Duramax Noise

[rsaint]

Its a 07 classic 230k coming home and a intermittent like a lifter ping that comes on for a few seconds and if you let off it goes away injector noise??

 

[Summitric]

Possibly....injectors are common..... Try some really good cleaner/conditioner, like stanadyne and see if it goes away or improves. Did this just start happening in colder weather? Gas stations are running winter diesel and it can make noisy injectors more pronounced


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[tex78]

Possibly....injectors are common..... Try some really good cleaner/conditioner, like stanadyne and see if it goes away or improves. Did this just start happening in colder weather? Gas stations are running winter diesel and it can make noisy injectors more pronounced


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Add two cans of sea foam to a full tank of fuel

Best cleaner there is

Buddy had a old 6.9 ford dsl.. only thing that made it start and run good

He tried everything that's made..

 

[LBZ]

Add two cans of sea foam to a full tank of fuel

Best cleaner there is

Buddy had a old 6.9 ford dsl.. only thing that made it start and run good

He tried everything that's made..

X2.
Is it all stock or does it have any performance mods done?

 

[rsaint]

Have a EFI chip but just started doing it today was running Lucas in it but quit a while back will try sea foam and see check engine lite was or is on have 1 glow plug not working for awhile now #1 cylinder.

 

[X-Treme]

Possibly....injectors are common..... Try some really good cleaner/conditioner, like stanadyne and see if it goes away or improves. Did this just start happening in colder weather? Gas stations are running winter diesel and it can make noisy injectors more pronounced


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Didn't the injector issue end in '04.5 with the release of the LLY? I thought the injectors were only a problem on the LB7.

 

[LBZ]

Have a EFI chip but just started doing it today was running Lucas in it but quit a while back will try sea foam and see check engine lite was or is on have 1 glow plug not working for awhile now #1 cylinder.

Set it back to stock and see if it goes away.
Also I'd pull that glowplug and make sure the tip didn't fall off!! I don't need to tell you what your noise is if this is the case.......
Injector issues after the LB7 models were rare but sometimes you can get a sticky needle even in the new ones. I'd run some cleaner and see what happens.

 

[rsaint]

Set it back to stock and see if it goes away.
Also I'd pull that glowplug and make sure the tip didn't fall off!! I don't need to tell you what your noise is if this is the case.......
Injector issues after the LB7 models were rare but sometimes you can get a sticky needle even in the new ones. I'd run some cleaner and see what happens.

The glo plug issue has been there for some time and the first thing i did was switch back to stock and quit for a bit and is doing it still. Will check the glow plugs.

 

[medler]

Hope fully your glow plugs don't snap off!! Let them soak for a while if you plan on removing one

 

[rsaint]

Hope fully your glow plugs don't snap off!! Let them soak for a while if you plan on removing one

What do you mean soak

 

[medler]

Soak the glow plugs with fluid.

We have three dead glow plugs in our 04 LLY. One busted off when it was removed. $4,500 to remove the heads and get them out
Apparently GM never put any anti seize on them from the factory. Steel glow plugs in aluminum heads. Ours has 280,000
So it's possible they will break off

 

[rsaint]

Got it. tryed to pull codes but they are unknown now efi code is p0116 or 0280 and old bullydog is u1026 anyone know what these are.

 

[tex78]

The u code is a communication code, I.d have to check the otheres

 

[tex78]

Soak the glow plugs with fluid.

We have three dead glow plugs in our 04 LLY. One busted off when it was removed. $4,500 to remove the heads and get them out
Apparently GM never put any anti seize on them from the factory. Steel glow plugs in aluminum heads. Ours has 280,000
So it's possible they will break off

Ya I have never ever broke one off


But while I was gone on holidays, the one retarded tech at work broke one drilled it out a ways.. Then they left it for my to fix


I got it with a long twisted extractor without pulling the head

 

[medler]

Probably doesn't help that the truck was from Out east either Oh well she still starts ok in -10 /-15. It will have to last a little while longer. Not worth putting the money into.

 

[medler]

Got it. tryed to pull codes but they are unknown now efi code is p0116 or 0280 and old bullydog is u1026 anyone know what these are.

http://www.obd-codes.com/p0116

No idea if this is helping or not. Just googled that p0116

 

[rsaint]

Just tried it while running and came up #1 glow plug and reset but will come back on going to pick up sea foam have 1/4 tank of fuel going to change filter and add a can and see.

 

[tex78]

The p0116 is for the engine coolant temp sensor ckt ...

Clear the codes as who knows how long they been in there, see what comes back current code

 

[rsaint]

The p0116 is for the engine coolant temp sensor ckt ...

Clear the codes as who knows how long they been in there, see what comes back current code

Cleared codes and took for a drive seems to do it under very light load it starts to ping or rattle 4-5 times and louder sound and starts cycle again untill you tromp on it and does not do it till you let off around 1500 rpm goes away for awile and comes back when it does it it feels as there is a miss and no codes come up.

 

[tex78]

Well u may have to take it to a dealer, make sure it has new filter, and see if it has any injector codes... Also tell them to check the balance rates of injectors and any over ( + or -) 3 mm suggest fixing... The spec is 4 but I have seen ones just over 3 either lean or rich on fuel and cause issues