rough idle white smoke... - Dodge Cummins Diesel Forum
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post #1 of 21 (permalink) Old 10-13-2011, 12:52 AM Thread Starter
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rough idle white smoke...

i have a 2004.5 i got with 150,000 miles. when i first got it, i noticed it would idle roughly and if i turned my a/c on it would go away. now it gets bad and the throttle will get stuck about 2,000 rpms in drive or nuetral and ill have to stop it by braking or cutting it off. its also blowing white smoke.. i had a quadzilla xzillaraider on pl 5, k&n intake, and 4 inch straight pipe exhaust. It hasnt had a valve adjustment or injector replacement to my knowledge.. i got it off iaai.com any help would greatly be appreciated.

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post #2 of 21 (permalink) Old 10-13-2011, 12:18 PM
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You could have a number of problems but injectors, FCA, Quadzilla on level 5 with no aftermarket fuel filtration are just a few possibles that stick out to me. I have a quadzilla, but I also have a 2 Micron fuel filtration set up and never run it above lvl 3.

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post #3 of 21 (permalink) Old 10-13-2011, 12:31 PM
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Pull your injectors and have them tested/replaced. It will be cheaper than rebuilding the engine if you continue to run it in this condition, assuming you've not already put a hole thru a piston.

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post #4 of 21 (permalink) Old 10-13-2011, 12:43 PM
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Quote:
Originally Posted by TX_Dj View Post
Pull your injectors and have them tested/replaced. It will be cheaper than rebuilding the engine if you continue to run it in this condition, assuming you've not already put a hole thru a piston.
....

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post #5 of 21 (permalink) Old 10-13-2011, 04:11 PM Thread Starter
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is there any other solutions? im 20 and i paid cash for this truck and i dont have alot of capital and dont really wonna drive a big block chevy everyday lol. can a wire harness that was soaked in diesel fuel cause this? im planning to replace it this week because i feel it effected the contacts
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post #6 of 21 (permalink) Old 10-13-2011, 04:12 PM
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Just for fun cycle your key on off on off on and leave on. Read the codes in the odometer window. If none it will just read done.
I would say disconnect your quadzilla and return to stock but,
I think the white smoke is only at cold start-up but lot's of it right.
You probably get black smoke when the RPM is sticking high.
It's injectors. Only buy new BOSCH injectors not re-man's.

Mine was really fun in an automatic when I had a couple sticking open. Stepping on the brake and trying to stop the truck was an experience you don't forget.

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post #7 of 21 (permalink) Old 10-13-2011, 04:19 PM
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Quote:
Originally Posted by rideorange812 View Post
is there any other solutions? im 20 and i paid cash for this truck and i don't have alot of capital and don't really wonna drive a big block chevy everyday lol. can a wire harness that was soaked in diesel fuel cause this? im planning to replace it this week because i feel it effected the contacts
If so you would be throwing codes 99.9% of the time.

It could cause all the symptoms except the white smoke. Only water in the combustion chamber or a failed injector can do that.
Grey smoke accompanied with your engine RPM's running away or sticking could be a failed turbo or turbo seal allowing oil into the intake. You could remove the hose right after the turbo to confirm that.

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post #8 of 21 (permalink) Old 10-13-2011, 04:31 PM Thread Starter
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im constantly gettng p0236 and p0713. it also hasnt rough idled in a few days and the throttle hang isnt as severe. i ran 50/50 burnt motor oil and fuel as well but the truck has had these symptons at 150000 miles and im at 159000 now
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post #9 of 21 (permalink) Old 10-13-2011, 04:35 PM
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50% waste engine oil is 10x as much as the maximum Cummins specs. They say not to go over 5%.

Likewise, if you have the stock filter canister, you're not filtering that oil well enough, and there's a lot of particulates smaller than the stock filter's cut off that are still too big for the injectors.

I won't be terribly surprised if what you're seeing is GREY smoke, but I'd be even less surprised if your HPCR has turned your 50/50 oil fuel mix into a nice slurry for wearing your injectors out rapidly.... especially at higher pressures.

If you have 159,000 miles on the truck on original injectors, and have been running even the most clean diesel through the stock filter, it's time to change the injectors.

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aFe Stg 2 / Pusher / GH Delete / FTE 5" TBE
AirDog II DF-165 (P551315/BF1275) / GDP Canister Delete / Bosch 505 - Stock Tips (Replaced @ 112,381 mi)
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Best Tanks: 16.6 towing / 23.92 unloaded hwy / 23.2 city

Last edited by TX_Dj; 10-13-2011 at 04:38 PM.
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post #10 of 21 (permalink) Old 10-13-2011, 04:36 PM Thread Starter
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id also note the amount of white smoke it blows varies and still does it on straight diesel. i have creepes over a month and im clueless on this from what ive read and cant pin point it. i was thinkin harness than fca that lift pump and if not that than check injectors?
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post #11 of 21 (permalink) Old 10-13-2011, 04:40 PM
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Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors. Injectors.

2007 3500 MC DRW 4x4 5.9L (122k mi)
G56 / SBC SDD3250
aFe Stg 2 / Pusher / GH Delete / FTE 5" TBE
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Autometer / JVC / Polk Audio
Best Tanks: 16.6 towing / 23.92 unloaded hwy / 23.2 city
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post #12 of 21 (permalink) Old 10-13-2011, 04:41 PM
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INJECTORS

you've got more problems than a minor diesel soak of the wiring

analyze and find the real problem.

Dodge Ram 2500 5.9 Blow-By - YouTube

Dodge Ram 2500 Cummins 5.9 blow-by - YouTube

plan on driving the Chev. until you find the problem unless you have an extra $12,000 to spend on a new Cummins crate engine.

just brush some soapy water on the wiring harness and lightly mist spray off. no hard stream or power washer. then pull the connectors apart, spray with electrical contact cleaner and then coat with silicone dielectric grease. NO substitutes especially NO WD-40. The wiring diesel soak is not the cause of all your engine problems.

sounds like you just bought someone else's throwaway trouble that was not treated and maintained by the prior owner.

"""is there any other solutions?"""

sell it to some other sucker if you don't want the problem of fixing the engine correctly.

Cummins are like a good woman, gotta take care of it and treat it right or you're not gettin' any tonite and for awhile to come.

Burning used motor oil in a HPCR Cummins is like having sex with a blow up plastic doll. Ruins a great engine and ruins a man.

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Last edited by steelhead01; 10-13-2011 at 04:49 PM.
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