Question about 1994 Cadillac Seville

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How to install an EGR Valve

Vehicle is vibrating and rough running when accelerating from stop.

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The EGR valve is usually on the left side, round and is held on with 2 half inch bolts. Either has a vaccum line or a 2 prong plug going to it.

Posted on Apr 18, 2014

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Posted on Jan 02, 2017

Buschchris1
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SOURCE: no egr flow after reaching operating temp

use an OBD II reader, $60 at Walmart.

Also try cleaning out your air intake. Carbon buildup can cause rough idle and hesitation. Run two or three cans of throttle cleaner through it, clean out the pathways from the EGR to the intake, put two shots of the LUCAS brand fuel system cleaner in it or SEAFOAM.

If it improves then there you go. If not, you may have other issue, take it to a mechanic or have a gearhead friend take a look.

The OBD will tell ou if theres any engine codes going off caused by something wrong.

use the Carb cleaner/Intake cleaner by removing the the air intake hose to the air box, use one hand to increas the throttle whiile spraying the cleaner through it. Make sure to rev it enough to keep it from stalling, bu tnot too much.

If you start seeing smoke come out your tailpipe, then you have carbon buildup.

If unsure about any of this. I suggest you make friends with a guy or gal that knows about cars, buy em a six pack and ask them what they think about it, eventually they wont be able to stop themself from helping you.

Good luck

Posted on Jun 17, 2008

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2 Answers

Where is the egr valve on a 99 Ford expedition


The EGR valve is in a very difficult spot to work on. If the EGR is bad it will set off the check engine light and make the vehicle run rough or stall at idle. It really doesn't make it run rough while driving or accelerating. What are the conditions when the car runs rough?

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I have subaru legacy model 2010 .i have frequent the engine stops when i am breaking to slow down in a trafic jam,the car vibrate showing engine stops if i press on the accelerator the motor will resu


Could be bad EGR valve or vacuum leak. Egr valve, depending on whether it is stuck open or closed can act like the old choke thermostats on the carburator system making the vehicle run and idle rough when it is cold OR hot but normally only one or the other. Will run fine cold but rough once it's hot or rough when cold and fine when hot. Check or have someone check for any trouble codes in the system. It can hold codes and not make the check engine light come on and may help diagnose the problem.

Jan 12, 2013 | Cars & Trucks

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Rough idle vibrates and po171 code service engine soon. jamesrowland9@aol.com


Hi, a Ford P0171 is a LEAN code for cylinder bank 1, and P0174 is a LEAN code for cylinder bank 2. These codes commonly occur on many Ford vehicles, and are set when the powertrain control module (PCM) sees the air/fuel mixture is running too lean (too much air, not enough fuel).
When the Check Engine Light comes on, either one of these codes, or both, may be found when a code reader or scan tool is plugged into the vehicle diagnostic connector. IF the vehicle is driven long enough, typically both codes will be set.
A P0171 lean code for bank 1 is the cylinder bank on the RIGHT (passenger) side of the engine on Ford vehicles with a V6 or V8 engine and rear-wheel drive.


A lean fuel condition may exist if the engine is sucking in too much air and/or the fuel system is not delivering enough fuel. If bad enough, a lean fuel condition may cause lean misfire, a rough idle, hesitation or stumble when accelerating, and/or poor engine performance.
Unmetered air can enter the engine through a vacuum leak, a dirty airflow sensor that is not reading airflow accurately, an EGR valve is not closing and is leaking exhaust into the intake manifold, an EGR valve that is allowing too much flow (because the EGR differential pressure sensor that monitors EGR flow is faulty and is under-reporting EGR flow).
If the problem is not enough fuel, the underling cause may be a weak fuel pump, restricted fuel filter, leaky fuel pressure regulator or dirty fuel injectors.

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I have a 1990 corolla carburettor. When its at normal operating condition the car jumps and runs rough. When you accelerate the car runs well. It only plays up when at idle. But when cold it runs very...


