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How do you clean a EGR Valve on a 1996 Geo Prizm

Check engine light stays on, EGR Valve needs to be cleaned

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You clean the passages & replace the valve

Posted on Nov 29, 2012


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Posted on Jan 02, 2017

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SOURCE: where is my egr valve

Oks it should be close to fire wall it looks around 3 inches oval shaped and has 2 bolts in it and has a gasket plus it has a wired connector to it so you should replace the gasket after you clean it/ so tak it out and use carb cleaner any kind / Put an ew gasket on after you klean it and plug it back in try that/ Please rate my response/ Thank you very much

Posted on Jan 29, 2009

  • 1 Answer

SOURCE: transmission filter 2003 Mitsubishi Lancer

tans. filter is right under the engine on the passanger side. but u dont have to replace it.b'cause its made of steel meche.just flush talk to the expert.

Posted on Jul 20, 2008

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SOURCE: egr valve insufficient flow detected

You probably pulled a code p0401, insufficient egr flow. Your DPFE sensor is more than likely at fault. There has been a lot of trouble with these sensors. Then reset CEL or disconnect battery for 5 minutes.

Posted on Aug 17, 2008

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SOURCE: how do you clean the egr valve on 99 pontiac montana

You would need to remove it and look into the passage that is covered in black soot. there is usually a little poppet that moves up and down to allow the exhaust gas to pass thru it, some are vacuum operated and some are electric. you can push the poppet open and scrape out the carbon with a little screw driver, generally they dont get all that pluged up on newer cars. I looked at a picture of yours at auto It appears yours is electrically actuated. If either the electric actuator or the position feedback in the valve are bad you would need to replace it. You could attempt to clean it and move the poppet up and down it could just be stuck

Posted on Jun 21, 2009

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SOURCE: how to clean/check the egr valve

When the EGR VALVE is clogged or malfunctioning, it can cause irregularities in engine performance such as rough idling or valve knock, indicating that the EGR valve should be inspected.
The EGR valve works by routing a small amount of exhaust back into the combustion chamber. When the temperature in the combustion chamber is too high, nitrogen oxides are produced, which combine with elements in the atmosphere to form smog. Introducing a small amount of exhaust into the system reduces the temperature in the combustion chamber, reducing the amount of nitrogen oxides produced.

Many EGR valves are mechanical, and simply have a small valve which opens to allow exhaust into the combustion chamber and closes when it is not necessary, and to keep the air mixture optimal for combustion. Some mechanical versions will not open until there is sufficient back pressure, ensuring that the valve will not be open when the engine is idle or warming up and needs a higher concentration of oxigen for combustion. Electronic EGR valves are also available, and use electronics to regulate the valve.

If the EGR valve is stuck open, it will essentially cause a vacuum leak, leading to inefficient combustion, rough idling, hesitation, and sometimes stalling in extreme cases. This is because the car cannot combust on carbon dioxide from the tailpipe — it needs atmospheric oxygen. If the combustion chamber is flooded with exhaust from an open EGR valve, it will not function properly. To check and see if the EGR valve is stuck open, have someone idle a parked vehicle with the brake on while you examine the plunger shaft to see if it is stuck open.
If the EGR valve is stuck closed, emissions of nitrogen oxides will rise, and the car may start to knock. Spark knock happens when the fuel mixture in the combustion chamber ignites before it has been reached by the explosion in the cylinder, resulting in a disruption of the engine timing. In this instance, the engine should be warmed up and revved to see if the EGR valve will move.

In both cases, simple repairs are possible. The EGR valve can be clogged, and a simple cleaning of a mechanical EGR valve may solve the problem. In the case of an electrically controlled EGR valve or a more complex mechanical problem, replacement of the valve may be needed. The EGR valve is an expensive motor vehicle component, and care should be taken to ensure that it needs to be replaced rather than repaired. A reputable mechanic should advise you appropriately.

