My EGR valve is clogged, have questions - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 10-04-2014
LonesomeSTX's Avatar
Member
Thread Starter
 
Join Date: May 2013
Location: Columbus, GA
Posts: 150
My EGR valve is clogged, have questions

The 87 Ranger I recently acquired has a 2.9 and it ran really rough. I have found several possibilities but I have not put it back together yet. One thing I am addressing is the EGR valve. The port in the air plenum was so clogged I needed a half inch drill bit to clear it. It was clogged all the way through. I pulled the EGR valve off and it is in good shape, but was clogged and I cleaned it as well. Then I found the tube that runs from the exhaust manifold to the EGR valve is also completely clogged. I get what the EGR valve does and how it works. However, I do not see how all these parts can get so clogged. What would cause this, and what kind of problems will the truck have has a result? I have deleted mechanical EGR valves on old trucks like this before; but is it a good idea?
Reply With Quote
  #2  
Old 10-04-2014
RF Veteran
iTrader: (1)
 
Join Date: Jan 2014
Location: Vancouver, BC
Posts: 7,586
Engine was probably not serviced regularly.
i.e. changed oil, spark plugs and air cleaner.

These all effect efficient combustion, when it isn't as efficient you get carbon residue, that is what clogged EGR tube and valve.

EGR system is there to lower combustion chamber temperatures when engine is under load, not to reburn exhaust gases, lower temps reduces NOx emissions, side effect is engine won't ping with advanced timing on regular gas.
If you delete the EGR system your engine may ping/knock under load, on carb engines you could just run engine richer or retard timing.
On EFI engines the computer expects EGR system to be working so you may get pinging when accelerating or climbing hills, and may have to retard timing(so spark happens sooner), this reduces MPG and performance.
Reply With Quote
  #3  
Old 10-05-2014
LonesomeSTX's Avatar
Member
Thread Starter
 
Join Date: May 2013
Location: Columbus, GA
Posts: 150
Gotcha. I knew it could be done on older engines. I agree with the lack of maintenance. The previous owner did not understand such things.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
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
EGR valve Where is it located and how to clean gone ballistic 4.0L OHV & SOHC V6 Tech 14 11-14-2006 06:56 PM
EGR Valve Ranger808 2.9L & 3.0L V6 Tech 13 04-06-2006 07:16 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 09:26 AM.


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.