Could delete cause a limp mode?
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Could delete cause a limp mode?
I'm going to do a weld-in-plug delete in my RV in the next couple weeks, and its a crapshoot apparently if it'll throw a code. My immediate concern is I want to go on a trip right after, and I won't have time to fiddle about getting an SCT tuner to turn the code off. What I definitely don't want is a code for EGR flow restriction to eventually cause my motor to go into some kind of limp mode while I'm in the middle of a long drive. Anyone know if this is possible?
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From: S.W Ohio
I'm going to do a weld-in-plug delete in my RV in the next couple weeks, and its a crapshoot apparently if it'll throw a code. My immediate concern is I want to go on a trip right after, and I won't have time to fiddle about getting an SCT tuner to turn the code off. What I definitely don't want is a code for EGR flow restriction to eventually cause my motor to go into some kind of limp mode while I'm in the middle of a long drive. Anyone know if this is possible?
It will not go into a limp mode... It will how ever give you a check engine light... Also don't unhook the egr valve, it will effect your cooling fan..
Fleet Mechanic
Joined: Nov 2008
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From: South Alabama
^^^^^ what he said x2 . I've had the welded delete on my 2006 for about 2 years. No limp, yes nagging light, and you can block off the EGR port and leave the EGR laying on engine plugged in for fan control.
Postmaster
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From: NW IA
Stupid question I know, but what causes the light if the valve is left either in place or laying up top still hooked up?
Flow?
Asking because I know a guy who wants to delete his 05 EGR cooler.
I thought I read somewhere that earlier 05's did not trigger a light. I realize this might be BS but I do remember a thread that someone claimed it depended on the location of the EBP sensor.
Flow?
Asking because I know a guy who wants to delete his 05 EGR cooler.
I thought I read somewhere that earlier 05's did not trigger a light. I realize this might be BS but I do remember a thread that someone claimed it depended on the location of the EBP sensor.
Fleet Mechanic
Joined: Nov 2008
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From: South Alabama
Mike, I've wondered that my self. I hear its flow and temperature. I wish a brainiac would figure out how to modify the valve to over look turning on the code. 87crewdually just did a comment on another thread about flow and temperature. I always figured flow but didn't think about temperature.
Edit; haven't heard about location of EBP sensor.
Edit; haven't heard about location of EBP sensor.
Fleet Mechanic
Joined: Nov 2008
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From: South Alabama
On the 6.7 forum and the 150 forum the guys are writing code and modifying ForScan software to do a lot of things. I know their trucks are set up differently with different modules for different things. I wonder if it could be modified to keep the EGR engine light off. Yea I know. Get my lazy a** over there and ask them. 
Cargo Master
Joined: Jun 2007
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From: Roseburg, OR
Stupid question I know, but what causes the light if the valve is left either in place or laying up top still hooked up?
Flow?
Asking because I know a guy who wants to delete his 05 EGR cooler.
I thought I read somewhere that earlier 05's did not trigger a light. I realize this might be BS but I do remember a thread that someone claimed it depernded on the location of the EBP sensor.
Flow?
Asking because I know a guy who wants to delete his 05 EGR cooler.
I thought I read somewhere that earlier 05's did not trigger a light. I realize this might be BS but I do remember a thread that someone claimed it depernded on the location of the EBP sensor.
I believe it is Flow.
My 05 with a build date one 2/2005 does not trigger a CEL for low flow. Not sure about the EBP sensor location for others but mine sits back about mid way on the engine and attaches to the exhaust manifold.
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Lead Driver
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From: So. Jersey
What happens is the PCM will command EGR to open. Then it monitors PIDS such as intake temp sensor #2 and looks for an increase since hot gases are coming in. If it indicates low EGR flow by no increase in temperature when commanded open then the light pops on and you have a stored code.
That's it in a nutshell.
And to add, I see no reason to remove the EGR solenoid. Once the cooler is slug closed both ends or eliminated it cannot cause any harm.
That's it in a nutshell.
And to add, I see no reason to remove the EGR solenoid. Once the cooler is slug closed both ends or eliminated it cannot cause any harm.
Cargo Master
Joined: Jun 2007
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From: Roseburg, OR
Me either, I can't see pulling the valve just to leave in plugged in and laying in the valley for what, a shiny block off plate?
Lead Driver
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From: So. Jersey
Exactly. But if someone has a valid thought out explanation I'm all ears.
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Thanks! That's good news, I shouldn't worry about that part then. And yes, will keep the EGR hooked up/plugged in. Seems odd that apparently the only reliable way to turn the CEL off is with an expensive SCT Tuner. I wonder if a shop could turn it off and it would stay off. Someone said that it only has to be done once, but I'm not sure. Wouldn't want the nuisance of having it come on again.
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Just a wild quess, but I suppose if one disconnected such a sensor the 'default' would be for the CEL to come on anyway?
Cargo Master
Joined: Jun 2007
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From: Roseburg, OR
Disconnecting the EGR valve doesn't set a CEL for mine. I'm not sure about the EBP sensor, never tried that.
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