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How to clean egr tube without removing it

Carbon buildup

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 14 Answers

SOURCE: "Service engine soon" light still on

Most EGR codes will need to be reset with a scanner after corrective action and will not clear on their own.
Hope this helps some.

Posted on Dec 17, 2008

FoRdMaStEr
  • 51 Answers

SOURCE: no vacuum to egr valve

there is an EGR vacuum solenoid somwhere that controls on/off vacuum to actuate the valve. i am not to sure of the location, but follow the vacuum line back from the egr until you find a device that looks like an electrical check valve for vacuum. that is a possibilty. but then again i am a ford,chrysler guy and am just giving you an answer based on my understanding of the functuality of a vacuum egr system

Posted on Jan 15, 2009

daves944
  • 1050 Answers

SOURCE: i just want to clean my egr valve and hose in my 2000 acura tl.

You asked for it, you got it! This is as good as it gets:

http://www.acuraworld.com/forums/f40/diy-egr-intake-manifold-cleaning-68465/

Posted on Mar 19, 2009

5LTRBTR
  • 180 Answers

SOURCE: I have a 01 beetle tdi with 100k miles on it. It

sounds like another bad maf sensor or the turbo is sticking

Posted on Jun 30, 2009

pugwash814
  • 377 Answers

SOURCE: Lack of power, exhaust smoke and engine miss

Just an idea but the Ford Mondeo ( european car ) from which I believe your engine
is taken has a habit of splitting a low pressure tube at the back
of the engine this is a relatively
cheap, easy fix. The other symptom this used to throw up was a
little more black smoke from the exhaust and a pacing/ surging from
the engine.

Posted on Mar 27, 2010

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1 Answer

My chev suburban runs rough and has hesitation warm or cold engine. what might be the problem? egr value? i had a p1404 code?


code 1404 is exhaust gas recirculation system valve 2 need to test ur egr valve and tube --check receiving proper vacuum[check vacuum lines for leaks] remove and check valve 4 proper movement as well as clean off carbon buildup[usually the problem carbon causing valve to stick]

Jun 09, 2010 | 1999 Chevrolet Silverado 1500

2 Answers

What does a PO401 means for a 1998 Mercury Sable


P0401 OBD-II Trouble Code - Insufficient EGR Flow

What does that mean?
EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emmissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

Symptoms
You may notice drivability problems such as pinging (a.k.a. pre-ignition knock) when the engine is under load or the vehicle is at higher speeds. There may also be other symptoms.

Causes
A code P0401 most likely means one or more of the following has happened:
* The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
* There is a blockage in the EGR (tube), most likely carbon buildup
* The EGR valve is faulty
* The EGR valve may not be opening due to a lack of vaccuum

Possible Solutions
In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
* Use a vacuum pump and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticable difference in RPM's with the EGR open
* Clean out the EGR valve and/or tubing to remove deposits
* Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
* Replace the DPFE sensor (with a good quality / OEM one)
* Replace the EGR valve

Hope this help to solve it; remember comment and rated this help. TY for using Fixya.

May 06, 2010 | 1998 Mercury Sable

1 Answer

PO403 EXHAUST GAS RECIRCULATION CIRUIT/PO507 IDLE CONTROL SWITCH


Locate the EGR valve life sensor.

Check for damage or dirt that can prevent sensing / follow the EGR lift /movement.

=====

Import car has small EGR and small EGR passage tube.

Carbon will build up under the EGR and inside the passage tube.


Order a new EGR base gasket and start cleaning / soaking the carbon buildup with WD-40.


This is a time consuming task.


Call all the carbon off and re-install the EGR valve.


Reset the can and take it for a test drive.


PLEASE RATE MY ANSWER if it's helpful to you.


Thanks

MUSTGO.

Dec 11, 2009 | 2002 Hyundai Santa Fe

2 Answers

Getting egr code 401


EGR stands for Exhaust Gas Recirculation. It is part of the vehicle emissions system, and is used to reduce combustion temperature and pressure to control Oxides of Nitrogen. There are generally three parts to the EGR system: the EGR valve, an actuator solenoid, and a differential pressure sensor

EGR (DPFE). These things work together to deliver the correct amount of recirculation based on engine

temperature, load, etc. The P0401 code means that OBD detected an insufficient amount of EGR.

A code P0401 most likely means one or more of the following has happened:
· The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
· There is a blockage in the EGR (tube), most likely carbon buildup
· The EGR valve is faulty
· The EGR valve may not be opening due to a lack of vacuum

In fixing this code, it is quite common for people to just replace the EGR valve only to have the OBD code return. The EGR valve is not always the culprit.
  • Use a vacuum pump
and pull the EGR valve open while monitoring engine RPM's & DPFE voltage. There should be a noticeable difference in RPM's with the EGR open
  • Clean out the EGR valve and/or tubing to remove deposits
  • Check the voltage at the DPFE, compare to specified values (refer to a repair manual for your specific model)
  • Replace the DPFE sensor (with a good quality / OEM one)
  • Replace the EGR valve

Nov 22, 2009 | 1993 Saturn SC2

1 Answer

I have a code of lowair flow egr valve and have changed to valve and cleaned the throttle body housing with cleaner. servie engine light still comes on with the same default but not all the time.


