EGR Disconnect Issue/Question
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Laughing Gas
Joined: Feb 2011
Posts: 991
Likes: 6
From: Newberry Springs, CA
EGR Disconnect Issue/Question
Hi All,
Read in the tech folder about disconnecting the EGR valve on my truck ('06 F250 CC PSD) and thought I'd give it a try. Well, disconnected it (while off) and started the truck. I threw 2 soft codes for EGR level low but did not throw a CEL. Got in it this morning to drive it to the shop and got a CEL. Hooked up my scanner to it, rather than 2 codes I now have 4 (2 pairs of the same code, the original 2 and 2 more of the same.) I tried to clear it, but they didn't seem to want to clear.
So, I have 2 questions. First off, how do I clear the CEL?
Next, I noticed while driving to the shop that even under light throttle (accelerating to 45 say) I was running about a constant 10# of boost. Is this normal?
All insights and assistance is greatly appreciated.
Read in the tech folder about disconnecting the EGR valve on my truck ('06 F250 CC PSD) and thought I'd give it a try. Well, disconnected it (while off) and started the truck. I threw 2 soft codes for EGR level low but did not throw a CEL. Got in it this morning to drive it to the shop and got a CEL. Hooked up my scanner to it, rather than 2 codes I now have 4 (2 pairs of the same code, the original 2 and 2 more of the same.) I tried to clear it, but they didn't seem to want to clear.
So, I have 2 questions. First off, how do I clear the CEL?
Next, I noticed while driving to the shop that even under light throttle (accelerating to 45 say) I was running about a constant 10# of boost. Is this normal?
All insights and assistance is greatly appreciated.
Logistics Pro
Joined: Mar 2007
Posts: 4,604
Likes: 4
From: Claremore, OK
The '05 and up trucks will throw a "hard code" (CEL comes on) if the EGR valve is unresponsive or if there is no flow (blocked/removed) through EGR cooler. Now a custom tune will reduce the amount to time the EGR valve is open, and I ***think*** can tell the PCM to not look for flow in the EGR system. Thus you won't get codes or CEL. But I'm still running OEM tunes, so I don't know that for a fact.
Posting Guru
Joined: Dec 2012
Posts: 2,169
Likes: 3
From: SW Florida
https://www.ford-trucks.com/forums/9...egr-valve.html
if they are the same posts I saw a long time ago....at that time it was thought a good idea to disconnect the EGR valve electrical connector. Then Cheezit ran some tests and found otherwise. (Link above)
if they are the same posts I saw a long time ago....at that time it was thought a good idea to disconnect the EGR valve electrical connector. Then Cheezit ran some tests and found otherwise. (Link above)
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