Hi,
Thanks... Believe it or not, that helps. When I listen to it stalling, the idle drops until it finally just stalls. I have a feeling we either have low fuel pressure or a big vacuum issue.
Have you confirmed fuel pressure? Also, have you checked the EGR to see if it holds a vacuum? Have you removed the EGR to see if it responds to vacuum?
If you remove the fuel cap from the filler tube, does that chance anything?
One thing I noticed, and correct me if I'm wrong, it takes two tries for it to run for any length of time. That is what is leading me to think low fuel pressure or fuel pressure drop off.
Let me know if you have done these things. Keep in mind, a stuck EGR or one that doesn't hold a vacuum can be causing this as well. However, by pressing the throttle, you should be able to keep it running. That takes me back to the fuel pressure possibility. Here is a link that shows in general how to test pressure:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
If you look below at the attachment, it provides the pressure/drop-off diagnostics specific to this vehicle. The directions indicate the use of a scan tool.
Let me know.
Joe
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Thursday, September 9th, 2021 AT 5:11 PM