How can i tell if my EGR valve is stuck open on my 86 vett? There is an EGR function diagnostic that runs at certain times. Your vehicle's computer will detect an issue with your engine and illuminate the engine check light on the dashboard. The engine sounded like it was ready to explode from exhaust pressure. . If you turn the EGR to blank it off, you have to have a working EGR so it sends the correct signal back to the ECU or you get a fault code, usually PO0400 EGR malfunction. . Unplugging the EGR will set a soft code which won't give you a light. This writeup is for a 2005 Kia Sorento EX 2.5 CRDi diesel (BL model). If your EGR valve is stuck in a closed position, the temperature inside the combustion chamber will be too high. Fully aware of all legalities. Rjpierma24 Location Offline Senior Member Reputation: 5. Black exhaust smoke is usually a strong indicator of an issue with the carburetor . Knocking Sound. Vacuum supply issues at the (Vacuum operated EGR valve) Electrical problems with the EGR valve control circuit . there's too much fuel, so the unburnt fuel starts spewing out of the exhaust as black smoke, especially when the engine is at idle. I want everything EGR removed for peace of mind and future proofing the vehicle from headaches. . THe excess fuel will also "wash" the . As a result, you may experience pinging (detonation) and light acceleration. From a stop it is very slow to get going until the turbo kicks in, then it goes. lastly, exhaust restrictions such as a clogged catalytic converter, or pinched exhaust pipe section can cause this. Symptoms Of A Stuck Open EGR Valve As you're probably already aware, the EGR valve's job is to let a metered amount of exhaust gas (that is oxygen free) into the intake manifold to reduce the amount of oxygen entering the engine. The best way is using a tuner such as quadzilla, PPE, EFI live and get a EGR block off plate. hi there just new to this forum i got a 2008 ford transit when i put my foot down i get a puff of black smoke from exhaust i took it to a garage and it showed up the egr valve was stuck open i got that changed and got the codes reset but i still getting the black smoke from exhaust it seems to be happening at . 2. This can have a negative effect on particular parts of the exhaust system such as the catalytic converter. Your car has poor performance Poor performance can be caused when the valve is open or closed. Aug 16, 2008. View complete answer on carcarehacks.com The EGR system flow is excessive. We will remap the ECU to electronically programme the EGR valve to remain closed at all times and remove the EGR functions from the vehicle's software to ensure that you don't have any problems with it again. Posted by Doug Wolffe on Aug 16, 2013. Sounds to me your turbo is just leaking oil and you exhaust is burning it. And what's more, perhaps if it's stuck open then I'd have thought a dashboard light would be manifest - you know, emissions or engine management. Run the engine to full operating temperature Disconnect the batteries for 5 minutes If you have a scan tool - retrieve and clear all DTC's, run a KOEO (key on engine off self test) then cycle the ignition off then on two times then off. In a diesel there are several reasons for this. Especially one might observe black or grey smoke coming out of the exhaust pipe. 2005 Kia Sorento EGR Valve and Related Problems. 2. In a diesel engine, a bad EGR valve is one of the causes of a black smoke. some people say when the valve is blocked it causes combustion temps to rise and damages the turbo as the egr gases arent as It requires cutting and splicing the MAF wiring which is basically a hack job. Rough Idle. I think its normal for the egr to open as soon as the engine is running if the coolant temperature is 13c or above. I would clear the codes & plug the egr back in & test drive to see if any codes come back. When the EGR valve goes bad these gasses have nowhere to go but out through the exhaust, and they appear as black smoke. if they installed your turbo and moved your vgt Whilst the EGR may only be held by three bolts it seems that it is all the nearby ancillary items around it which causes the problem. get some throttlebody/carb/intake manifold cleaner and clean it out good. I would think this would effect the performance of the car as technically you have an air leak in the system with that gap. If they stick open, the engine is not getting the correct air mixture to burn the fuel efficently, causing black smoke and lack of power. 