Possible injector replacement?
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Senior User
Joined: Jan 2005
Posts: 373
Likes: 2
From: Alberta, Canada
Possible injector replacement?
Hey guys ... i've been having some issues with my truck lately.
I am having issues with a studder at idle and the truck is smoking grey/blue/sometimes blackish grey.
I have full gauges and they are all in the green. Checked oil and antifreeze levels and both have not changed, and no puking from my degas bottle.
Leaning toward an injector going.
I just bought Autoenginuity and learning to use it. Tried all the graphs etc and still unsure about which injector might be giving a problem.
Got to the activation menu where you can shut off one injector at a time. I went from 1 then 2 and really noticed a difference in the running of the engine, then I got to 3 and noticed no change in the way the truck is now running. I went on to check the other injectors and same as 1 and 2 and I can clearly feel a difference.
So I am thinking #3 is toast, but which one is it? Looking in the engine bay whats the engine cylinder numbers?
As a precaution I do have a spare FICM that i'm going to try and also going to check the wiring harness while in there to see if that clears it up first before I open it up.
Anything i've overlooked here guys?
Thx!
I am having issues with a studder at idle and the truck is smoking grey/blue/sometimes blackish grey.
I have full gauges and they are all in the green. Checked oil and antifreeze levels and both have not changed, and no puking from my degas bottle.
Leaning toward an injector going.
I just bought Autoenginuity and learning to use it. Tried all the graphs etc and still unsure about which injector might be giving a problem.
Got to the activation menu where you can shut off one injector at a time. I went from 1 then 2 and really noticed a difference in the running of the engine, then I got to 3 and noticed no change in the way the truck is now running. I went on to check the other injectors and same as 1 and 2 and I can clearly feel a difference.
So I am thinking #3 is toast, but which one is it? Looking in the engine bay whats the engine cylinder numbers?
As a precaution I do have a spare FICM that i'm going to try and also going to check the wiring harness while in there to see if that clears it up first before I open it up.
Anything i've overlooked here guys?
Thx!
Elder User
Joined: May 2008
Posts: 765
Likes: 0
From: Patricia, Alberta
Also try doing an injector buzz when the engine is stone cold. Tomorrow morning would be a good time, it should be around -10. It buzzes them in numerical order 3 times...all of them at once, then 1 thru 8 individually, then repeats it again twice. If you have a stiction problem, it might show up on the buzz...there will just be silence instead of the injector clicking. Even if you don't find anything, it's neat to do it just to entertain yourself.
Logistics Pro
Joined: Mar 2007
Posts: 4,604
Likes: 4
From: Claremore, OK
+2 on checking for a contribution/balance code. If you run the contribution test...let it run for a couple of minutes and watch the bar graph. The trouble maker should stick out from the rest...either above or below them depending what it's doing. When mine cracked an injector last summer, the one that was cracked was barely 200 rpm off the rest when I did the contribution test...the rest were pretty much in line with each other.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
Sounds like an overfuel issue but with #3 not making a difference one way or the other and no codes I'm a little confused (but what's new there??? LOL).
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