- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Usually it's the solenoid that supplies vacuum to the EGR that fails. Trace the EGR vacuum supply line back to the solenoid and test it to make sure it clicks, allowing vacuum to flow to the EGR valve. If it doesn't click when current is applied to it, replace it.
Should have noting to do with the fans.
EGR is Exhaust Gas Recirculation. Without getting too technical, The EGR opens at cruising speeds and adds a small amount of exhaust gas to the intake manifold. From there it gets back into the combustion chambers to lower their tempatures thus lower emissions.
Jose, I don't know if this will give you the answer you are looking for because there are many things to consider here. The exhaust gas recirculation valve (EGR) is one of the main things involved in reducing NO emissions. This valve is controled by the power control module. (PCM) This is your vehicles computer. The PCM monitors the vehicles speed and will command the EGR to open when the vehicle attains a certain speed, which is why the ASM test being done is recorded at two different speeds. At 25 MPH your vehicle failed the hydrocarbon (HC) emissions limit and this could be for a number of reasons. When is the last time you car was tuned up? Old spark plugs, wires, clogged air filters, oxygen sensors, leaking injectors (personal experience) or the PCV valve could be contributing to the results of the test. I guess that the easiest way to go is to tune up the engine replacing the spark plugs, wires, air filter and the PCV valve and don't forget to have the oil changed at the same time. Only then should have the vehicle retested and see what the results are. Should it fail again you may have to consider having the EGR or the catalytic converter replaced depending on what portion of the test fails. If the NO fails I would consider the EGR. If the HC fails then I would consider the catalytic converter. Good luck with this.
The EGR valve helps your car more efficiently and completely burn fuel
by recirculating a portion of your exhaust and running it through the
combustion process again. When the EGR valve goes bad, it must be replaced.
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. The exhaust your EGR valve recirculates also prevents the
formation of Nitrogen related gases. These are referred to as NOX
emissions, and are a common cause for failing emissions testing.
Unfortunately, your EGR valve can get stuck, causing NOX gases to build
up. You'll know if your EGR valve is stuck or malfunctioning because
your car will experience symptoms like rough idle and bucking on
Here is a picture of where the EGR
Valve is located (Accord 1999). Replacing it is fairly simple and straightforward. A
vacuum line and a couple of bolts. You'll see what you have to do when
you look at it.
are replacing the EGR Valve due to the Check Engine Light (MIL) being
on with a DTC P0401 then I suggest contacting your Honda Dealer. There
was a Product Update Campaign (PUD) in the fall of 1999 that corrected
Another times, the clean is the solution...I hope help yoiu with this. Good luck, and remember rated this help.