. On the way home from work I trended commanded vs actual rail pressure because it runs fine until at full throttle. Fuel filters just changed. 150000 miles. I gotta put a guage on my fuel inlet to my cp3 and see what it’s dropping to. I’m thinking below 5psi under load could cause this as the cp3 bypass circuit to dump pressure to the return to keep itself View attachment 295243 View attachment 295244 View attachment 295245 View attachment 295246 lubed and cooled. Other then that could be the rail relief valve getting weak. Possibly just the fuel control actuator on the cp3. Anything Ive missed chime in. Cmd vs actual trends together fine until full throttle @redline4

Is this 5.9 or a 6.7L Pat. Actually I surprised it's not showing and high or low rail pressure errors. Normally on a starved supply to the low pressure pump the controller pulses the high side outputs causing the high rail pressure errors. Be careful on those common rail systems my man. I don't want to read about on a fuel oil injection injury to your hand or face. Don't want to blow that Fro off LOL!!
BTW, Your actual and commanded fuel pressures are very close. In Komatsu//Cummins world a differential drop of more than 2-3ooo psi between the two is a red flag. Is the 22,000psi under load down the road? And the 7000psi is @ idle?? Those can build close to 28,000psi on a good system.

 

[Lightning Performance]

Preciate cha. I'm kinda partial to mine. Sucks though that even with no corn fuel the past five plus years it still stiffened up.

Stiff

Don't worry your joints are due to stiffen up soon from corn fuel


Afternoon hackets

Time to test and tune up top this afternoon.
Carry on

 

[Slumberjack]

Is this 5.9 or a 6.7L Pat. Actually I surprised it's not showing and high or low rail pressure errors. Normally on a starved supply to the low pressure pump the controller pulses the high side outputs causing the high rail pressure errors. Be careful on those common rail systems my man. I don't want to read about on a fuel oil injection injury to your hand or face. Don't want to blow that Fro off LOL!!
BTW, Your actual and commanded fuel pressures are very close. In Komatsu//Cummins world a differential drop of more than 2-3ooo psi between the two is a red flag. Is the 22,000psi under load down the road? And the 7000psi is @ idle?? Those can build close to 28,000psi on a good system.

6.7 it is showing low rail pressure code.

 

[Slumberjack]

Is this 5.9 or a 6.7L Pat. Actually I surprised it's not showing and high or low rail pressure errors. Normally on a starved supply to the low pressure pump the controller pulses the high side outputs causing the high rail pressure errors. Be careful on those common rail systems my man. I don't want to read about on a fuel oil injection injury to your hand or face. Don't want to blow that Fro off LOL!!
BTW, Your actual and commanded fuel pressures are very close. In Komatsu//Cummins world a differential drop of more than 2-3ooo psi between the two is a red flag. Is the 22,000psi under load down the road? And the 7000psi is @ idle?? Those can build close to 28,000psi on a good system.

You saw the real time numbers being the same. It’s only under full throttle the rail pressure drops as shown in the trend. The low rail pressure code being a maturing code will come in after a few cycles of this. Which is why I trended it. I’m very familiar with these.

 

[Slumberjack]

6.7 it is showing low rail pressure code.

Pretty common to plug the relief on stock mildly tuned common rails. I didn’t pull that out of my ass lol

 

[Slumberjack]

Is this 5.9 or a 6.7L Pat. Actually I surprised it's not showing and high or low rail pressure errors. Normally on a starved supply to the low pressure pump the controller pulses the high side outputs causing the high rail pressure errors. Be careful on those common rail systems my man. I don't want to read about on a fuel oil injection injury to your hand or face. Don't want to blow that Fro off LOL!!
BTW, Your actual and commanded fuel pressures are very close. In Komatsu//Cummins world a differential drop of more than 2-3ooo psi between the two is a red flag. Is the 22,000psi under load down the road? And the 7000psi is @ idle?? Those can build close to 28,000psi on a good system.

How’s Tim?

 

[timg]

Enjoying the nice dry warm weather Pat. Chasing an issue on a large wheel loader today. Here are a couple pics of an Ontario stone ship coming into the dock I'm working at today. You still making water pumps on stand by?

 

[USMC615]

Beer thirty in 30...