is this an egr delete? (Page 2/3)
gregr75 JUL 09, 12:55 PM
Or I should say… DISABLING the EGR system due to dirty intakes, parts going bad seems like it would effect performance negatively without doing the chip mod.

DELETING seems the way to go with proper chip mod if you dont want to have those parts any longer.

I guess this is all a moot point anyway because in my case, I've decided to enable the EGR system back as I already bought the valve, I hope it doesn't create new problems with this particular car that I'm not aware of as I rebuild. Hopefully the PO was just looking for a shortcut versus the system was playing havoc with the car.
Vintage-Nut JUL 09, 05:00 PM
The EGR valve is there mainly to reduce emissions by reducing nitrogen oxides (NOx).

In California, a EGR valve is required to pass a smog inspection...
Patrick JUL 09, 06:20 PM

quote
Originally posted by gregr75:

I guess this is all a moot point anyway because in my case, I've decided to enable the EGR system back as I already bought the valve, I hope it doesn't create new problems with this particular car that I'm not aware of as I rebuild. Hopefully the PO was just looking for a shortcut versus the system was playing havoc with the car.



The EGR system does nothing to hamper performance, and it's possible it actually slightly improves gas mileage. Combine that with the fact that it also reduces harmful emissions... and it's a win-win situation to have a functional EGR.

Often, people will block the 2.8's EGR passages (as appears to be done with your engine) when the EGR pipe cracks and develops a leak... instead of doing the sensible thing and replacing the pipe. It sounds like you're going about this the right way.
buddycraigg JUL 09, 08:00 PM

quote
Originally posted by gregr75:
Thanks for the info Patrick, thats good to know.
Other than the intake getting dirty, is there a reason for disabling the EGR system?




quote
Originally posted by Patrick:
Often, people will block the 2.8's EGR passages (as appears to be done with your engine) when the EGR pipe cracks and develops a leak... instead of doing the sensible thing and replacing the pipe. It sounds like you're going about this the right way.



That is why I did it.
ketstang JUL 10, 07:59 AM
 

[This message has been edited by ketstang (edited 07-10-2023).]

Raydar JUL 10, 11:14 PM
Delete EGR or don't delete EGR. I don't care, one way or another. There are likely not enough of our cars still running to make a difference.

BUT... if you delete the EGR system, you need to have it programmed out of the chip.
Just blocking it off can cause high combustion temps, due to lean mixture and far advanced ignition timing. (I've seen the fueling and spark tables.)
Short term, maybe it'll ping. Long term, it can possibly burn holes in pistons. (I've seen a few.)
buddycraigg JUL 11, 10:48 PM

quote
Originally posted by Raydar:

Delete EGR or don't delete EGR. I don't care, one way or another. There are likely not enough of our cars still running to make a difference.

BUT... if you delete the EGR system, you need to have it programmed out of the chip.
Just blocking it off can cause high combustion temps, due to lean mixture and far advanced ignition timing. (I've seen the fueling and spark tables.)
Short term, maybe it'll ping. Long term, it can possibly burn holes in pistons. (I've seen a few.)



We will have to agree to disagree, but that's okay.
I've done it to many, and never saw a failure.
I believe I even made a post about it using a penny, or it might have been in my code 32 thread.
gregr75 JUL 12, 07:42 AM
Also another thing… There's only supposed to be one gasket for each joint, right?… It looks like the PO doubled up on gaskets for some reason. The joints I'm talking about are:

Exhaust pipe to EGR spacer
EGR spacer to EGR valve
EGR valve to EGR pipe
EGR pipe to intake
Vintage-Nut JUL 12, 10:17 AM
YES; One Gasket for EACH Joint:
One Gasket) Exhaust pipe to EGR Adapter / GM 10038299
One Gasket) EGR Adapter to EGR Valve / GM 10038298
Two Gaskets) EGR Tube / GM 10038300
gregr75 JUL 12, 11:24 AM
Thank you sir! much appreciate the links too!