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Symptoms bad egr valve 3000gt - Mitsubishi Cars & Trucks

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 398 Answers

SOURCE: what are the symptoms of a bad egr valve ina 1994 geo tracker?

this may help
EGR Theory. EGR serves one purpose and one purpose only. That purpose is to reduce Oxides of Nitrogen (NOx). Undernormal combustion, Nitrogen(N2)Oxygen (O2) in the air and Hydrocarbons (HC) in the fuel combind into water(H2O) Carbon dioxide (CO2) and the Nitrogen remains unchanged. Under very hot combustion temperatures, the Nitrogen reacts with the other two byproducts and forms Nitrogen oxide (NO). After being released into the atmosphere, it picks up another Oxygen and becomes Nitrogen dioxide (NO2). In the presence of sunlight,
it combines with other compounds like Hydrocarbons and forms Smog. Since exhaust gas is inert (very stable) it doesn’t burn again. So by being introduced into
the combustion chamber, it will lower combustion chamber temps enough so that
the Nitrogen doesn’t react with the other compounds and is passed unchanged out
the tailpipe thus not contributing to smog. Now, since exhaust gas doesn’t burn, it
doesn’t exactly help with combustion. At higher RPM’s, this really isn’t noticable,
but at idle, the reintroduction of exhaust gas will cause a very rough idle and can
cause stalling if to much is introduced into the combustion chamber

Posted on Mar 07, 2009

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emissionwiz
  • 76109 Answers

SOURCE: malfuntion light coming on...egr valve may need replaced

the range from a simple sensor issue with no symptom except a check eng light to a rough idle with a light.

Posted on Mar 20, 2009

duane_wong
  • 6826 Answers

SOURCE: what are the typical symptoms of a bad egr valve

A vacuum leak at the egr valve can cause rough idle and almost stalling condition.

A non functioning egr valve that is plugged up won't affect driveability, but NOx will be in the exhaust at normal operating temperature which may not be good for an emissions test if they test for that in your area.

Good luck on this repair.

Posted on Nov 20, 2010

dttech
  • 4803 Answers

SOURCE: 95 check s-10 blazer idle

An EGR that is stuck opencan very well cause the symptom you are decribing, including surging at idle and poor acceleration.

Failure of GM EGR Valves is quite rare.
A common problem on the 4.3L Vortec engines is failure of the Central Multiport Injection Assembly located between the plastic upper intake plenum and the lower intake manifold.

Sometimes failure of injector lines and/or the fuel pressure regulator (Part of the MFI Assembly) will cause fuel to spill into the upper plenum area. This can dislodge carbon deposits in the upper plenum which then get stuck in the EGR Valve and cause the symptoms that you are describing. The EGR Valve can be removed and cleaned. Replacement is not usually necessary.
Ido recommend replacement of the injector assembly however.

check out this solution page for more info regarding this.

http://www.fixya.com/cars/t3218505-misfire_code_rough_idle_full_tune_up

Posted on Dec 04, 2010

  • 1915 Answers

SOURCE: Have a 2002 Mitsubishi Montero

check owners manual for fuse for emissions devices

Posted on Dec 23, 2010

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1 Answer

What's the symptoms of a bad egr valve in a 1989 Buick lasabre


They are more known for mass air sensor problems , you could remove egr valve. To check if it is closing you shouldn't be able to blow through it, they idle rough exhaust gas reborn valve , so they run bad when stuck open

Aug 08, 2016 | Buick Cars & Trucks

1 Answer

Symptoms bad egr valve


Bad EGR valves can cause surging issues but the check engine light would turn on to indicate the problem after a few hours of driving. I would suspect the injectors or an intake maniofold vacuum leak is present.

Jan 10, 2014 | Cars & Trucks

1 Answer

What is a p0404 code


P0404 - Exhaust Gas Recirculation Circuit Range/Performance
The EGR (Exhaust Gas Recirculation) system's purpose is to redirect exhaust gas back into the cylinders. Since exhaust gas is inert, it displaces oxygen and fuel, thereby lowering cylinder temps, which, in turn, lowers oxides of nitrogen emissions. For that reason it needs to be carefully metered into the cylinders (via the EGR valve) so as not to adversely affect the engine's performance. (Too much EGR and the engine won't idle).

