Yes, that's the location/part. I did unplug it and there was little change, thus my thinking that maybe this is the problem. I will take the bypass hose off and clean. Does anyone know what test can be run on bypass device ? Thanks again for the help.

Sorry for delay in my update but life got in the way. Anyway, I replaced the fuel filter, relay and measured fuel pressure at the rail. Stayed at 50lbs the entire time I ran the car. However, still hesitates and dies when returning to idle. Funny no codes were returned and check engine light did not...

Thank you all. My model is a non turbo. I will let you know what I find at fuel rail.

Model year is 2000

S70, 230k miles. Original owner. A month ago the car went into limp home mode. I pulled the ETS and found the throttle plate barely moveable. This ETS was purchased Xemodex in 2013. As this unit had a Guarantee I returned and they rebuilt including paperwork showing the performance. Reinstalled, sta...