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EGR valve stuck open

EGR Valve Stuck in the Open Position If the EGR valve is stuck in the open position, the vehicle will experience a rough idle or frequently stall. If the valve is not completely stuck open but never achieves a tight seal when it closes, the engine can miss or shudder because of the improper mixture of the combustion elements So, when the EGR valve gets stuck open, it isn't able to stop the flow of exhaust gas from entering the intake manifold and thus the combustion chamber and your pickup or SUV will idle rough. Here's a few more specific symptoms you'll see EGR that happens at the wrong time, or doesn't happen at all, can result in engine performance problems. These problems depend on whether the valve is stuck open or stuck closed. EGR valve stuck open** :** A stuck open EGR valve allows exhaust gases to enter the engine at the wrong time. Common symptoms of this include You already know that all problems occur due to two reasons - the EGR valve stuck open or it stuck closed. So, it's possible to divide the symptoms of a bad EGR valve into two categories: EGR Valve Stuck Open An open EGR valve allows exhaust gases getting into the engine but at the wrong time

If your EGR valve is stuck in the open position, it can allow too little or too much exhaust gas into the combustion chamber. This can throw off the air/fuel mixture inside (which needs to be perfect) and cause the engine to idle rough. Reason #2 - Your Fuel Economy Lower An increase in hydrocarbon emissions isn't necessarily caused by a stuck-open EGR valve. Problems in other systems may cause this same symptom as well: a leaking fuel injector, bad ignition timing, bad cylinder compression, bad oxygen sensor, or other problems If your vehicle has stored a code P042E, it means that the powertrain control module (PCM) has detected a problem with the exhaust gas recirculation (EGR) valve control system. In the case of the P042E, the valve appears (to the PCM) to be stuck in the open position

What Are the Symptoms of a Sticky EGR Valve? It Still Run

Your vehicle will also suffer from the defect, e.g., with a severe loss of power. Oil vapors increase the accumulation of carbon in the exhaust gas recirculation valve, which often leads to a stuck valve. Suppose the EGR valve is always open, the quantity of air drawn decreases as a result of a high proportion of exhaust gas An (EGR) Valve, Stuck Open So, when the (EGR) is stuck open, it will lead to a vacuum leak. Consequently, causing inefficient combustion, hesitation, rough idling and even stalling. The reason for this is, that the engine cannot combust on the carbon dioxide, emitted from the tailpipe A faulty EGR valve or related component may leave the valve in either the stuck open or stuck closed position. The symptoms of a stuck open EGR valve are a rough idle with a lean air fuel mixture. The engine has a major vacuum leak. The symptoms of a stuck closed EGR valve are pre-ignition, ping, and knock EGR valves can become stuck 'open' or 'closed' due to a build-up of soot particles, carbon deposits and dirt from fuel. Motorway driving conditions are the most favourable to your EGR valve as longer, faster journeys allow the engine to get hot enough to get rid of carbon deposits

Symptoms of a Bad EGR Valve | AxleAddict

This is when the EGR valve mechanism stays open when the engine is at a low RPM or idling (stopped at one space). The extra addition of exhaust gases will then cause the engine to go haywire In this video I will explain how to use vacuum gauge and laser thermometer to diagnose stuck open EGR valve.This car had EGR pipe plugged up here is link to.

The more the EGR gets clogged, the more carbon dust is produced. The more carbon dust is produced, the more the EGR valve clogs. This viscious circle continues until the EGR valve jams completely open or closed. If the jammed EGR valve is not repaired or replaced quickly, all sorts of problems may occur My EGR got stuck open at 30K or so, didn't have enough time to pull it out as I was leaving on a trip, slipped a blocker plate in and stopped all the smoking and poor off the line performance. I had a PPE in at the time, so the EGR was turned off and the codes were shut down too EGR valves are more commonly found in diesel engines these days and when fully functioning, they reduce emissions greatly. If you have a broken EGR Valve, you will want to make sure it is kept closed and not always open. If the valve is always open, too much gas will go to the engine and this can break many other things Support this channel www.patreon.com/top5autorepairs Visit: http://www.top5autorepairs.com This video is for the following,Egr valve symptoms,Exhaust gas rec..

