Something new ??
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Laughing Gas
Joined: Aug 2010
Posts: 1,098
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From: Ventura co.
Something new ??
It Has been a little colder than normal. It got down to 35/39 for a couple of nights. The other day I started my truck and it starts fine. medium idle like always. I walk out to the street and a whooshing sound start's out of the exhaust.
I tapped the peddle as it has done this before and it's gone. truck is running for about 4 or 5 minutes when the whooshing starts and i tap the peddle.
Ok now as i walk out to my trailer less than a couple of minutes, my truck idle's up. It has never done this before the whole 6 years i have owned it. Even when i stay at my sisters house where it had snowed over night.
I had shut it off and restarted it, starts fine and as i walk away it idles up again. I don't have a high idle on my DP. It Has not done it sense ?
Is this a normal thing in colder weather ?
Thank's Phil
I tapped the peddle as it has done this before and it's gone. truck is running for about 4 or 5 minutes when the whooshing starts and i tap the peddle.
Ok now as i walk out to my trailer less than a couple of minutes, my truck idle's up. It has never done this before the whole 6 years i have owned it. Even when i stay at my sisters house where it had snowed over night.
I had shut it off and restarted it, starts fine and as i walk away it idles up again. I don't have a high idle on my DP. It Has not done it sense ?
Is this a normal thing in colder weather ?
Thank's Phil
Posting Guru
Joined: Aug 2009
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From: ellensburg
Yes. Dont quote me but I believe when the PCM reads oil temp a certain temp along with air intake temp being within a certain range, it will automatically high idle. Same thing as a high idle tune, only its automatic. PCM returns it to normal idle speed as soon as the break gas or clutch is touched.
Hotshot
Joined: Jan 2011
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From: Puget Sound
Posting Guru
Joined: Jun 2002
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From: Panama City, Fl
Such a great place to read things at..... Same thing going on with mine and being my first diesel, I was concerned. Was going to post a question about that exhaust noise. First time I heard if....I thought the thing was going to launch into space. lollol
Does this only happen when the outside weather is cold or is it normal at any outside temp if the engine is cold?
Does this only happen when the outside weather is cold or is it normal at any outside temp if the engine is cold?
PREMIUM SPONSOR
Joined: Dec 2012
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From: Oakdale, CA
Completely normal...
The EBPV is activated when ambient air temperature is below 7°C (45°F) and engine oil temperature is below 75°C (167°F) during low load. At high load, high speed conditions, the back pressure system is disabled.
The higher idle is normal too.
The EBPV is activated when ambient air temperature is below 7°C (45°F) and engine oil temperature is below 75°C (167°F) during low load. At high load, high speed conditions, the back pressure system is disabled.
The higher idle is normal too.
Freshman User
Joined: Jan 2013
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I have same prob. But I get it when I'm driven down the road also. If I just keep a steady speed it makes the hissing sound out the exhaust. But if I let off or increase the gas it goes away. What would that be
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Post Fiend
Joined: Sep 2003
Posts: 6,096
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From: Mesa AZ
Same thing. Should go away once the engine warms up a bit.
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Greg, I was going to ask you about the EBPV on our F450's.... My Excursion you can hear it close, it does it all the time when it is cold out and it is first started.
I fired off my F450 Friday morning, there was ice on the windshield and I never heard the EBPV close.... it doesn't matter whether the park brake is off or on, the only time I have heard it was when we ran your AE on it... so I know it works.
I fired off my F450 Friday morning, there was ice on the windshield and I never heard the EBPV close.... it doesn't matter whether the park brake is off or on, the only time I have heard it was when we ran your AE on it... so I know it works.
Hotshot
Joined: Jan 2011
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From: Puget Sound
Posting Guru
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You can start by cleaning your EBP sensor and tube. Be careful, removing either of these can damage them if you don't use two wrenches to counter the torque.
Opposite sides of the same problem. As I read and understand this, the EBPV can be effected by the Air Intake Temperature, the Engine Oil Temperature, the Exhaust Back Pressure Sensor, the functionality of the Exhaust Back Pressure Valve, or the tune.
Opposite sides of the same problem. As I read and understand this, the EBPV can be effected by the Air Intake Temperature, the Engine Oil Temperature, the Exhaust Back Pressure Sensor, the functionality of the Exhaust Back Pressure Valve, or the tune.
Hotshot
Joined: Jan 2011
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From: Puget Sound
Posting Guru
Joined: Aug 2010
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update....
It was 30* this morning, the X closed the EBPV after about 60 seconds of idle time and then went into High idle... around 1000rpms. Guess the Superchips didn't do anything to that...
Freshman User
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[QUOTE=Tugly;12707411][FONT=Georgia]You can start by cleaning your EBP sensor and tube. Be careful, removing either of these can damage them if you don't use two wrenches to counter the torque.
Ok thanks for the advice. Ill start by doin that an see what happens. Anything that I should look for while I'm in there or just clean it?
Ok thanks for the advice. Ill start by doin that an see what happens. Anything that I should look for while I'm in there or just clean it?