Hmmm...poing-poing-poing?

[Cattletrkr]

My truck sounds different on a darn near daily basis. It drives me nuts and someday it actually will be something. Until then I just turn the radio up a little...

 

[Lonestar]

After following Steved's injector thread, I had my injectors rebuilt by DonM. My truck has a slight miss at around 1300-1900rpms, and I'm wondering if it isn't my injector tubes? Makes a loud rattle sound accompanied by a miss, does this sound potentially like tubes?



Thanks

Corey

 

[steved]

I've heard that bad tubes do one of two things... they either don't get seated tightly, and that in turn causes fuel to get into the oil or it allows excessive return flow to the tank. You should either see the oil getting contaminated with fuel or the rail pressure lower than it should be.



And again, this is just what I've read about the cross-over tubes.

 

[steved]

And mine is changing sounds... I've pretty much determined my noise to be injector related... if you listen at the rail, it bangs pretty good.

I'm also getting a bunch of injector rattle as of late... however, I just ran an excessive dose of cleaner through and have yet to put different fuel to it (it takes a while to run 60 gallons of fuel through)... almost wonder if it isn't fuel related in my case.

Not sure what to tell you about a miss. Have you ran the valves lately? Could one cylinder be out of range?

 

[Bob4x4]

If they don't seal well they can miss and some cases will get worse as engine warms up,if it is bad enough I have also seen them set codes.



Bob

 

[steved]

Other than my noise, the truck runs like a champ...

I finally got to put fresh fuel in it last night (did some mods to the aux tank)... $151 in fuel for 730 miles at 41. 011 gallons. That's driving it like I stole it for 1/3 of those miles... 17. 8mpg is not too awful bad IMO.

I didn't pay attention to the noise today... had other things on my mind...

 

[Lonestar]

If they don't seal well they can miss and some cases will get worse as engine warms up,if it is bad enough I have also seen them set codes.



Bob

Interesting, mine gets worse as the engine gets warm. On a cold motor, its merely a slight rattle. On a hot engine, its more of a ping with a miss. Sounds like I need new tubes after all. I assume these would certainly hurt fuel mileage as well?



Thanks

Corey

 

[steved]

In my case, if the crossover tubes were the culprit I would see a decrease in rail pressure...



My noises were here a week, then disappear last night. The truck is more/less as quiet as it was... I'm almost pointing the finger at the fuel.

 

[steved]

Got my UOA... not internal issues for sure... 0 lead, 0 chromium, 2 aluminum, 3 silicon, and 11 iron... that's only 6600 miles on the oil though... ohh, and fuel was <0. 5% and insolubles were 0. 4%.



It is variable... makes noise one day, not the next... not going to worry about it...

 

[Johnstra]

Good call. Mine makes noises I don't really like, but my oil reports are good, mileage and power are good, so I'm not worrying about it.



-john

 

[Lonestar]

Taking my truck in on Friday to have all new crossover tubes installed. my mileage is around 9mpg pulling 4k below 70mph. Empty, it appears I'm getting about 12mpg at comparable speeds. Hopefully tubes will improve mileage, cure miss, and allow me to finaly start enjoying this truck.



Corey

 

[Cattletrkr]

was it the tubes?

 

[Lonestar]

tubes didn't fix a thing, so my final thought is to try and time the cp3 gear. Probably going to try and do that next weekend. I guess all in all the truck is running good, but I feel like it has a slight miss that correlates with the noise.



Corey

 

[Cattletrkr]

Anybody care to guess what kind of noise mine is making today???

Actually is been squeaking for a couple weeks. I assumed my water pump was going out again, this time taking its dear sweet time. Then...

This morning I came to a stop and I thought I forgot to push the clutch in the way it sounded. Nope, clutch on floor. engine dropped to around 500rpm, then bounced to maybe 1000. It did this a couple times before I revved it up and it went away. 15 miles later I got a "dead pedal" on the freeway. It lasted only a couple seconds and went away with a big cloud of black smoke. I noticed the truck smoking (black) more than what it usually does with the Smarty on SW#3.

Made it the rest of the way home fine. Unhooked the trailer and reprogrammed back to "stock". Made it 150ft and the truck died. Super fast turnover trying to restart, but no fire. Programmed #1 back in to see what would happen. It started and died. Just like it's running out of fuel. Let it sit for a couple minutes and it kinda kicked back at me and ground on the starter for a fraction of a second, but it started and ran. Went back to "stock" and it starts and runs almost normal.

When it starts it doesn't have that normal cummins pop to it. It kinda slides into a start.

Long story short, I have good fuel pressure, rail pressure was normal on the way home, Smarty is out (stock SW), and of course, NO CODES. The rail pressure needle has been bouncing slightly lately... something I tried to ignore.

Is this what happens when an injector goes funny?

bleepin truck won't even let me go without a repair long enough to trade it off. I've been trying to find the time for 3 weeks and I can't quite seem to get there. Priorities might be changing this afternoon.

 

[steved]

Other than mine knocked like hE**, mine smoked bad when I lost the injector. Prior to that I got a "kick back" start for about two months.



Your first symptoms sound like FCA (idle up and down, then dying, etc)...



Sorry to here about your problems... if I was in a different position (no travel) I'd own a 2500 Hemi, or F350 with a V10.

 

[Cattletrkr]

I disconnected the FCA and went for a short trip. Never actually moved the truck with that unhooked before. Man that's scary. Doesn't sound good at all. Hooked it back up and it's "normal" again.

I should add that earlier on the way home, I saw 1300* for the first time since installing the Smarty. Usually it's a struggle to hit 1200.

 

[Lonestar]

Well from the sounds of all the symptoms you listed, id have to say... ... . PUT SOME FUEL IN IT!! Sounds to me like its outta fuel, but I assume you're smarter than that, so I'd think next either the FCA, or CP3 going bye bye.

 

[Bob4x4]

I disconnected the FCA and went for a short trip. Never actually moved the truck with that unhooked before. Man that's scary. Doesn't sound good at all. Hooked it back up and it's "normal" again.



I should add that earlier on the way home, I saw 1300* for the first time since installing the Smarty. Usually it's a struggle to hit 1200.

running with the fca disconnected is not a good idea... ... ... ... ... that makes rail pressure max out.



Bob

 

[Cattletrkr]

running with the fca disconnected is not a good idea... ... ... ... ... that makes rail pressure max out.

Bob

I was shakin' in my boots the whole time it was running. I would highly recommend against it. I don't think it helped me any.

According to my RP gauge, it went to 27,500 and stayed there. It that as high as the pressure went, or is that just where the gauge/sensor cut out.

 

[Cattletrkr]

Well from the sounds of all the symptoms you listed, id have to say... ... . PUT SOME FUEL IN IT!! Sounds to me like its outta fuel, but I assume you're smarter than that, so I'd think next either the FCA, or CP3 going bye bye.

Well, yeah I hope so. FP was/is normal. Shouldn't be a LP or filter issue.

Didn't pull with the truck today. Put on maybe 60 miles w/o the trailer. Ran normal. Maybe a little "off" but nothing I could really say for sure other than a little black smoke on accel. That's not normal for no load and no chip/programmer. Of course it's been a while since I've driven "stock" so maybe that is normal for me now.