Engine Surging: How To Troubleshoot & Fix - CAR FROM JAPAN

The egr valve stuck open on my 2014 Mack with an MP8 engine. The engine sounded like it was ready to explode from exhaust pressure. Did this do any damage to the engine? I've never heard an engine sound like this!! Quote; Link to post Share on other sites. 41chevy 10,263 Posted August 16, 2019 The EGR valve recirculates a small amount of exhaust into the combustion cycle. The warmth of the exhaust lets the combustion chambers warm up quickly, while the spent, inert gases keep the chambers from getting too hot when the engine fully warms up. Whether mechanical or electronic, EGR valves open and close to control the gas flow In any case, the EGR valve comes up with symptoms to indicate that it is having some fault. 1. Valve stops at the open position. Your EGR valve may remain in an open position and get stuck there. Remaining in this position means that the valve will create a vacuum leak which leads to an incomplete combustion cycle

Part 1 -Diagnosing a Stuck Open EGR Valve (GM 4

Signs of a Bad EGR Valve - RepairPal

If it's stuck open you will notice that you will have driveability issues such as stalling,hard starting & flat spotting when cold or if it's blocked nothing but an increase in nitrous oxide emissions !If the EGR Valve does not open, the emission test will show higher levels of Nitrogen Oxides, if the EGR Valve is stuck open, the engine. The EGR being stuck open can cause carbon buildup which can cause the EGR valve to fail or the carbon deposits can travel to the turbocharger and cause damage to internal components. Some scan tools allow you to test the EGR valve by opening and closing the EGR valve while monitoring the position of the valve The EGR valve allows a specifically measured amount of exhaust gas to re-enter the intake stream. This changes the chemical makeup of the air entering the engine, and keeps the combustion process from getting destructively hot. If the valve is stuck open, exhaust air will flow into the intake before the engine needs it, causing a rough idle. An EGR valve that is stuck open. When the EGR is stuck open, it will lead to a vacuum leak which in turn causes inefficient combustion, hesitation, rough idling and even stalling. The reason for this is that the car cannot combust on the carbon dioxide emitted from the tailpipe. An open EGR valve causes exhaust emissions to flood the combustion.

Common Symptoms Of A Bad EGR Valve You Might Not Kno

Once the engine reaches operating temperature and speed increases, the valve, either through vacuum or electronic control will gradually open, allowing burned exhaust gases to enter and combine with the air-fuel mixture inside the combustion chamber. When the EGR valve is clogged or dirty, as they are prone to, it may not function properly. TEST 2: EGR Valve Pintle Stuck Open Over time and thousands of miles, the engine will produce carbon -which will usually end up coating the piston crowns. Eventually, this same carbon will cause the EGR valve's pintle to become covered in it and keep it from closing against its seat completely How to Know If Your EGR Valve Is Stuck or Malfunctioning . The EGR valve, or Exhaust Gas Recirculation valve, is a vacuum controlled valve which allows a specific amount of your exhaust back into the intake manifold. This exhaust mixes with the intake air and actually cools the combustion process. Cooler is always better inside your engine

Answer: The problem could be with the ignition system, or a solenoid related to the EGR valve is not operating correctly, making the valve get stuck and cause misfires. Question: I replaced my EGR valve and top vacuum hose, but the light of my vehicle is back on with the same code Actually, the test for finding out if your EGR valve is still able to open goes like this: Run your car at idle, apply 12 V to the EGR valve's solenoid (making sure you don't fry the ECU!), and if the engine starts to run very rough or even dies, bingo, your EGR valve is able to open. Your problem, of course is the other way round Poor Acceleration: The air/fuel ratio is not optimized with the valve stuck open, leading to a decrease in engine output. How to Install the EGR Valve. The EGR valve is in different locations for the 5.7 and 3.7/4.7 engines. On the 5.7, you will find it tucked between the air box and alternator That's SIMPLE, remove the THREE bolts on the front of the EGR valve that connect the crossover pipe to the valve. Don't drop the gasket! Gently lift the pipe upward and look into the velve with a good flashlight, if the valve looks to be open AT ALL, it's bad (key off obviously) EGR valve stuck open. Do Performance Diagnostics . VGT actuator or vanes sticking. but 1 to 2 did not equal B+, check for high resistance or open in ground circuit. Do Harness Resistance Checks - ECM to ECM Chassis Ground . Also code for EGR valve mechanical failure. Replaced them and those codes went away

