That sounds good. This morning, I had the stumbling/surging issues again...So, it's not related to my fuel system, as it now has a new FP and the filter if farely new. Maybe I'll take some pics of my Evap, and that will help us visually. I'll try to do so tonight. Thanks again for the offer. Gotta get this fixed, and this will set my mind at ease, and hopefully at least eliminate a possible cause. I have an ex that has a 2000 4runner, and I'm trying to convince her to let me have it for a night. I figure I can swap sensors one at a time and that will be the best diagnostic route I can do without being able to connect to the ECU.