EGR system non existent?
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Senior User
Joined: Dec 2008
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From: Canada
EGR system non existent?
2001 F250 5.4 SD - 266000 KM
Hey folks I have gone high and low...and ive read somewhere else that another 5.4 owner DID not have a EGR valve etc.
I have looked EVERYWHERE, I follow the red vacuum lines two lead to the throttle body housing, 1 leaded to the right fuel rail...thats about it.
Anybody able to give me some insight on this issue?
Thanks
Matt
Hey folks I have gone high and low...and ive read somewhere else that another 5.4 owner DID not have a EGR valve etc.
I have looked EVERYWHERE, I follow the red vacuum lines two lead to the throttle body housing, 1 leaded to the right fuel rail...thats about it.
Anybody able to give me some insight on this issue?
Thanks
Matt
Mountain Pass
Joined: Dec 2007
Posts: 214
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From: Montreal
I've heard that not all of them had an egr system, don't know why. The egr valve is kinda hidden behind the throttlebody, on the drivers side. Check if you have a pipe exiting the top of your driver's exhaust manifold, if you do, follow it and it leads to the egr valve. If not, then you don't have one.
Senior User
Joined: Oct 2009
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From: Parlin NJ
not all 5.4l have the egr. i always thought i did on my truck and when i went to change the exhaust manifold on my truck i noticed i didnt have the egr pipe on the top of the manifold..i thought all trucks had them i guess not. my truck also is a 2001 f250 ext. cab and short bed with a 5.4L
Postmaster
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From: Wayyy NoCal, USA
On the V10's, the EGR seems to be "commonly" present only on the '99 model. Hit and miss in '00 and '01, I haven't heard of any in '02? But that's just my observation, not a known fact.
With really accurate fuel injection, they are not necessary to meet emissions standards so they are commonly eliminated to reduce manufacturing costs and warranty/replacement complaints and costs.
The only negative to eliminating is loss of fuel economy. At very low throttle positions on a big engine, EGR will provide a significant boost (like 5 to 10% in some cases) in mpg.
With really accurate fuel injection, they are not necessary to meet emissions standards so they are commonly eliminated to reduce manufacturing costs and warranty/replacement complaints and costs.
The only negative to eliminating is loss of fuel economy. At very low throttle positions on a big engine, EGR will provide a significant boost (like 5 to 10% in some cases) in mpg.
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Posting Guru
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no egr valve
First let me say I'm no expert, but from what i understand, newer vehicles with VVT variable valve timing does the job of an EGR system. VVT allows the exhaust valves to stay open slightly longer, overlapping the point at which the intake valve opens. This is accomplished by altering the position of the exhaust camshaft. With the exhaust valve partially open on the intake stroke, some exhaust gases are sucked back into the cylinder and reburned. This cools the combustion gases and does the same job as an exhaust gas recirculation valve.
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Postmaster
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From: SE Texas
First let me say I'm no expert, but from what i understand, newer vehicles with VVT variable valve timing does the job of an EGR system. VVT allows the exhaust valves to stay open slightly longer, overlapping the point at which the intake valve opens. This is accomplished by altering the position of the exhaust camshaft. With the exhaust valve partially open on the intake stroke, some exhaust gases are sucked back into the cylinder and reburned. This cools the combustion gases and does the same job as an exhaust gas recirculation valve.
JL
Postmaster
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From: SE Texas
This is also correct, and the SD 5.4L's did not all have EGR. It wasn't a required emissions device on vehicles of that weight class.
JL
JL
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Yeah, but you don't have to have a VVT engine to still get an EGR effect on a non-EGR engine. Simply increasing static camshaft overlap (decrease lobe separation) will create the same EGR effect but it also kills low-RPM torque and throttle response, which I'm sure everyone who drives a 5.4 knows about.
Postmaster
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From: SE Texas
Yeah, but you don't have to have a VVT engine to still get an EGR effect on a non-EGR engine. Simply increasing static camshaft overlap (decrease lobe separation) will create the same EGR effect but it also kills low-RPM torque and throttle response, which I'm sure everyone who drives a 5.4 knows about.
Unless you're referring to swapping the camshaft out on a stock 5.4L to an aftermarket piece with less LSA, then in that case, "everyone who owns a 5.4L" would NOT know about this.
JL
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How do you propose that you decrease lobe separation on the 5.4L? Even the VVT version only has a single camshaft with fixed lobes.
Unless you're referring to swapping the camshaft out on a stock 5.4L to an aftermarket piece with less LSA, then in that case, "everyone who owns a 5.4L" would NOT know about this.
JL
Unless you're referring to swapping the camshaft out on a stock 5.4L to an aftermarket piece with less LSA, then in that case, "everyone who owns a 5.4L" would NOT know about this.
JL
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From: SE Texas
JL