What Are The Symptoms Of A Faulty EGR Valve? [Clear Guide

  1. g from the EGR cooler into the intake system to cut down on emission levels. The code was 1896 EGR Valve Controller out of calibration
  2. Stuck open: If the valve is stuck open, you'll notice that the check engine light comes on, the BMW uses more fuel, has lost power, and may stall when the engine is idling. The vehicle will also have increase exhaust small and will particularly struggle at low speeds. Stuck shut: If the valve is stuck shut, you'll notice fewer issues. The.
  3. g

Symptoms of a Bad EGR Valve - AxleAddic

  1. An EGR valve that is stuck open: if your truck has a mechanical EGR valve and it happens to be stuck open, it will act as a conduit which causes a vacuum leak in the engine. Some of the manifestations of this include rough idling and even a feeling of hesitation when you try to accelerate
  2. I doubt the D13 egr valve could get clooged with soot in such a way to get stuck open , because high pressure gases are acting perhaps like sanblaster . I read that valve and valve seat could be made from materials with different expansions rate fluctuatipn with temp and not close
  3. g into the engine, making the air/fuel mixture run lean (too much air for a measured amount of fuel). At startup you would notice hesitation, surging/miss at part throttle, rough idle and engine vibration, and poor engine acceleration once driving. If the EGR valve is stuck closed, the.
  4. g
  5. A stuck EGR valve can cause the engine to ping, and that will soon destroy it. Based on the performance issues you described, it sounds like the EGR valve pintle occationally sticks in the open position.EGR typically should only takes place at low load, highway speed driving conditions

P042E Exhaust Gas Recirculation A Control Stuck Ope

EGR valves either become stuck in the open position or stuck in the closed position, so once you've figured out which problem plagues your own truck, you can get on with the rest. Closed Position: This means that the EGR valve is stuck shut and refuses to open. There will be increased nitrous oxide gas which will create engine knocking EGR valve stuck open can cause rough idling, and the exhaust gas cycle back into the chamber. Conclusion. Now, you know the consequences when your vehicle's EGR valve gets faulty. So, be prepared whenever you find out anything fishy, do an EGR replacement, or take your vehicle to the professionals.. The EGR system allows exhaust gas to be introduced into the intake stream in order to cool combustion chamber temperatures under load. This reduces NOx emissions and helps prevent pinging (detonation.) The EGR valve is closed at idle. On throttle application, the EGR valve will be commanded open by the PCM as needed. How the PCM tests the EGR. EGR volume control valve stuck open Faulty EGR volume control valve EGR solenoid valve harness is open or shorted EGR solenoid valve circuit poor electrical connection Faulty EGR temperature sensor and circuit How is the P0402 FORD code repair? Start by checking the Possible Causes listed above. Visually inspect the related wiring harness and.

6 Symptoms of a Bad EGR Valve, Location & Replacement Cos

Use the hood release lever inside the Caravan to pop open the hood. Find the EGR valve, which is located on the engine intake manifold. Refer to your Dodge Caravan owner's manual for exact location of the manifold. Step 3. Use a socket wrench to loosen and remove the bolts that secure the valve in place. Remove the valve from the manifold 96 Saturn Coupe SC2, just got back from the mechanic and he said the EGR Valve is stuck open. The cost for the part is $243 which seems a bit high. Their labor is $90/h, so $358 total for the estimate. The problem: Car starts fine, but bogs down after ignition. I need to give it some gas for 5-10 seconds, then it's fine. He said it idles high

A valve that sticks open can quickly turn your lawn into a swamp and kill all of the grass in that area. Although many homeowners prefer to call their local irrigation maintenance company, fixing a valve that is stuck open is a task that anyone can accomplish EGR valves frequently malfunction when they become stuck open or closed due to carbon build up. Signs of an EGR valve malfunctioning include: Check engine light (diagnostic codes usually in the low P0400s) Reduced power and fuel economy; Pinging or knocking sounds; Rough idle; Stalling and hesitation when accelerating; You can clean an EGR. Ford F-150 owners have reported 69 problems related to gas recirculation valve (egr valve) (under the engine and engine cooling category). The most recently reported issues are listed below. Also please check out the statistics and reliability analysis of Ford F-150 based on all problems reported for the F-150 It could be stuck open, stuck closed, or clogged up. The check engine light is on - sensors in your car will be able to tell when the temperatures in the engine or the exhaust pipe's oxygen content are too high, for example. Modern vehicles will also have a sensor directly linked to the EGR valve, which will let it know if it's. Also, can I drive with a bad EGR valve? A stuck EGR valve can cause the engine to ping, and that will soon destroy it. Based on the performance issues you described, it sounds like the EGR valve pintle occationally sticks in the open position. EGR typically should only takes place at low load, highway speed driving conditions

