Hey guys, having some issues with stuttering and I'm almost certain it's fuel related. I'm running an aem ems and while on the dyno I had no issues and the car ran fine for a while but then the stuttering started. This happened before with an f20 and it was a matter of moving the wiring harness a different way and the idle would correct itself.

I've since put in an f22 and after the tune, it's happening again but this time I can't seem to get it to correct itself. When I drive and step in the gas, it stutters and on the plx wideband it goes lean.

I was messing around with the wires and at one point the car was at 17:1 and then full lean. I've since gotten it to around 13:1 but the when on throttle it still stutters.

My question really is what wire on the ecu harness might be loose that is causing me all this grief?

Any help would be appreciated!