Check for a malfunctioning EGR valve. This valve is only selected to perform when the engine is warm. It has a vacuum diaphragm which can crack and lead to vacuum leaks. This will cause rough running. The EGR valve should be vacuum checked to see if this diaphragm is leaking. This valve can also stick open due to carbon deposits. When the valve sticks open, the fuel/air mixture is leaned out and rough running ensues. This problem is practically expected on a vehicle of that age.

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2006 Dodge Caravan Sputtering. Code says EGR Valve. Would an EGR valve cause the van to sputter and run rough?


Absolutely. You'll know if your EGR valve is stuck or malfunctioning because your car will experience symptoms like rough idle and bucking on acceleration.

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Just replaced EGR hose & valve copver gaskets on 2002 Ford Escape 4WD. Did test drive, runs really rough & almost stops & cuts off. Any ideas?


OK, if you replaced the EGR hose, did you go all the way to change the EGR Valve? A stuck open EGR Valve can cause a rough idle and almost make it cut off.
Also, a vacuum leak on the EGR valve can cause a rough idle.

prev.gif next.gif Exhaust Gas Recirculation (EGR) Valve Removal & Installation 2.0L Zetec Engine NOTE: When the EGR tube is disconnected from the EGR valve, it must be discarded and a new EGR tube must be installed. The aluminum threads on the EGR valve must be inspected, and a new EGR valve installed if the threads are damaged.
To Remove:
  1. Disconnect the negative battery cable.
  2. Remove and discard the exhaust manifold-to-EGR tube. Use the following as a guide:
  3. Raise and safely support the vehicle
  4. Remove the splash shield
  5. Disconnect the EGR tube fitting
  6. Lower the vehicle
  7. Remove the air cleaner outlet pipe
  8. Disconnect the EGR tube from the EGR valve.
  9. Detach the vacuum line and remove the two retainer bolts.
NOTE: The EGR valve sealing surfaces are soft metals and easily damaged.
To Install:
  1. Installation is a reverse of the removal process. Carefully clean all sealing surfaces and install a new EGR valve gasket.
  2. Install a new EGR valve tube.
Detach the vacuum line (#1) and unbolt the EGR valve - 2.0L 02-04_escape_emissions_022.gif

3.0L (4v) Engine To Remove:
  1. Disconnect the vacuum line.
  2. Disconnect the EGR tube.
  3. Remove the EGR valve and discard the gasket.
NOTE: The EGR valve sealing surfaces are soft metals and easily damaged.
To Install:
  1. Installation is a reverse of the removal process. Carefully clean all sealing surfaces and install a new EGR valve gasket.
Detach the vacuum line (#1), unthread the EGR tube (#2) and remove the EGR valve bolts (#3) - 3.0L (4V) 02-04_escape_emissions_023.gif

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1 Answer

Runs rough on acceleration and surges when removing foot from accelerator. Also, has poor gas mileage. The vehicle is a 1998 Grand Cherokee with 5.2, automatic with four wheel drive.


This sounds like one of two things. Depending heavily on your vehicles milage, you could need a new EGR valve or a new timing chain/belt. Thank you, Dana

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Rough idle and acceleration on 1998 Chevrolet Silverado 5.0


Bad EGR valve comes to mind here. Assuming the plugs are good, the EGR valve woiuld be what I'd look at.

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1 Answer

2003 DODGE NEON RUNS ROUGH


Try cleaning the EGR valve first



electronic Tempture Control
ECT sensor
symptoms
Potential Symptoms

Symptoms of a P0118 could include:

* Very poor fuel economy
* A no start condition
* Vehicle may start, but run very poorly, blowing black smoke, running very rough and misfiring
* Illumination of MIL
EGR valve

Usually a fault in the control circuit, will leave no noticeable symptoms other than the Malfunction Indicator Lamp (MIL) illumination. However, if the EGR control solenoid
is stuck open due to debris, etc. the code may be accompanied by misfire under acceleration, rough idle, or engine dying altogether.

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