Exhaust Gas Recirculation..... to keep or not to keep

[yagsinairod]

your only problem is if it fails open and constantly is working. It happens from time to time, they can carbon up like that. But I don't think a new one is expensive. I've removed them a few times, but in the future I doubt I will... at least from lower performance motors.




Thanks for the insight.

have you replaced a new EGR off a obdII vehicle? They run up to 300 dollars.

 

[78Suburban]

wow, the poll is 50/50.. this seems to be a subject with no definitive answer

 

[ntsqd]

We are not talking specifically about an OBD II engine.

One of the advantages of a properly functioning EGR is that the inert gas effectively reduces the displacement of the engine, thereby reducing the required amount of fuel. Probably not enough to noticably affect the mileage though.
EGR got a bad name from systems that are in poor condition and operate when they should not, causing detonation.

 

[yagsinairod]

We are not talking specifically about an OBD II engine.

One of the advantages of a properly functioning EGR is that the inert gas effectively reduces the displacement of the engine, thereby reducing the required amount of fuel. Probably not enough to noticably affect the mileage though.
EGR got a bad name from systems that are in poor condition and operate when they should not, causing detonation.

OBDII and OBDI engines are the same. Im talking about the cost of an EGR valve from a OBDII vehicle.


EGR valve operating at the wrong time doesn't necessary cause detonation.

 

[sled_dog]

$55.49 on Autozone.com for a 1984 K5 Blazer with a 305(figure it a base for what is running around this forum, and I had one...)

Now for my 1997 C2500 pickup(read OBD II), $129.99.

For an 02 2500HD with the 6.0L gas motor(dad has an 04 but they don't list parts for those yet), $129.99.

Yeah I'm sure you can find more expensive ones, but this is a Chevy truck forum, why look at some Honda Civic or BMW to compare to when we are talking about Chevy trucks?

 

[gmtech954]

First off your egr will not cause any noticeable performance differences if functioning correctly. second if it gets plugged with carbon its like having a huge vac leak and the engine will stumble and be extremely lean. Third an obd II linear egr (which is on most new vehicles)does cost about 275 from gm (i work for a dealer and can give you part #s to verify)

 

[78Suburban]

so how often do they get plugged with carbon? is it common for them to jam open and act as a vaccum leak?

 

[SchnorrCS]

Don't know if this was already said or not, too lazy to read the whole thing, but I'll throw my .02 in anyway...

I have an 83 that the egr gasket blew out. Would Idle, wouldn't drive. If you take it off, be sure to plug everything, or it will run like S. If you keep it, use a new gasket and put on a new vacume line with some heat wrap to protect it so it won't leak. Personally, I take it off, but I hate them alot. Bad Tramatic EGR experience.

cS

 

[K5Chris]

keep it. no reason for me to elaborate, as sled dog has already explained it quite well.

 

[TheEmissary]

To pass the ASM sniffer - the EGR should be retained. I learned the hard way back in April 2004.

 

[78Suburban]

To pass the ASM sniffer - the EGR should be retained. I learned the hard way back in April 2004.

I just got a 911 address 2 years ago. The county below me does not have 911 and I suspect might have some inbreeding. So I don't have to pass emissions , but I may put it back on, just because it will be easy to do. If the valve messes up and gives me trouble, then I can take it off. I just don't want to make the motor run lean or crappy (what I have found it can do, from searching).
So, as of not, its going back on. but it may not stay there.
James