Honda Civic egr valve stuck open 1.7 cdti - Honda 2004 Civic questio EGR valve STUCK! Jump to Latest Follow 21 - 33 of 33 Posts. Prev. 1; 2; First 2 of 2 Go to page. Go. dill · Registered. Joined Jan 11, 2008 · 121 Posts . Discussion As I understand it, if the valve was stuck open it would let boost into the cooler and with it blocked at the end with freeze plug, it would expand and fail. 2003 f250 lariat.

What happens when EGR valve stuck closed? - AskingLot

  1. es that the valve is stuck open. The PCM retests for a stuck valve when the desired EGR position returns to 0%. A failure timer increments if the stuck EGR valve condition is still present
  2. If the valve is stuck open due to carbon, rather than the money to clean it, you're better off having the shop install a new EGR valve. Symptoms of a bad EGR valve • Rough idle—Carbon buildup on the tapered seat prevent the pintle from seating allowing exhaust gas to flow into the engine at idle and choke it, leading to a very rough idle
  3. The exhaust gas recirculation valve is a mechanism that captures unburned fuel and recirculates it back through the air intake. With the help of a DPFE sensor and EGR temperature sensor to monitor the levels and an actuator solenoid that opens when the DPFE sensor senses unburnt fuel in the system
  4. g properly
  5. This code indicates a problem with the EGR valve's pintle position. The EGR Valve's pintle could just be stuck in which case the problem could be fixed by cleaning the EGR valve. If the EGR valve is electronically controlled or cleaning the valve does not fix the problem, you will most likely have to replace the EGR Valve. i hope this help
  6. 2004.5 Duramax LLY 280k My EGR valve is stuck open. Can someone give me advice on whether it is better to replace it with a new valve or to install a delete kit? I'm under the impression that if I install a delete kit I will also have to buy a custom tune. (Currently running stock) Any luck just trying to clean it? Thanks in advance for the input

If adding either smooths the engine out then you are not looking at a stuck injector but more likely a vacuum leak and if you are getting an EGR code I would suspect the EGR valve may be stuck open and or leaking

Dirty EGR Valve: Since the EGR valve simply pulls exhaust gasses from your exhaust and introduces them back into your engine's intake air over time it will become clogged or stuck open/closed from the carbon deposits. It is possible to clean the EGR valve if you remove it from your vehicle and either spray it out or let it sit in regular gasoline An EGR valve that becomes stuck in its open position allows too much exhaust into your engine. This extra exhaust often causes the vehicle to idle more roughly than usual or even stall out entirely. In some cases, a mechanic can fix the issue simply by cleaning any deposits off of your EGR valve If your vehicle has stored a code P045E, it means that the powertrain control module (PCM) has detected a problem with the exhaust gas recirculation (EGR) valve control system. In the case of the P045E, the valve appears (to the PCM) to be stuck in the open position The exhaust gas recirculation valve (EGR) may stick open causing a rough idle and the check engine light to illuminate. Our technicians tell us that a piece of carbon may become stuck in the valve causing this problem. Cleaning the valve will usually correct this condition, in some rare cases the valve will need to be replaced

Where is the egr valve. Is it serious to be stuck open? And is there a bypass to eliminate since it will probably be an on going problem? Any help will be greatly appreciated. DJ . Reactions: Gilliamdon55. Save Share. Reply I had a code for the EGR valve stuck open. I tried cleaning it but it didn't help (and didn't seem that dirty). Then I tried replacing it. Both times the code came back. What should I do now? I reset the code each time by disconnecting the battery. db4690 July 28, 2016, 3:38am #2. How about posting the exact code, please.