3. I know my truck had codes stored when we hooked the AE up to it. Can't see how a dodgy EGR would cause blue smoke. The reason im asking is because : im getting a code 32 on the check engine light errors. EGR valves can become stuck 'open' or 'closed' due to a build-up of soot particles, carbon deposits and dirt from fuel. To read the trouble code from the engine control unit, you have to use an OBD2 scanner. If the engine is over revving then the exhaust will open before the fuel is burnt, giving black smoke. Overheating problem. The Check Engine light might also come on in either case. Welding closed fixes the stuck open issue. Prices start from just 150 all in for an EGR delete and can take as little as 1 hour to do at our workshop in Shrewsbury. Detroit engine 60 series 14-liter problems. The egr valve stuck open on my 2014 Mack with an MP8 engine. I also would have the ecm updated. Here are the symptoms of a faulty EGR valve to look out for: 1. Cars starts fine, idling is fine, but smokes heavily under acceleration up to 2000rpm when the turbo kicks in, then the smoke disappears. Black smoke is often caused by a faulty EGR valve in diesel engines. Answer: Check the electrical connection to the EGR valve sensor. All that is required to keep the codes from popping is to disable the diagnostic. The Check Engine light might also come on in either case. A vehicle will release black smoke due to excess fuel running into the engine, thereby leading to incomplete combustion. Consequently, causing inefficient combustion, hesitation, rough idling and even stalling. You are likely to experience acceleration difficulties alongside a general reduction in the engine's power when you step on the gasoline pedal. Create an account or login to comment As soon as you let go of the throttle, the car stalls. Black smoke means increased exhaust temperature and particulates. Often times what happens with these is over time the pintle shaft gets soot creeping up inside the actuator portion of the valve and the little mechanism gets sticky. if the egr was stuck open then your whole intake manifold is gonna be full of shit. Because, an open (EGR) valve causes, exhaust emissions to . Usually, the initial driver symptoms of the clogging of an EGR valve is loss of power, excessive black smoke under load, engine management lights, limp mode, and . Command the turbocharger vane position control solenoid ON to 100 percent and inspect for leaks around the EGR valve gaskets. When the valve is open and has continuous exhaust of gas flow towards the intake manifold, it can cause rough idle during a brief stop or when starting a vehicle. When my egr went bad it didnt black smoke at all. The valve won't be able to open and close properly, meaning the emissions will increase. This may cause pinging (detonation), as well as surging on light acceleration. It can be loose or a wire in the circuit is damaged. #22. re: 1.9 jtd 115 - poor mpg & black smoke (EGR stuck?) The EGR valve can become stuck in the "open" or "closed" position due to the buildup of soot particles, carbon deposits, and dirt in the fuel. Now at 102k same lights came on and power decreased to limp mode whilst towing a Van. Thanks, Doug L Spray the EGR valve gaskets and EGR cooler gaskets with a soap solution. For example, when my EGR started playing . The MAF is a key sensor in controlling the flow through the valve, and a damaged or dirty MAF could make it look (to the ECU) like the EGR was not working. Egr valve stuck open on a 2000 monte carlo. This valve is supposed to open at a specific time, recycling the exhaust gasses back through the engine. stuck egr can effect performance due to the fact depending on which pcm programing your truck is running. Have the garage remove and . Symptoms of a broken EGR Valve are as followed: Excessive black diesel smoke under load Poor Miles Per Gallon Very Rough Idling Lack of power ( limp mode) Usually an error message of some sort (depending on car age) Of course, there may be other symptoms that are specific to each car but these are the usual and most common. A bad EGR valve must be replaced ($50-$320 part, plus $90-$320 labor). Sorry I had to do an egr core. Ridin'GMC. You are quite correct GCM. The most common issues with the 14L Series 60 Detroit are-1. it stops a load of crud building up in the inlet manifold and all the other problems you get with the valve sticking open and excessive smoke from the exhaust. . When the engine light shows up, there is a trouble code stored in the engine control module. Surely EGR shouldn't be the problem again. An EGR system delete will not cause black smoke because it doesn't involve incomplete combustion. Grimbo. Whereas urban driving conditions can allow these . The associated air cooler to the EGR is one of them. The reason for this is, that the engine cannot combust on the carbon dioxide, emitted from the tailpipe. To avoid EGR valve-related issues, you can clean the EGR valve on a regular basis. Another symptom is the knocking sound of the engine. Don't get the fingerstick if you don't want to mess with the MAF sensor wiring. Nov 26, 2006. This is caused by: The EGR valve mechanism is stuck open; The air filter is clogged or dirty; There are intake leaks; There could be a problem with the turbocharger; An incorrect vacuum hoses connection Subsequent Damage. Verify all the wires in the circuit are properly connected. When my EGR valve stuck open it idled but a little rough and when I tried to drive down the road it made a ton of black smoke and felt like it was firing on two cylinders. Incomplete combustion results in unburned gas blowing from a vehicle's exhaust pipe. Disconnecting the rod that opens and closes the valve allows the computer to activate the motor normally its just not connected anymore. 