noisy injectors 1900-2100rpm

[tobaccogrower]

on my 06 i notice my injectors make alot more noise then usual on the highway at rpm's between 1900-2100. dosn't matter if i'm towing or empty. maybe it's my EDM's? i think there just tip's though. thanks... james

 

[Diesel Power]

what are you running for a fuel pump? a starving cp3 will pass the lack of fuel to the injectors and failure will result!! :{

 

[KSears]

I have an 05 which has a noise , I thought it was a kind of like rattling valves almost or a slight gurgling noise but I guess it could be the injectors, how would a person be able to tell if it could be a fuel pump, and what does this injector noise sound like, my truck has about 11000 miles so far, and I just added a few upgrades as to my signature, guess the dealer will refuse to fix it if the pump is bad now, but I am more interested if it might be a problem I need to deal with , if so what is the best solution for a long time fix? I had the noise prior to the upgrades.

 

[tobaccogrower]

the noise is like a ticking sound. i only notice it around 1900-2100rpm. i never have my ramifier turned on so i dont think i'm starving the cp3 for fuel... james

 

[DieselFiend]

Mine ticks at idle and rattles in the RPM range you mentioned. Oddly enough, it didn't start making that noice until I had my leaking CP3 replaced. I'm not sure if a different CP3 was installed or what. I'm very interested in responses for this thread also.

 

[Diesel Power]

the noise is like a ticking sound. i only notice it around 1900-2100rpm. i never have my ramifier turned on so i dont think i'm starving the cp3 for fuel... james

its not a constant fuel starvation, its any time the cp3 was starved will start the onset of problems---the injectors live off of diesel fuel with out it it will go metal to metal---then injectors start to leak fuel, carbon up, and otherwise fail. thanks

 

[jandr]

Mine gets louder at about 2500 to 2700 rpm during shifting(if I take it up that high... usually don't) but it sounds like valves to me. Otherwise all the misc. noises aren't consistent. All I have to compare it to is my '01 which is of course so loud I can't hear any minor noises!!!!

I'm still learning about the '06. I think it has a lot more technology built into it than I realize.

 

[archer2500]

Mine "clicks" at low RPM's (maybe at highway speeds but I cant hear it then) its VERY noticable while I am next to something that reflects the engine compartment noises back at me. There were a few other posts in here about that too and most said it was the injectors, and that it will go away if you add marvel mystery oil to your fuel, its supposed to lube the injectors. I have noticed that if I add mm oil when I fill up the fuel tank that the noise is diminished or gone completely but unless I add a bottle at every fill up the noise comes back, and that gets pricey. I'm not happy with the noise but atleast I believe I know where it's coming from and can deal with that.

 

[tobaccogrower]

the noise i'm hearing is loud and odd enough for a friend of mine who dosn't ride with me much to ask whats thet ticking sound! i'll try the MMO in the next tank. with the price of fuel i dont think it will be a every tank thing if it works!... . james

 

[BradyWilliams]

All 3rd gen. injectors make some ticking sounds. Air and or the starving of fuel through the fuel system will make it louder. The EDM injectors that you have will make the noise a lot louder. In fact the 3rd gen. EDM injectors that I have seen on the market may end up with problems. They usually have one or two larger holes added and what I have seen is that the fuel goes to the course of least resistance (large holes). The small stock holes don't have enough fuel flow to keep the holes from closing shut from carbon build up. This will cause a profound effect on the way your engine will run. You could help keep the injector holes open by hard loading the engine, but how offen that needs to be done I can't say. What we see also is that if you open all the holes the same, then you will not create a larger easier path for the fuel to redirect. To EDM all the holes large you will need a VERY large CP3 pump to keep the rail pressure up over 20,000psi. We rebuild 3rd gen. injectors. We offer rebuilt flow matched and tested at full rail pressure injectors. We also offer the same injectors that range from stock, stage 2, stage 3, stage 4, and all the way to stage 8. But the upper end of these injectors must have very large CP3 pumps added. Stage 8 injectors smoke at idle and must be sold only to someone that has the largest of cp3 pumps and the ability to custom tune the engine/fuel system. Hope this helps. Thanks

 

[Diesel Power]

so by having a edm injector and three of those holes are larger than the rest, wouldent that cause a flow restriction? the bodys dont sound like they are rebuilt?------thats important to me because the body will wear constantly the tip will not, all for like $1200, for just a tip---

i'll stick with the rebuilt extruded honed design!! :-laf

 

[BradyWilliams]

No the injector will be opened up, but the problem is that the fuel delivery must be evenly injected in the fire chamber. 3rd gen injectors have very small nozzle holes. By placing one or two large holes in the nozzle the small holes don't have enough fuel flow to keep them open. Light load and idle would create the biggest problem of this kind. When the small stock holes close off, the one or two large holes left open cause an uneven fire chamber combustion that makes the engine run bad.

 

[SP Diesel]

Sounds like it may be high injection pressure causing your noises. You'd have to put a gauge on the rail to know for sure. If ignition pressure is kept up while cruising you can hear a rattle when your not into the fuel pedal hard. This can also explain the rattle during a shift, because the engine load is reduced during the shift and the fuel pressure in the rail spikes momentarily.

 

[Scrappy]

Sounds like it may be high injection pressure causing your noises. You'd have to put a gauge on the rail to know for sure. If ignition pressure is kept up while cruising you can hear a rattle when your not into the fuel pedal hard. This can also explain the rattle during a shift, because the engine load is reduced during the shift and the fuel pressure in the rail spikes momentarily.

Will this hurt anything? Mine rattles quite a bit as I slowly come off the throttle @ cruise, but I really don't hear anything during shifts.

 

[Diesel Power]

No the injector will be opened up, but the problem is that the fuel delivery must be evenly injected in the fire chamber. 3rd gen injectors have very small nozzle holes. By placing one or two large holes in the nozzle the small holes don't have enough fuel flow to keep them open. Light load and idle would create the biggest problem of this kind. When the small stock holes close off, the one or two large holes left open cause an uneven fire chamber combustion that makes the engine run bad.

right thats pretty much what i was thinking, wasent sure though. thanks Oo.

 

[Tomeygun]

By placing one or two large holes in the nozzle the small holes don't have enough fuel flow to keep them open. Light load and idle would create the biggest problem of this kind.

So your saying to drive it like I stole it?



Done!



(STAR did say I dont run my truck hard enough, hahahaha)

 

[Diesel Power]

So your saying to drive it like I stole it?



Done!



(STAR did say I dont run my truck hard enough, hahahaha)

funny tom, they told me the same thing, 30% idle time----2%WOT time==your not driving hard enough, and a free high idle reflash

 

[tobaccogrower]

my truck has a preaty good blue haze coming out the exhaust while idleing. i hope these injectors dont cause a problem down the road!

 

[Diesel Power]

my truck has a preaty good blue haze coming out the exhaust while idleing. i hope these injectors dont cause a problem down the road!

smoke at idle is not a good sign, it usally means a leaky injector, or too much fuel