Hello! This is a somewhat common issue where there is an excessive buildup of carbon in the EGR port in the upper intake manifold.
This is the EGR Valve as removed from the engine:

52a1105.jpg
On your vehicle, you will notice that the flexible tubes are held in place by one bolt each. If you remove these tubes from the engine side only - you will be able to clean inside the port that they connect to. I have had good luck using a parts cleaner that any Chrysler dealership sells - it makes short work of carbon build up. Once you have the ports cleaned out - reassemble the EGR tubes to the intake. Be sure to get them seated fully before you tighten them back down.


Hope this helps and good luck!

Sep 25, 2009 | 2002 Pontiac Grand Prix

4 Answers

Emission inspection report list a code 401 as the problem.where should i start to correct the problem


Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

Sep 24, 2009 | 1996 Ford F150 Regular Cab

2 Answers

OBD inspection: 1 trouble code reported:P0401 EGR Flow Insufficient Detected: This is a 200 Olds silhouette. Is this an easy fix?


Yes and know,it all depends on your experience with tools but you can do it if your follow instructions and take your time. I'll try to help you save some money and let you know that you can fix thins your self. 
A code P0401 most likely means one or more of the following has happened:
  • The DPFE (differential pressure feedback EGR) sensor is faulty and needs to be replaced
  • There is a blockage in the egr (tube), most likely carbon buildup
  • The egr valve is faulty
  • The egr valve may not be opening due to a lack of vaccuum
So we are going to remove the egr valve and clean it out with Carb cleaner, remove all the carbon build up that is binding the valve. If that doesn't not work or you thing there is too much carbon or the valve it self is still binding once it's cleaned, then just replace it. The other thing to is to replace the DPFE sensor but were just going to worry about the egr first since that is what is most common and a good cleaning will always almost fix the problem. 
There is one bolt that holds the egr tube to it and two bolts that hold it to the intake manifold take them out, unplug the electrical connector and its off.  Once the egr is off, Spray it clean with Carb cleaner and make sure that there are no moving parts are binding and re-install. If needed replace the old gasket with a new one. Good luck and hope this helps and if your not sure where the egr valve is, it's just behind the throttle body. Good luck and hope this helps, Auto Zone can also give you the step by step instructions to getting the job done and you can also buy the replacement egr valve. But start with the cleaning first. 

Jul 20, 2009 | 2000 Oldsmobile Silhouette

3 Answers

1997 pontiac grand prix se has code po401. I


Check for

vacuum leaks on intake manifold,

the air tube between the air filter.

intake manifold vacuum hose.

===
clean throttle plate with Berryman carburator cleaner

SEE sample picture HERE
===

Also remove carbon built up behind the EGR valve and the EGR passage tube.

===

Vacuum leak WILL offset the intended 14.7 to 1 air fuel ratio.

More un-metered air (leaks) will lean out the fuel mixture.

Use small amount of Berryman carb clearer at potential air leak area will help you identify trouble spot.

At idle,just spray and listen for the RPM surge.

The in-rush of carb clearer will increase the RPM on the motor.

Record the problem spot(s) and address it later.

===

EGR carbon built up require 2+ hours to clean from start to finish.

You will need a new EGR base gasket before your start.

Locate and remove the EGR valve after the vehicle is cool down.

Carefully record the connector and vacuum line (for older vehicle) location by drawing an easily to follow diagram.

Remove the EGR valve.

Inspect the location of the carbon built-up inside the valve and the EGR passage tube.

SOAK these areas with WD-40 spary.

You will need a small screwdriver,cloth hanger and lot of newspaper and time to get this cleaning done right.

RE-SOAK the carbon and let it sit for over-night will also help.

One the last round,pass a shop vacuum of the EGR valve and the passage pipe.

Install the new EGR gasket and connectors.

Allow the vehicle to warm up outdoor to burn up any remaining WD-40.


Take it for a test drive.


Please rate my answer if it's useful to you.


Cheers,

Mustgo

Jun 30, 2009 | 2002 Ford Explorer

3 Answers

Egr code put two new egr vlvs on it still get code


remove the egr valve take a piece of clothes rack or a tiny tiny screw driver carefully clean out carbon in the intake port hole on the intake.the carbon blocking off the egr valve.so it cant work properly.after cleaning carbon clean up the debris and go from there.

Jun 25, 2009 | 1997 Ford F150 Regular Cab

2 Answers

Egr code set mil light replaced egr valve light stayed off for about 30 miles and is now back on for egr valve. what should I look for?


my mechanic hooked a long spring to a drill and used it to clean out the EGR tube. now i don't have the problem any more

Sep 23, 2008 | 1998 Suzuki Sidekick

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