I hope we get a solid resolution on this problem! Please report back what you find!

In an effort to think outside the box, I'm wondering if those without catch cans might be more susceptible to this issue in a FI engine? Fouling of the throttle sensors?

It feels like something either tricking the TPSs or they are getting an incorrect or fluctuated current. But I could be way wrong :/

Do you have the new Stillen extension cables?

I also had this problem recently...it happened to be my pins on MAF1 going to Bank 1, right at the end of the pig tail. Apparently when using the Stillen Extension Cables on the original Stillen set up (A2W) it had widen the gap on the original MAF harness pins under the pigtail. Due to the new piping I only used the Stillen extensin cable on one of the MAF sensors (Bank 2). After straightening out the pins I was back in business. The loose/misaligned pins on the MAF pins was tripping out the MAF readings thus throwing the AFR'S and Idle.all over the place.

I have spare sets of Brand New Gen2 Stillen MAF cables. Just FYI.

After A2A you only using 1 extension? I am still using 2?? One to the upper MAF and one to that Throttle body.

Also guys, another reason I am thinking may be a vacuum leak. Anyone know a good way to do a vac test with the A2A setup?

smoke test should work or while idling spray carb clean/ brake clean around

I plan on spraying my TBs and Manifold just to make sure, but Im still trying to figure out a way to smoke test the system. I would have to plug the BPV and the SC inlet no?

Id test the Maf sensors too. The gasket can easily get crimped and cause a leak. Ive seen it a few times already, including my own build once.

You dont have to use smoke. Just use pressurized air. I can send a pic of the adapter to build for like $5. Then just clamp it in where the L pipe clamps into the Tial pipe and pressurize it to about 5 psi. You need to make sure your at TDC (top dead center).

Yes please send me some info on this! :tup:

And referring to the MAF gasket...... I am actually missing a MAF gasket completely on one of my MAFs...

Lol...Wellllll.....

I don't know why I didn't catch this when installing the MAFs I don't think this will cure my issue though

Update: Had a spare MAF sensor so I just got the gasket from that one, no change in drivability. Still super jerky under light throttle load.

My new stillen cables will be delivered this afternoon, hoping for good results! If not I am going to get the CJM fuel return system and see if swapping out the pump along with it cures the issue.