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I'll take a second look and try to nail down some part numbers tonight, for now here is the video of how bad the chatter on the valve was.
https://streamable.com/x9awml

Thanks for all your help TheMechanic. I grabbed two junkyard EGR's over the weekend for about $8.00 apiece, and put the better of the two on my car, lo and behold the issue went away. 130006
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Oddly enough after reviewing the Log from my drive into work, the strange spikes on the generic O2 were there, until i adjusted the scale, then they disappeared. Looks like it might be an display...

Hi all,

I had a question about how the scanner reads O2 sensors. I have a 2004 Chevy Monte Carlo LS with a 3.4 that I am troubleshooting an EGR issue with. It may be that I have a stray voltage...

Wasn't the linear pot. Took the EGR apart today and it actually has a hall effect sensor in the Delphi model i bought, not a linear potentiometer. My next step is to try to source an OE EGR from a...

I'm only seeing min temp to enable EGR diagnostics. That's ok. I'm starting to suspect that the Linear Pot in the EGR valve is fouled.

I failed to remember how much the evap would put back into the intake, and i had just filled gas, so likely the extra fuel was from the EVAP canister. Though I did have one other question. I went...

Thanks, Looks like I am one behind on the calibration, its showing Cal ID: 12587799, which is one behind the current one of Cal ID:12618869. Which means i do not have the P0449 update, though i have...

I pulled the calibration ID, thank you for that btw, no mention in the notes about EGR however. Would I need to take it to a dealership to verify that I had the correct calibration for the PCM? I...

Hi all, still having a touch of an issue. I got a replacement EGR, still having the same issue. The reported position of the EGR is all over the place, Oscillating from way open to way closed, even...

Yeah its a lateral V6 with a crossover pipe and only a single set of O2 sensors. I did check the fuel pressure, 50 PSI with the vacuum line off the regulator, and 40 PSI with it on. Leaked down to...

Yeah, I set up an RMA for the part, though i gotta buy new then get a refund once they receive it back. I wasn't aware at first but this ECU does allow you to track the commanded position, actual...

Hi All,

I'm doing some diagnostic info on my 2004 Monte Carlo LS with a 3.4L. Has 270k miles, so alot of things likely need replacing. I'm going through and trying to make sure that everything is...