'01 4.6L getting EGR code P0401
Thread Starter
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Member
Joined: Aug 2009
Posts: 62
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From: San Antonio, Texas
I do not know where that much voltage could be coming from. Your pcm should be smoking.
Are all of your vacuum lines still connected. Like the brake booster, the PCV, the one from the left valve cover to the intake under the throttle body?
So there are no lean codes.p0171 or 174.
Are all of your vacuum lines still connected. Like the brake booster, the PCV, the one from the left valve cover to the intake under the throttle body?
So there are no lean codes.p0171 or 174.
only code is 401 and all vac lines connected
Senior Member
Joined: Sep 2007
Posts: 1,512
Likes: 1
From: >wwOwww<
Doesn't look like you have any vacuum leaks.
Was there some loose carbon in the throttle body, or did you clean the whole thing?
What was measured differently? When it measured .01-.02 was the engine running?
I'm confused.
Was there some loose carbon in the throttle body, or did you clean the whole thing?
I'm confused.
Thread Starter
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Member
Joined: Aug 2009
Posts: 62
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From: San Antonio, Texas
I thought I got everything out (carbon) I used a whole can of B12 and part of Deep Creep
Senior Member
Joined: Sep 2007
Posts: 1,512
Likes: 1
From: >wwOwww<
If the diaphragm on the valve isn't leaking, and vacuum didn't change the engine rpm. The ports have to be stopped up.
You can buy stem at the parts store to actually push through the ports, to make sure they are well open.
It think I would take the valve off and check it visually before I took the throttle body off.
Some residue from the chemicals could have ruined it.
Sorry I'm not more help. These Ford systems are picky, I've had plenty of problems, and some people never have any. But going back to your original picture of where the DPFE was when you bought the truck, I'd say someone has had plenty problems with it.
You can buy stem at the parts store to actually push through the ports, to make sure they are well open.
It think I would take the valve off and check it visually before I took the throttle body off.
Some residue from the chemicals could have ruined it.
Sorry I'm not more help. These Ford systems are picky, I've had plenty of problems, and some people never have any. But going back to your original picture of where the DPFE was when you bought the truck, I'd say someone has had plenty problems with it.
Thread Starter
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Member
Joined: Aug 2009
Posts: 62
Likes: 0
From: San Antonio, Texas
If the diaphragm on the valve isn't leaking, and vacuum didn't change the engine rpm. The ports have to be stopped up.
You can buy stem at the parts store to actually push through the ports, to make sure they are well open.
It think I would take the valve off and check it visually before I took the throttle body off.
Some residue from the chemicals could have ruined it.
Sorry I'm not more help. These Ford systems are picky, I've had plenty of problems, and some people never have any. But going back to your original picture of where the DPFE was when you bought the truck, I'd say someone has had plenty problems with it.
You can buy stem at the parts store to actually push through the ports, to make sure they are well open.
It think I would take the valve off and check it visually before I took the throttle body off.
Some residue from the chemicals could have ruined it.
Sorry I'm not more help. These Ford systems are picky, I've had plenty of problems, and some people never have any. But going back to your original picture of where the DPFE was when you bought the truck, I'd say someone has had plenty problems with it.
I appreciate all your help Tumba
as well as the other s as well. jbrew and you have been very helpfull in finding out what the problem is not and educating me as well. All the diagrams and info are safely tucked away in my photo album for future use or assist to someone else.
This other cleaner you speak of, Stem, who is it made by? Is it a spray or a soaker or... what?
Thread Starter
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Member
Joined: Aug 2009
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From: San Antonio, Texas
Well back to the drawing board. Maybe I can get some compressed air, spray some B12 in the egr ports, let it soak and blast the hell out of it with air thru the egr valve channel to the ports!! Blow that crap out of there!!
YEAH BABY!! 
Senior Member
Joined: Sep 2007
Posts: 1,512
Likes: 1
From: >wwOwww<
AHHHH.... stems = pipe cleaners. Gotcha.
Well back to the drawing board. Maybe I can get some compressed air, spray some B12 in the egr ports, let it soak and blast the hell out of it with air thru the egr valve channel to the ports!! Blow that crap out of there!! YEAH BABY!!
Well back to the drawing board. Maybe I can get some compressed air, spray some B12 in the egr ports, let it soak and blast the hell out of it with air thru the egr valve channel to the ports!! Blow that crap out of there!!
YEAH BABY!! 
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
When did you install the 24 volt system
Yea, somethings not right.
I think you should set the Haynes book down for a sec, -pretend it doesn't exist and start over lol. - Just think your confusing yourself, and me lol.
Follow the outline Tumba linked you to,- and compare. thumbsup:
Last edited by jbrew; Aug 13, 2009 at 06:23 AM.