Symptoms of a Bad or Failing Exhaust Gas Recirculation

EGR valve stuck partly open Plugged EGR cooler For all EGR related codes, always refer to 20.18 Exhaust Gas Recirculation System Basic Checks for Series 60 Engines and perform the exhaust gas recirculation system checks.‪ Section 75.3.1 Check for an EGR Valve Stuck Open or Partly Open. This same procedure may be found in the Series 60 EGR. The EGR valve has a very strong spring, difficult to move by hand. Get the EGR adaptation done; it'll probably make that code go away. While having the VAG-COM open to do that, have a look at specified and actual airflow in group 3; too much difference between them under some conditions is what trips that code The EGR valve basically is open or closed. If it gets stuck open rough idle, stalling poor performance at low rpms. It is usually open at higher rpms and cruising speeds. It actually cools the combustion process by sending exhaust gas back into the engine, but it should close at low rpms and idle An EGR valve that is partially stuck open would most likely cause what condition. Rough Idle. The PCV system controls which exhaust emissions? A) HC B) CO C) NOx D) Both A and B. Both A and B. Technician A says that if a PCV calce rattles, then it is okay and does not need to be replaced. Technician B says tha tif a PCV valve does not rattle.

Diagnosis was EGR Valve was stuck open and the intake manifold had caught fire. The Intake Manifold had 3 burned holes on the passenger side. All repairs were covered under warranty. Returned to me 20 Nov 19. 2 photos, 1) Initial dealer codes and 2) dealers summary of repairs Technician A says that the PCM can monitor the commanded position of the EGR valve to determine if it is functioning correctly. Technician B says that the PCM can open the EGR valve and monitors for a change in the MAP sensor or oxygen sensor reading to detect if the system is functioning correctly

How to Fix a Faulty EGR Valve - Somerville Hin

In detail, if the EGR valve is stuck open, a continuous flow of exhaust gases enters the cylinders, disrupting the combustion process. This will cause the engine to act like it wants to stall, idling roughly or surging. If the valve is stuck closed passages become clogged, detonation could occur in the combustion chambers The EGR cooler bypass valve This is where the EGR cooler bypass valve comes into the picture. As the name says, this allows (or does not allow) the exhaust gases going through the EGR cooler to bypass the actual cooling parts and getting rerouted back into the intake without having lost most of their heat energy

What Are the Signs of a Bad EGR Valve? CarBible

Over time, the valve itself can accumulate carbon deposits from repeated exposure to heat and other detonation byproducts, causing system blockages or the valve to get stuck open or closed. Knowing how to clean an EGR valve is a helpful trick to add to your repertoire, and a quick fix if your engine is suffering any of the associated negative. Subject: RE: EGR valve stuck open : Legendary contributor Posts: 9556 Location: Pissindoon, Scotland. mikefitz - 2018-05-16 10:51 PM Once the EGR valve starts to have problems on the 2.2 Puma engine it will get worse and can reach the stage where the vehicle is almost impossible to drive. The internal mechanics just wear ou A lot of people (including me) fit an EGR bypass kit which has a similar effect to the thing being stuck open, as for the tunit box, if it was poorly mapped it could indeed affect th operation of the turbo but this would be to the detriment of the engine

Just a heads up, if you get old EGR off and it's stuck open from carbon chunks before you put new one on and the motor is still able to start, crank it over to blow the rest of the carbon buildup out. I learned the hard way on a mustang and every 2 to 3 weeks I had to remove valve to dislodge chunks If you plug those holes on a working EGR valve then the EGR valve will quickly get stuck open - i.e EGR on all the time - as the space under the diaphragm becomes pressurized and the EGR piston is permanently raised. If your EGR valve is non-operational because the EGR valve diaphragm is damaged - holed, torn, etc. - then you could plug those. Repairing an EGR valve. How an EGR valve works and how to fix / replace a stuck EGR valve. Contributed by: Enginebasics.com. Almost all cars and trucks today are equipped with an EGR valve so it only makes sense that we write an article that helps you understand what it is and how to fix or replace it when the time comes Failing open: This is a more rare failure mode and can happen if enough carbon builds up on the valve stem to hold it open against the action of the compressed spring. The effect of permanently open EGR on engine performance may be very severe, showing similar symptoms as a partially plugged catalytic converter

High Idle XJR - Jaguar Forums - Jaguar Enthusiasts ForumCode P0101 - Mass Air Flow Sensor Circuit Range/Performance

Common Sign and Symptoms of a Bad Egr Valve: How to Test

The final symptom of a faulty EGR valve doesn't apply to one that is sticking open or closed, but rather one that is clogged up. This is a symptom more of the rarer sort, however still possible, so be sure to keep in mind the carbon build-up from exhaust gases We open the steel line at the EGR valve and feed in a long section of speedometer cable. We spin the cable with a drill motor and run it through the whole tube into the intake manifold. This is a simple operation, yet it prevents having to unbury the actual fitting when it's really plugge Mechanical Engineering Automotive Technology: A Systems Approach (MindTap Course List) Technician A says that an EGR valve that is stuck open can cause idle problems. Technician B says that a stuck closed EGR can increase HC emissions. Who is correct? a. Technician A only b. Technician B only c

