Injector contribution test question - Dodge Cummins Diesel Forum
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post #1 of 5 (permalink) Old 01-28-2014, 09:01 AM Thread Starter
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Injector contribution test question

Hey guys I know this has been covered but all topics were closed. On my 05 I did wolf creek 60's with new Bosch bodies. Ever since my mpg has dropped from 16ish to about 13 and I have a steady haze driving. Curious how I run a contribution test? Or do I have to go to cummins or the dealer?


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post #2 of 5 (permalink) Old 01-28-2014, 09:19 AM
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Quote:
Originally Posted by 05straight6 View Post
Hey guys I know this has been covered but all topics were closed. On my 05 I did wolf creek 60's with new Bosch bodies. Ever since my mpg has dropped from 16ish to about 13 and I have a steady haze driving. Curious how I run a contribution test? Or do I have to go to cummins or the dealer?
It's done using one of the OBD tools such as the Starscan (or other electronic tool as well, just not sure which exact ones). Best bet is go to your local dealership or diesel shop and go straight to the service area and ask for the lead diesel tech. Start talking with him and showing him your interest in knowing the health of your injectors. Offer him some cash and see if on his break he'll run the kill and contribution tests for you (literally take 5 min to do both).

I just did those tests yesterday...see thread here: Results of my Injector Kill Test and Contribution Test - Your Thoughts??

Only cost me $25 to do both tests and enable manual high idle. Moral of story - go make friends with the lead diesel tech and get it done for some cash or a case of beer.

As for the haze, some members here have stated that when going with +50 or +60 hp injecotrs that a tuner like a Smarty or EFILive is needed to adjust timing to take some haze out of the mix

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post #3 of 5 (permalink) Old 01-28-2014, 07:02 PM Thread Starter
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Awesome thanks man. I got ahold of an old friend of mine at the dealer and Thursday his highly recommended diesel guy is in so he's gonna run the tests for me. I really just wanna make sure everything's in-check while I still can. Don't want anything bigger coming out of neglect.

I used a snap on solus to do a kill test ( how I found my bad injector before) and the fact it was making oil. Idk if it will do contribution.

I also heard the same with going bigger but I put a smarty jr and any way I adjust timing has no effect. That's why I'm thinking maybe they're out of whack

2005 qcsb 3500 srw Laramie 4wd - 5" straight pipe, fresh trans with triple disc, red eagle clutches, HD rigid bands and some billet goodies in there, smarty s06, GDP 2micron, 8k xenon hid lows/fogs, 4pod above mirror with trans,egt,boost,RP
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post #4 of 5 (permalink) Old 01-29-2014, 11:37 AM
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what color is the haze and do you see it at idle.

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post #5 of 5 (permalink) Old 01-29-2014, 03:45 PM Thread Starter
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what color is the haze and do you see it at idle.
At idle I do see it when first started and also after running, it's black not like it would be when hammering, but still black. And driving I'd say its a dark grey black...again not as dark as WOT

2005 qcsb 3500 srw Laramie 4wd - 5" straight pipe, fresh trans with triple disc, red eagle clutches, HD rigid bands and some billet goodies in there, smarty s06, GDP 2micron, 8k xenon hid lows/fogs, 4pod above mirror with trans,egt,boost,RP
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