If you have a P0404, then the EGR valve is likely an electrically controlled EGR valve instead of a vacuum controlled EGR valve. Also, the valve will usually have a feedback system built into it that informs the PCM (Powertrain Control Module) what position the valve is in; open, closed, or somewhere in between. The PCM needs to know this to determine whether or not the valve is operating as needed. If the PCM determines that the valve should be operating, but the feedback circuit shows that the valve is not open, this code will set. Or if the PCM determines the valve should be closed but the feedback signal indicates that the valve is open, this code will set.

Symptoms: There may be no symptoms of a P0404 DTC other than the MIL (malfunction indicator lamp) or check engine light. However, Exhaust Gas Recirculation systems are inherently problematic due to carbon buildup in the intake manifold, etc. This normal buildup can lodge in an EGR valve, holding it open when it should be closed. If this is the case, the engine may idle rough, or not at all. If the valve has failed and is NOT opening, then symptoms would be higher combustion temps and as a result, higher Nox emissions. But the latter symptoms aren't going to be noticeable to a driver.

Causes: Usually this code points to either carbon buildup or a bad EGR valve. However that doesn't rule out the following:
Open or short in the 5 Volt reference circuit
Open or short in the ground circuit
Open or short in the PCM controlled voltage circuit
Bad PCM (less likely)

Possible Solutions: Using a scan tool command the EGR valve to open while watching the actual EGR position (it will probably be labeled "desired EGR" or something similar). The actual EGR position should be very close to the "desired" EGR position. If it is, then the problem is likely intermittent. It may have been a lodged piece of carbon that has since dislodged, or it could be a bad EGR valve winding that intermittently opens or shorts as the valve temperature changes.
If the EGR "desired" position is not close to the "actual" position, then unplug the EGR sensor. Check for a good 5 Volt reference voltage to the connector. If it doesn't show a reference voltage, repair an open or short in the 5 Volt reference circuit.
If there is a 5 volt reference voltage, activate the EGR with the scanner, monitor the EGR ground circuit with a DVOM (Digital Volt/Ohm meter). It should indicate a good ground. If it doesn't then repair the ground circuit.
If there is a good ground, then check the control circuit. It should indicate voltage that varies according to the percentage that the EGR is open. As it's open more, the voltage should increase accordingly. If it does, then replace the EGR valve.
If the voltage doesn't increase incrementally, then repair open or short in EGR control circuit.


Hope this helps (remember to rate and comment this answer).

Jul 11, 2011 | 2003 Chevrolet Impala

2 Answers

Chevy 2002 Malibu ERG valve


Symptoms of a bad EGR valve are usually stumbling idle or the engine stalling when the car is warm (normal operating temperature). Find the EGR valve and locate the vacuum line attached to it. Start the engine cold and wait for it to warm up. When the engine starts to stumble, pull off the vacuum line. If the EGR is bad, the engine idle will stabilize and no longer stumble.

May 25, 2010 | 2002 Chevrolet Malibu

1 Answer

Intermittently won't hold idle and stalls


The symptom you describe can be caused by either a bad or dirty EGR vavle or a broken / defective vacuum line.

Try this
1. disconnect and plug off the EGR vacuum supply line

2. Connect a vacuum hose of equal size to the EGR valve.

3. Start vehicle

4. draw a vacuum on the line orally.

a. the engine should die or run really bad.

5. Restart vehicle and repeat checking for same result.

6. If EGR valve is performing correctly as stated in steps 4 and 5 thern you most likely have a bad / cracked / damaged vacuum line somewhere.

7. Reconnect original vacuum line to the EGR Valve

8. Locate source of Vacuum leak.

Jan 27, 2010 | 1995 Jeep Grand Cherokee

1 Answer

I have a 1997 dodge intrepid that i have been told the egr valve is bad...now my car hesitates, stalls or dies on me at random times. could this be the egr or something else?and also sometimes when it dies...


A bad EGR valve can definitely cause these symptoms, but would have nothing to do with the battery terminals. Unfortuneately, several other things can also cause these symptoms.

Jul 04, 2009 | 1997 Dodge Intrepid

1 Answer

Emissions Inspection Problem on 1998 3000gt. Gets a NO PASS/ NO FAIL. Not Ready Reading. What now? tks. JJ


you need a tune up. replace all spark plugs and spark plug wires.change air filter .make sure egr valve is working right.check oxygen sensor. check all vacuum lines.

Apr 21, 2009 | 1998 Mitsubishi 3000GT

2 Answers

Malfuntion light coming on...egr valve may need replaced


the range from a simple sensor issue with no symptom except a check eng light to a rough idle with a light.

Mar 20, 2009 | 2005 Dodge Grand Caravan

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