A Quiet 6.0?
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Senior User
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A Quiet 6.0?
I've noticed something stange about my 6.0 with 2500 miles on it. Sometimes, and it appears to be random while idling in park, the famous diesel knock is barely audible. It's like someone hit a switch for quiet mode. Then when I hit the throttle, it goes back to normal. The rpm is same each time.
Any ideas on why it does this?
Any ideas on why it does this?
Senior User
Joined: May 2004
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From: Alabama
The engine is quiet at idle because they now open the EGR to quieten it down. Pilot injection originally performed this function but was done away with due to problems. Under normal operation the clatter should return when you tap the throttle.
Junior User
Joined: Jan 2005
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From: Parrish, FL
gonnasellit hit the nail on the head. mine got really "bad" & they had to replace the EGR at about 50,000 miles. we confirmed it at the dealer when the tech had his laptop hooked up to it; he could open & close the valve via the program & you could hear the tone change. mine was actually affecting driveability when they replaced it....
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egr valve
When did they come out with the open egr valve. The last flash I had was 4-28-04.
Originally Posted by gonnasellit_temp
The engine is quiet at idle because they now open the EGR to quieten it down. Pilot injection originally performed this function but was done away with due to problems. Under normal operation the clatter should return when you tap the throttle.
Posting Guru
Joined: Oct 2004
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From: Lynden, WA.
From the Dieselman's page: "The EGR valve introduces exhaust gases into the intake manifold at cruising speeds to lower the combustion temperatures, which reduces oxides of nitrogen (NOx) emisions. Exhaust gases pass through a cooler to reduce their temperature before reaching the EGR valve. The only way the exhaust gases can flow into the intake is if the exhaust backpressure is higher than intake manifold pressure, so the computer adjusts the VGT to provide the necessary backpressure when EGR flow is needed."
Which is funny, this most only happens during deceleration. Just about the least efficient time when an engine is operated.
So, they changed the points which the EGR valve opens/closes? Oh, now there's rocket science. Let's introduce even more unburned fuels into the manifold. OK, that's what should allow for better fuel econonmy when at idle. (That would be if any of that exhaust was actually flamable) But, I can see the threads coming already. EGR valves sticking on long idles. Haven't there been enough problems since introducing EGR to Deisels?
Now, if this does indeed quite the diesel, then why not design a valve with a small venturi that performs the same function of allowing metered exhaust carbons in, yet still allows the rest of the valve run through it's duty cycle of Open/Close when the back and manifold pressures hit the pre-determined values?
Which is funny, this most only happens during deceleration. Just about the least efficient time when an engine is operated.
So, they changed the points which the EGR valve opens/closes? Oh, now there's rocket science. Let's introduce even more unburned fuels into the manifold. OK, that's what should allow for better fuel econonmy when at idle. (That would be if any of that exhaust was actually flamable) But, I can see the threads coming already. EGR valves sticking on long idles. Haven't there been enough problems since introducing EGR to Deisels?
Now, if this does indeed quite the diesel, then why not design a valve with a small venturi that performs the same function of allowing metered exhaust carbons in, yet still allows the rest of the valve run through it's duty cycle of Open/Close when the back and manifold pressures hit the pre-determined values?
Last edited by jackofalltrades; May 9, 2005 at 03:31 PM.
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ejancaus Welcome to FTE
take a look see at this
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take a look see at this
https://www.ford-trucks.com/forums/s...d.php?t=325000
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Post Fiend
Joined: Apr 2004
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From: Great State of Texas
Well...it has been a mucho very long time since I have said this so I feel it is my 6.0 given right to say it again...here and now.
The EGR valve is a wart
The EGR valve is a wart
And therefore, should be removed.
please let's refan from the yelling. edited by moderator
please let's refan from the yelling. edited by moderator
Last edited by captchas; May 12, 2005 at 04:52 AM. Reason: yelling. over size print
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Joined: May 2005
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I'm sure you have talked about this alot, but I have aprox the same build date and purchase date as your 250. I had mine flashed, unknowing it would disable the pilot injection. Does getting rid of the "Wart" effect the efficiency or have any other ill effects?
Can you tell me when they came out with the " Open EGR " as a fix for the noise? Last reflash I had was 04-15-04
Thanks for your help
Can you tell me when they came out with the " Open EGR " as a fix for the noise? Last reflash I had was 04-15-04
Thanks for your help
Post Fiend
Joined: Apr 2004
Posts: 19,098
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From: Great State of Texas
If you have an 10/03 or later engine build date I don't think you ever had pilot injection. In fact I think Ford got rid of it (in mfg) by 08/03. Then started flashing it out of existing engines.
My EGR valve accidentally became unplugged over 13,500 miles ago. No ill effects.
It is my personal opinion that the EGR valve serves no real purpose except as a as ill conceived stop gap compliance band aid for the the EPA emissions.
I can find no sane reason for introducing waste, regurgitated fuel, carbon deposits, and who knows what else to an already high tech very sensitive fueling system.
Again, it is my personal opinion that the EGR valve has been the demon behind many issues and many a Ford buy back.
Even some experience 6.0 techs (albeit under their breath) are suggesting that maybe the plug should fall off of troubled trucks.
I have not heard of the open EGR strategy until the couple of days. So I have no info for you there...I just know that wouldn't want to leave mine open.
We have some very talented techs that visit here so hopefully they will reply.
My EGR valve accidentally became unplugged over 13,500 miles ago. No ill effects.
It is my personal opinion that the EGR valve serves no real purpose except as a as ill conceived stop gap compliance band aid for the the EPA emissions.
I can find no sane reason for introducing waste, regurgitated fuel, carbon deposits, and who knows what else to an already high tech very sensitive fueling system.
Again, it is my personal opinion that the EGR valve has been the demon behind many issues and many a Ford buy back.
Even some experience 6.0 techs (albeit under their breath) are suggesting that maybe the plug should fall off of troubled trucks.
I have not heard of the open EGR strategy until the couple of days. So I have no info for you there...I just know that wouldn't want to leave mine open.
We have some very talented techs that visit here so hopefully they will reply.
Tuned
Joined: Sep 2001
Posts: 340
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From: Texas
I certainly hope some Diesel techs will chime in with their opinions on this subject as well.
I have disconnected my EGR and seen no ill effects after about 3k miles. The funny thing is that my first impression after the plug fell out was that the engine was quieter...certainly not louder. Some quieting strategy these guys came up with.
I have disconnected my EGR and seen no ill effects after about 3k miles. The funny thing is that my first impression after the plug fell out was that the engine was quieter...certainly not louder. Some quieting strategy these guys came up with.
Post Fiend
Joined: Apr 2004
Posts: 19,098
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From: Great State of Texas
As I mentioned, my EGR valve has been closed for quite a few miles. With that said, my idle noise varies also. Some days, I am amazed at how quiet it is. Other days it is as loud as you would expect it to be.
So much for the open EGR valve strategy huh?
So much for the open EGR valve strategy huh?
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From: Idaho
Originally Posted by kw5413
I can find no sane reason for introducing waste, regurgitated fuel, carbon deposits, and who knows what else to an already high tech very sensitive fueling system.
Any techs have some comments on the EGR and CCV modifications?
Thanks!
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This is probably an old topic for most, but I have been out of the loop for a while.Does anyone know of any action taken by the DSB to adress the loss of pilot injection? Has anyoneone gone past the dispute board into a law suit? I went through the board and was told there is no problem.