2. in park at idle, revving the engine through the rpm range will show roughly a 10% discrepancy between the desired and actual fuel pressures, the actual being lower. Start the engine and allow it to idle for 10 minutes. When downloading program it asks if I have an EGR modification. The Xcal2 may not even pick up the code. Black smoke. . If everything checks okay, you need to check the voltage in the circuit or the EGR valve itself for carbon buildup interfering with the valve operation. 2. To fix it you will need to remove the pipe and thoroughly clean it out with brake cleaner. If your EGR valve is faulty, you might notice gray, dark, or black smoke coming out from the tailpipe. that code is egr temperature-data valid but above normal operating range, you could have a bad egr temp sensor, stuck open egr valve, i'd also check the egr massflow sensor and sensing ports for plugging, and like i tell everyone, black smoke is caused by either not enough air. The car will not start and idle without having the throttle pressed. If I unplug EGR valve whe. Since there's a feedback potentiometer (resistor) monitoring its position. black smoke when accelerating. Other possibilities??? An (EGR) Valve, Stuck Open. EGR Valve Stuck Closed So, my money is on your RTCV in this case. The orange you can see is the edge of filter element. Poor engine performance. 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. We know that both the EGRs and the Turbos in these trucks are total garbage. If a leak is found replace the EGR valve gasket. This could be as simple as the EGR (exhaust gas recycling) valve stuck open. You can expect the EGR valve to cost $150 to $400 while labor costs $75 to $400 But before you jump straight to replacing the valve, see if you can't clean it first. To take it off. Over possessing fuel will cause the catalytic converter to overheat and break apart . 1) EGR valve stuck open at the wrong times 2) Turbo undepressure 3) Fuel problems resulting in incomplete combustion (impurities/contamination). as you describe though, lack of power and heavy smoke is a cause of a few things, plugged air filter, very dirty mass air flow sensor, exhaust gas recirc valve failing allowing uncommanded exhaust to enter intake, under boost, this open egr will also dump boost pressure to the exhaust, hense loss of power and more black smoke. R Russell Keys 1/2 ton status Joined Mar 16, 2000 Posts 253 Reaction score 0 Location Huntsville, TX Sep 19, 2001 With the valve closed and in place it blocks the EGR passage in the intake manifold. Clicking this will make more experts see the question and we will remind you when it gets answered. There is an open emissions recall for this truck. Start the engine. Thanks Given: 79 G. Most recently the EGR tubing which connects to the rear of hte exhaust manifolds has rusted off. In a diesel engine, a bad EGR valve is one of the causes of a black smoke. The Exhaust Gas Recirculation (EGR) valve is an anti-pollution device, aimed primarily at reducing the amount of nitrogen oxide (NOx) spewing out of the vehicle's exhaust pipe. Almost no throttle response at all except when in park. If your EGR valve is faulty, you might . im not sure where you can get it from but we use it at my Stuck open EGR Valve; Melted engine coolant temperature sensor. A stuck open EGR valve can be the cause of this. . If you want to bypass egr and fool the computer take it off, weld the valve closed, disconnect the control rod from the motor. At this point, your engine is running rich which means it is burning more fuel than air. yes it can cause smoke if the gasket is bad it will leak oil, the oil will run down the side of head & onto exhaust manifold where the heat of manifold will burn oil causeing it to smoke, if its smoking out the exhaust pipe you have something else wrong if valve cover is leaking the smoke will be coming from under hood while the motor is running 26 Answers A clogged EGR would remain open to manifold vacuum and cause the sensors to believe the engine is running too lean. Common EGR valve problems It will help increase the lifespan of the EGR. 20+ year owner of this Ramcharger and the EGR and TBI consistently becomes an issue every 2-5 years, EGR mostly. Black smoke out of the exhaust? Sticking or faulty EGR do cause excessive black smoke. . The engine produces nitrogen as part of the combustion process. The engine will experience rough idling when there is a malfunctioning or nonworking EGR valve since the valve will get stuck, either in a closed or open position. Common warning signs to look for are: Rough idling The engine does not kick off Stalling and hesitation of the engine The check engine light coming on Increased emission is a warning sign. They were related to flash programming, but the Xcal2 doesn't see them. So, when the (EGR) is stuck open, it will lead to a vacuum leak. Have you tried full throttle with egr valve unplugged to see if it cures the black smoke. When you find the EGR closed in the stuck position, have a look at the error codes.
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