Failure to repair or replace the EGR valve will not lead to a life threatening condition, although it will reduce the life of your car and increase the potential emissions. Especially in areas which require smog testing, an automobile with a malfunctioning EGR valve may not pass

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Posted on Mar 18, 2010

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2 Answers

Idle drops when i turn on lights or brake

GEO what, must we guess the car.
and then with that we guess 10 engines? really?
all we know brett is its a GEO XXXXX
1993 (other post, discloses its a 1993 and NOTHING else.)

what year did it last run ok. 1994?
ever heard of a cell phone camera and post a photo of car
and one of engine.


Apr 24, 2016 | Cars & Trucks

1 Answer

Engine light is on code reads p0403 egr valve cleaned light is now it back on any ideas please..

do you have stalling or misfire or rough idling problem? if yes probably egr valve stuck open. or just socket for egr valve is problematic. check for broken wires too.

Nov 16, 2011 | 1995 Geo Prizm

1 Answer

I replaced the EGR valve on the car and now have an error code indicating "EGR valve insufficient air flow..." I cleaned out a lot of carbon and junk that I could reach with a short piece of wire...

The air flow through the EGR is usually detected by a DPFE (differential Pressure Feedback Exhaust) sensor. The DPFE is connected by two pipes/ports on the exhaust feed pipe leading to the EGR. This sensor measures the pressure difference (differential) in the two pipes when the EGR is open; the more open the EGR the more the pressure imbalance detected by the DPFE. If the pipes/ports to the DPFE become clogged or the sensor malfunctions, the signal to the ECU will be seen as incorrect as compared to how much the EGR has opened...'insufficient air flow'. It is just as likely for the DPFE to fail as the EGR when there are 'EGR problems' . Hope this gives you another thing to check

Sep 21, 2011 | 1996 Geo Prizm

1 Answer

The check engine light is on and the code is narrow passage in EGR. Would like step by step for checking valve and removing and cleaning if possible. 1996 A6 Quattro Avant

Disconnect first the vacuum line from the EGR valve. Connect a hose to the EGR and cover it or **** on the hose.

IF the engine stumbles the passages are ok, you may just want to check the vacuum lines or the sensors itself. Otherwise try cleaning the EGR with cleaning spray before replacing.

May 05, 2011 | 1996 Audi A6

1 Answer

I have a 1996 geo tracker that the code reader says has an EGR valve problem. I have read about the cleaning the out the port? going to it. Is it possible or likely that this port? fouling is really the...

Had same problem and cleaning out port where the exhaust tube enters the intake solved the problem. This tube runs from near the EGR valve up to the intake. Two 10mm bolts on each end. Simple fix and cost is only time. 15min.

Nov 26, 2010 | 1996 Geo Tracker 2 Door

2 Answers

When accelerating while lightly pushing the gas pedal the engine runs great but when you giv it a little gas the engine sputter and boggs down until you let up a little on the gas then runs fine. need...

their are a few different things that can cause ur problem but usually the main one is the fuel filter others are dirty clogged air filter -partial clogged pcv valve-partial clogged cat converter -carbon build up on egr valve -for the pcv try cleaning with a carb cleaner -same for egr valve clean carbon build up -as for cat converter have some one raise idle while u feel for exhaust if feels weak or sounds like blockage look to see also if glowing bright red this usually shows a clog or partial clog in exhaust system[cat going also if smells like rotten eggs possible cat conv problem] good luck

Nov 08, 2010 | 1991 Geo Prizm

1 Answer

Engine light on my 96 Geo Prizm

Cant know until you have a code to look at. Take it down to your local autozone pepboys or O'reilly's auto parts stores, they will read the codes for you free of charge

Apr 26, 2010 | 1996 Geo Prizm

1 Answer

1996 Goe Prizm 1.6 P401

my first car was a 69 dart with 340 hi pro 4 speed bad *** car

Dec 20, 2008 | 1995 Geo Prizm

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