!st Gen V6 Surging issue

I have a 2004 V6 SR5 that has a surging issue but w/ no check engine light. I replaced a ton of stuff, mass air flow sensor, throttle body w/TPS, spark plugs, 02 sensors (both banks), no vacuum leaks that I can find. I ended up taking it in to Atkins Kroll Toyota and they couldn't figure it out either. (thought maybe I got a back Throttle Body off Ebay). Im stumped hope to get some help on here and lend it where I can. Thank you.

 

Can you describe the "surging issue" conditions? "Surging" can mean different things to different people. Does this "surging" problem occur only on acceleration, or constant on/off while cruising, on/off at idle, etc...?

My first thought is an intermittent vacuum leak. If that is true, then occurrence is likely to be random. Modern vehicles have about a mile of small diameter vacuum hose underhood for all the environmental controls. Historically, Toyotas come with great rubber, but nothing lasts forever.

 

Thanks John yeah there’s a very small hunt at idle and then through out acceleration it has like an even surge through the power band. I wouldn’t call is a hesitation just due to it having no problem going from stop to start as with a fuel delivery Issue. It’s gotta be a vacuum leak I’m thinking or a sensor fault but no luck with either of those. And I would figure that Toyota would have been able to locate a vacuum leak.

 

The surge is like a shuttle jerky ness through out acceleration, I’m going to try and upload a video

 

Fuel filter? Fuel Regulator? IAC problems?

https://youtu.be/GVWCCjZBfGM