I'm getting the ECU code 03 02 and it says "EGR System Hi/Low Flow"

I have no ****ing clue what the EGR is and nobody on here seems to have a damn clue either

 

Exhaust gas recirculation, i am pretty sure thats what it means what it does i guess recirculates exhaust gas if that helps any.

 

Well I'm a bit better off than I was before. Thanks

 

Its the exhaust gas recirculator, just like Maxine said. What it does is add small amounts of exhaust gases into the intake air. This reduces emissions and detonation.

Taken from DomesticTunerz.com
Exhaust Gas Recirculator(EGR):
The EGR valves primary purpose is NOT to reuse unburned fuel as is commonly thought. The EGR's purpose is to cool the combustion event, thereby reducing NOX emissions. It does this by introducing exhaust particles into the intake stream, allowing advanced timing by adding broken down and expended fuel atoms which will not burn again. This reduction in the ammount of a useable air/fuel charge reduces combustion temperatures. This results in higher fuel mileage, especially during extended periods at cruise speeds. Other benefits are more advanced timing resulting in more power. There is a tradeoff here which i'll get into in a minute. The downsides to the EGR are it will, over time, gunk up the intake tract of the engine severely, especially if the valve sticks open, allowing extreme ammounts of exhaust gas into the intake.

The benefits of blocking off the EGR are a cleaner intake charge, and more power as the computer will generally speaking, still advance timing as if the EGR is enabled, however this can lead to detonation, increased NOX emissions, and in severe cases, can literally melt the exhaust valves. In most cases, blocking off/removing the EGR will have no ill effects that are measurable, nor will it cause long term damage to the engine. Newer engines are no longer coming with EGR valves as better methods of fuel and ignition system control are becoming available, and the days of detrimentally fluctuating fuel mixtures are pretty much over.

 

Oh my gess is yours is clogged.

 

[QUOTE=Maxima10to1]Its the exhaust gas recirculator, just like Maxine said. What it does is add small amounts of exhaust gases into the intake air. This reduces emissions and detonation.

[QUOTE]

Thank you very much, very helpful.

Any suggestions on cleaning it out?

And where exactly is it so I might remove it?

 

Your guess is as good as mine seek your haynes book if you have one

 

yeah where the hell is this thing??!!??!?!!?

 

i'm having the exact same problem you are having...the EGR system code came up in my car last week. My dad showed me where it is, but i forgot lol I'll ask him again and i'll tell you where it is...and what i'm going to do to fix it. Stay in touch

 

k i just returned from my dad's shop...it's located up under the throttle body with a big hex shaped nut on top of it. it's gold in color. hope this helps!

 

check this out->>> http://216.239.53.104/search?q=cache...hl=en&ie=UTF-8

 

This is a little misleading...

Newer engines, such as the VQ35 and QR25 from Nissan, still make use of EGR for emissions control. They do not have a valve that lets exhaust back into the intake tract, though. They use their computer controlled variable cam timing to increase valve overlap and low engine speeds and loads. This allows some exhuast gas to be sucked back into the combustion chamber through the exhaust valves.

This strategy was the source of the unusually high oil consumption in some early QR25 engines. The QR25 features a catalyst that is very close the exhaust valves, for quick light off. The high temps that it experienced at this location caused the ceramic substrate of the catalyst to break down. When the EGR was in use, pieces of this ceramic were being sucked back into the combustion chamber. This scored the cylinder walls, resulting is high oil consumption.


Just a little FYI.

 

I keep on getting EGR code as well. I have the complete assembly sitting in my garage, but to install that big mushroom while the engine is on the car. hell ooh no. I ll just do what was posted above clean it out.

Syphic thanks for that link. That was very helpful!

Jaime

 

Rtfm

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