What Are The Warning Signs When Injectors Are Going Bad? - Dodge Cummins Diesel Forum
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Old 07-11-2012, 03:30 PM   #1 (permalink)
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What Are The Warning Signs When Injectors Are Going Bad?

Injectors go bad and destroy an engine.

What do you do to avoid that from happening?

How do you know the injector/injectors are a problem before the engine is trashed?

Seems to be a fairly common problem and no safeguards - which makes owning a diesel - which should be a troublefree truck a potential timebomb and money pit.
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Old 07-11-2012, 04:01 PM   #2 (permalink)
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change fuel filter regularly, pull some injector cleaner (diesel) through them every once in a while

per my limited knowledge only gained by reading posts on these forums, white smoke out of the exhaust and after you turn the key off your engine goes to 6k rpms for a small amount of time
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Old 07-11-2012, 04:02 PM   #3 (permalink)
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hard starting, making oil, white smoke, rough operation, injector knock, search button, useful tool.
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Old 07-14-2012, 08:05 AM   #4 (permalink)
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Originally Posted by CRCarnage View Post
hard starting, making oil, white smoke, rough operation, injector knock, search button, useful tool.
Im aware of the search button. However, I was hoping for some specific info.

When an injector/injectors go bad and wash out a cylinder, or cylinder,s and do engine damage that is costly. In order to avoid that from happening Im looking for ways to know its happening at that time it actually happens. in other words, to avoid potential engine damage.

This seems to be a somewhat common problem and it appears that the truck is not made with any safeguards to keep this from happening. Or there are no warning signs/indicators to let you know its happening until its too late.

Example, most vehicles have an idiot light or oil pressure gauge. You get a red light, or the oil pressure gauge shows no/low pressure you shut it down to avoid more costly damage.

On these Cummins an injector that floods cylinders washes out the oil and lubrication and you screw up your motor. So why no warning signs? Or is there any kind of warning? If not, its a major screw up by Dodge considering the potential for engine damage.

If Dodge wasn't bright enough to have any way to know when this is happening, what can we do to protect ourselves if we are in the situation? Who wants to own and drive a truck that at any time can have an injector go bad and destroy the engine - and have no way of knowing its happening?
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Old 07-14-2012, 08:12 AM   #5 (permalink)
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Get you oil checked every, oil change. Send it to the lab.
When your fuel % numbers go up then you got issues

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Old 07-14-2012, 09:11 AM   #6 (permalink)
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Put a real oil pressure gauge in your truck. A drop in pressure will not show on the in dash gauge. I saved a Cummins ISB engine at work when the pressure was dropping below normal because the crank case was filling with fuel. That engine is still running a few years later.
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Old 07-14-2012, 11:36 AM   #7 (permalink)
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Get you oil checked every, oil change. Send it to the lab.
When your fuel % numbers go up then you got issues

sent from my mobile
That might work, but way too impractical. Who would want to do that every oil change?
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Old 07-14-2012, 11:37 AM   #8 (permalink)
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Originally Posted by papaduck View Post
Put a real oil pressure gauge in your truck. A drop in pressure will not show on the in dash gauge. I saved a Cummins ISB engine at work when the pressure was dropping below normal because the crank case was filling with fuel. That engine is still running a few years later.
Ok, sounds like a good idea.

Still Dodge should have something in the truck as a legitimate warning IMO.
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Old 07-14-2012, 12:00 PM   #9 (permalink)
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You have been given good answers. If you think there needs to be a better warning system, maybe you could get rich coming up with one. Just curious, since you want to bash Dodge for not having a better warning system, what warning system do chevy and ford use? What about Peterbilt and Kenworth?
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Old 07-14-2012, 12:35 PM   #10 (permalink)
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where does a guy get a "real" oil gauge?
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Old 07-14-2012, 12:45 PM   #11 (permalink)
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Any diesel performance shop.
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Old 07-14-2012, 01:00 PM   #12 (permalink)
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Quote:
Originally Posted by CRCarnage View Post
hard starting, making oil, white smoke, rough operation, injector knock, search button, useful tool.
Search on all these forums is about as good as boobs on a guy; good for a quick glimpse, but then you really see what's going on and it's completely worthless.

In other words, search is a joke.

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Originally Posted by tijuanasam View Post
So why no warning signs? Or is there any kind of warning? If not, its a major screw up by Dodge considering the potential for engine damage.

If Dodge wasn't bright enough to have any way to know when this is happening, what can we do to protect ourselves if we are in the situation? Who wants to own and drive a truck that at any time can have an injector go bad and destroy the engine - and have no way of knowing its happening?
First off, Dodge didn't design the fuel system, Bosch did. Bosch also designed the system used in the Duramax as well as the system used on the 6.7 Powerstroke, not to mention the system used on VW's and Mercedes, and....see a common thread here?

Don't blame the vehicle manufacturer for the issue. For some reason, the Cummins seems to have far more issues with injectors going bad and eating a piston or two...Duramax trucks largely don't (LB7 sounds like it's still a problem); I've yet to hear of a 6.7 Powerstroke popping pistons, or a VW. Even tuned, I don't think it's an issue really with them. But, something in the Cummins system certainly cause alarm; I've toasted two engines with injectors as the root cause. I'm at the point, hey if it blows, it blows. Build another to support more power. A failure is simply an opportunity to upgrade.

So, how is a manufacturer supposed to monitor injector health on the fly?? Let's see, I believe VW has a new injector design that monitors cylinder pressure, but I bet an injector failure wouldn't show up as a definitive "injector 4 is going bad, replace it". Sounds like a billion-dollar prospect, get on it.
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