Egr problems - Ranger-Forums - The Ultimate Ford Ranger Resource


DOHC - 2.3L Duratec / Mazda L Engines Discussions and Topics specific to the Duratec 4 cylinder engines

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 12-28-2015
Member
Thread Starter
 
Join Date: Dec 2015
Location: Dallas texas
Posts: 2
Egr problems

Recently my 03 ranger with the 2.3 dohc's CEL came on. About 2-3 weeks ago I had a code for a misfire on startup which I got to go away by doing plugs and wires, this may or may not be relevant. This time the code was for insufficient egr flow, I did some reading and found that that is often caused by the dpfe sensor, so I wanted to check that out before I replaced egr. I do plan on pulling the egr and cleaning it regardless it's just been too wet. Anyway, Im not sure if I have the dpfe. Or I just can't find it. I think the 2003 has a different than typical egr according to my manual. I don't think I I have the tube from exhaust to egr I think they redesigned it (so i cant trace the dpfe vac lines that usually come from here but I'm not sure because I can't find any real information. I've heard from some people that I don't and from some that I do. So I guess my question is do I have a dpfe sensor and if I do where the heck is it? I've looked from every angle I could and moved stuff around and traced hoses and wires and I cannot find it. I can't figure out if it's on the intake manifold or the firewall or anything really. So any suggestions would be great.
Reply With Quote
  #2  
Old 12-28-2015
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,577
DPFE doesn't use vacuum hoses.

DPFE will have 2 hoses but they are exhaust hoses, one close to EGR valve, one farther away from EGR valve on the exhaust manifold.
The DPFE sensor reports the pressure difference between the 2 hoses to the computer.
If EGR valve is open the hose closest to the EGR valve will have lower pressure than the one farther away, the bigger the difference the more the EGR valve is open.

But you don't have one of those on the 2.3l Duratec

It uses a stepper motor, like the IAC valve does.
EGR valve and stepper motor are one unit, so are replaced as an assembly.
Computer sends a "step" command to motor and EGR valve opens 05 degrees, another step opens it 10 degrees, ect...
So check connector on EGR valve
Reply With Quote
  #3  
Old 12-28-2015
Member
Thread Starter
 
Join Date: Dec 2015
Location: Dallas texas
Posts: 2
Quote:
Originally Posted by RonD View Post
DPFE doesn't use vacuum hoses.

DPFE will have 2 hoses but they are exhaust hoses, one close to EGR valve, one farther away from EGR valve on the exhaust manifold.
The DPFE sensor reports the pressure difference between the 2 hoses to the computer.
If EGR valve is open the hose closest to the EGR valve will have lower pressure than the one farther away, the bigger the difference the more the EGR valve is open.

But you don't have one of those on the 2.3l Duratec

It uses a stepper motor, like the IAC valve does.
EGR valve and stepper motor are one unit, so are replaced as an assembly.
Computer sends a "step" command to motor and EGR valve opens 05 degrees, another step opens it 10 degrees, ect...
So check connector on EGR valve
Alright thanks, that's what I needed.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
'92 2.3L running rich, poor mpg: EGR problems? napjerk SOHC - 2.3L & 2.5L Lima Engines 0 03-01-2012 05:33 PM
Want to Buy: PIC: Metal egr tube from the egr to the manifold 97 ranger 6cyl 5spd - NJ skillzo1 Engine & Drivetrain 5 01-17-2012 02:27 PM
Swapping no EGR engine for EGR engine jmshanafelt 4.0L OHV & SOHC V6 Tech 0 06-22-2011 09:20 PM
EGR vs No EGR any real difference? Nestromo 4.0L OHV & SOHC V6 Tech 9 09-22-2010 11:51 AM
What would cause problems with an EGR system? HRoc 2.9L & 3.0L V6 Tech 4 07-11-2007 07:25 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -6. The time now is 11:04 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.