(EGR) Valve - Exhaust Gas Recirculation Valve, What Should

Will the EGR valve cause any problems if it's left open and stuck ( I'm assuming it's stuck open )? 2006 GMC Sierra CCLB 2500HD EFIlive, DSP5, EGR blocked, Magna-flow downpipe, MBRP 5 turbo-back, aFe pro-guard EGR valves can malfunction by becoming stuck open or closed due to carbon buildup. When an EGR valve malfunctions, CO2 is reintroduced to the combustion chamber at the incorrect time or in incorrect amounts, which does not decrease the combustion temperature sufficiently enough to prevent the increase of NOx EGR Valve. It is very likely that the EGR valve itself is the cause of P0404. It may be stuck open or shut. The EGR's job is to recirculate a certain amount of exhaust gas back into the combustion chamber. When it fails to recirculate this gas it can raise the combustion chamber temperature. Here's more on how to test an EGR fro New EGR valve gasket Removing the EGR Valve 1 Open the hood and detach the negative (black) battery cable using a wrench. 2 Look for the EGR valve next to the end of the valve cover on the top of the engine. The valve is a small cylinder with an electrical connector on top and a tube connected to its base

What an EGR Valve Does: Its Function Symptom

A faulty EGR valve can cause problems with the flow and operation of the EGR system leading to performance issues including a reduction in power, reduced acceleration and decreased fuel efficiency. EGR valves can become stuck 'open' or 'closed' due to a build-up of soot particles, carbon deposits and dirt from fuel The EGR valve is opened by the application of vacuum to its control diaphragm. Some also require a certain amount of exhaust back pressure before they'll open. On newer vehicles, the valve is electronic and uses one or more solenoids or a small stepper motor. The valve should remain closed while the engine is cold and at idle The EGR valve may be stuck open. If the valve is stuck open, the engine won't idle because with the EGR valve open, there's essentially a HUGE vacuum leak. Fouled plugs Look for carbon buildup on the EGR valve or the seat that would prevent it from closing. Clean as needed. IF teh EGR valve is stuck open or is damaged, replace it. Hard starting because the EGR valve is not closing and is creating a vacuum leak into the intake manifold. See same fix as above

trouble code P0401 EGR flow insufficiant? | IH8MUD Forum

How to Quickly Spot the Symptoms of a Failing EGR Valv

The EGR valve is stuck open or is jamming (due to carbon build up or possibly a bent shaft). Mechanical fault. Yes: P0403: EGR Circuit Malfunction: Solenoid circuit malfunction. ECU reads voltage low at EGR solenoid. Electronic fault. No: P0404: Exhaust Gas Recirculation Circuit Range/Performance: Solenoid circuit malfunction. ECU reads voltage. What if your EGR cooler leaks coolant up to the EGR valve. Doesn't that pressure have the potential to open the EGR valve? I realize the design of the EGR valve is to distribute the pressure forces both upwards and downwards (intake opening above the top EGR valve plate AND below the bottom plate), but I would think that slight pressure differences could cause it to open from the coolant pressure

Signs of a bad EGR valve include rough idle, engine knocking, and a loss of fuel economy and power, but the symptoms vary depending on whether the valve is stuck open or stuck closed. Both mean trouble for your engine's combustion chambers, and both can cause a check engine light 16785/P0401/001025 - Exhaust Gas Recirculation (EGR) System: Insufficient Flow Detected Some TDI-CR engines have a filter for the EGR that can become restricted and cause a Insufficient Flow code. When this fault is stored in a 2009-2014 NAR market 2.0L CR TDI (CBEA or CJAA ) VW Jetta/Golf (1K/AJ The engine will experience rough idling when there is a malfunctioning EGR valve because the valve will get stuck in a closed or open position. This means that too much or too little exhaust gas will be entering the chamber, which will cause the engine to not run smoothly I have pulled codes for the EGR valve not opening, and i have taken it off again and it is spring loaded, its not stuck. Nothing makes sense anymore, i replaced all the parts above at once, and after doing so, it ran better than before, it like woke up, then the next day out of no where, starts backfiring and lost all power then stalled

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