EGR delete/shutoff @ the ECM?

[thetruckster]

So, can the EGR be deleted and or shut off at the ECM? If yes, approximately up to what model year? Oh, pushrod engine.

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[GhostGALA1]

Using HP Tuner I was able to completely delete the EGR in a 2004 Grand Am (LA1). I ended up using the EGR pintle position signal as a wideband O2 input for dataloging and tuning. Engine runs great and doesn't run any hotter than before!

[thetruckster]

Your combustion chamber temps will be higher. But that's good for a cleaner, more complete burn and NOx should go down. May even see a bit of mpg improvement.

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[GhostGALA1]

Now that you mention that I went back and looked at a few datalogs. The engine temps are up a few degrees. This would indicate a rise in combustion chamber temps as you mentioned. Still only gets up to 105/107°C sitting in a drive thru for 5-10min @ 32°C (ambient temperature). With my ram air the IATs hit 45-50°C at those same temperatures. I know before I added the ram air it could creep up north of 60-70°C at stop lights.

I have seen an increase of 50km/tank. Wasn't sure what to attribute that to. Could be a number of things, along with the EGR delete. Thanks for the information.

So what year ECU/ECM do you have? and do you have access to any ROM editing/ECU flashing software?

[thetruckster]

No prob. Things I been learning while being around diesels.
I don't currently have a 60°V6. Just asking key questions before I buy.
About a decade ago I used to be a reg around here. Knew one of the brass around here. But that was a lifetime ago. Don't even remember my old sign in stuff.

No, I don't have any flashing software. I counted on others for that.

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[robertisaar]

EGR does not increase a gasoline engine's combustion temps or end-result EGTs.... it causes both of them to be lowered significantly, which causes less NoX to be generated.

[GhostGALA1]

Agree 100%. That's what we are both saying.

We are saying that if you were to delete the EGR, the combustion temps will increase..... Slightly!

[bszopi]

No prob. Things I been learning while being around diesels.
I don't currently have a 60°V6. Just asking key questions before I buy.
About a decade ago I used to be a reg around here. Knew one of the brass around here. But that was a lifetime ago. Don't even remember my old sign in stuff.

No, I don't have any flashing software. I counted on others for that.

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Who'd you know? Most of the brass are still here, just not as active...

[thetruckster]

Ben, SappySE

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[bszopi]

Oh yeah, Ben is still around and still running WOT-Tech.

[thetruckster]

Oh ok. Not familiar with WOT-Tech.

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[bszopi]

http://wot-tech.com/shop/

[thetruckster]

<<<<Ben too.

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[thetruckster]

So, how new can I buy and still do, or have done, ECM tunes? I'm thinking a 3400 because I'm not familiar with anything newer.

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