EGR Question Again
Posting Guru
Joined: Dec 2006
Posts: 1,078
Likes: 0
From: Kansas City/Breckenridge
I believe the Cooler can still cause issues with just the hoses bypassed. Not positive on this.
Also keep in mind unplugging the valve will put the turbo in to limp mode. You'll need a custom tuner to conquer this.
There are a lot of home brewed EGR delete kits just do a search and you'll get some idea about what other people have done.
Also keep in mind unplugging the valve will put the turbo in to limp mode. You'll need a custom tuner to conquer this.
There are a lot of home brewed EGR delete kits just do a search and you'll get some idea about what other people have done.
Cargo Master
Joined: Mar 2007
Posts: 3,103
Likes: 32
From: AB/BC
Unplugging the valve traps the hot exhaust in the cooler so unless you block the flow to the cooler your asking for a burst cooler when towing. I have heard of this limp mode with the turbo unplugged but don't seem to suffer the effects.I can hit 32 lbs of boost on stock tuning without a egr valve in my truck.I wonder why,is it a 05 and up thing I wonder.
Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
Unplugging the valve traps the hot exhaust in the cooler so unless you block the flow to the cooler your asking for a burst cooler when towing. I have heard of this limp mode with the turbo unplugged but don't seem to suffer the effects.I can hit 32 lbs of boost on stock tuning without a egr valve in my truck.I wonder why,is it a 05 and up thing I wonder.
Cargo Master
Joined: Mar 2007
Posts: 3,103
Likes: 32
From: AB/BC
When I unplugged my egr valve I had a hard time getting the truck to boost 26 psi. With it plugged in I can hit just about 30psi. I was looking for the difference with it plugged in and not plugged in (an experiment...lol). Some people have said they don't notice any difference... I could even feel the loss of top end performance.
Logistics Pro
Joined: Sep 2006
Posts: 4,863
Likes: 4
From: Airdrie Alberta
I only hit about 24psi with my EGR unplugged, I do not want to plug it back in right now though. I am thinking about getting a dummy valve though just for the turbo cycling that having the EGR plugged in gives you. Mine is an 03
Thread Starter
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New User
Joined: Jan 2009
Posts: 7
Likes: 0
From: Lakeside
So even if you bypass the the coolant flow to the cooler, if you unplug it there is a loss of boost?
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Elder User
Joined: Jun 2008
Posts: 724
Likes: 2
From: Sarasota, fl
I'm asking, because the EGR cooler on the front end connects to the intake manifold with 2 bolts, that's the recirculated Exhaust gas IN side to the intake, and there is a nipple on it - that's the coolant side, what also connects to the intake manifold. I have no idea how you planning to do the coolant bypass leaving the EGR cooler in place.....
If you're talking about the block off/ bypass, that's a different story. That does not bypass the coolant from the EGR cooler, that blocks the exhaust gas from the EGR cooler. If you choose that, you don't have to remove the EGR valve, you don't have to unplug it either, there is no exhaust gas flow in the cooler anymore. You only can do this, if your EGR cooler isn't leaking internally, and you have an 03-04 truck. Newer models have exhaust gas restriction scoop in the up pipe, that needs some modification too.
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Logistics Pro
Joined: Sep 2006
Posts: 4,863
Likes: 4
From: Airdrie Alberta
Unfortunately we need the coolant to continue on this through this line, it goes through the egr cooler into the oil cooler I believe, so it is a necessary route for the coolant. If it were as easy as just cutting and plugging a line, a lot more of us would have this done already I'm sure.
Elder User
Joined: Jun 2008
Posts: 724
Likes: 2
From: Sarasota, fl
There is no way to just unplug a hose, and reroute it. Just like Rollerstud said, a lot of us would have that done. Search in to EGR delete/bypass, you'll find your answer for the easiest way for you. IMO just unplug the EGR valve won't really do anything positive for your truck, because you could do more damage with the trapped hot exhaust, just like Brickie mentioned a few posts ago....
Tuned
Joined: Jul 2006
Posts: 311
Likes: 6
Also keep in mind unplugging the valve will put the turbo in to limp mode. You'll need a custom tuner to conquer this.-------What happens exactly when turbo goes into limp mode???
we need the coolant to continue on this through this line, it goes through the egr cooler into the oil cooler -------coolant gets heated up by the oil cooler then goes to egr cooler where it typically get flash boiled causing puking etc
I have my EGR completely deleted (egr valve hole, egr cooler "cooled" exhaust hole welded shut and a hose/welded pipe tube from oil cooler to the intake manifold where flash boiled water from egr cooler used to go) I have a check engine light with P0403/5 codes. When I get time I am going to splice wires into the EGR valve plug so I can plug my EGR valve back in to try to get rid of these codes. Because of my regulated return the EGR valve wiring harness won't reach the valve.
we need the coolant to continue on this through this line, it goes through the egr cooler into the oil cooler -------coolant gets heated up by the oil cooler then goes to egr cooler where it typically get flash boiled causing puking etc
I have my EGR completely deleted (egr valve hole, egr cooler "cooled" exhaust hole welded shut and a hose/welded pipe tube from oil cooler to the intake manifold where flash boiled water from egr cooler used to go) I have a check engine light with P0403/5 codes. When I get time I am going to splice wires into the EGR valve plug so I can plug my EGR valve back in to try to get rid of these codes. Because of my regulated return the EGR valve wiring harness won't reach the valve.
Fleet Mechanic
Joined: Oct 2007
Posts: 1,712
Likes: 18
From: Henderson, NV
If your oil cooler isn't plugged up restricting the flow of coolant to the egr cooler you probably will be fine. A coolant bypass filter will help prevent a plugged oil cooler. One of the main killers of the egr cooler is when the oil cooler restricts the flow of coolant to the egr cooler. Coolant still flows but not as freely as it should, allowing what little coolant inside to boil in the egr cooler. This weakens the weld spots inside the egr cooler which eventually causes failure. This is information I have read throughout the past year on this great site. A blown egr cooler is a symptom of a restrictive oil cooler (most common).... fix the problem and prevent other failures.
