Lean tune issues

[lapointebrett]

I recently rebuilt my motor and swapped over to speed density when putting everything back together, I'm using a 4bar Omni power MAP and GM IAT. My tuner came and put a tune on my car for the speed density conversion. After a while he got the tune dialed in I was even doing short pulls in my neighborhood to get some break in on the new build. After we were finished driving he saved the tune and I thought all was good.

The next day I went to drive the car and after starting up the idle would slowly get more lean until the car would drop RPMs and not want to run. It also acts super lean during any throttle causing it to feel spuddery and barely accelerate.

Does anyone know what could have possibly happened overnight?

This really has me stumped because I'm not super knowledgeable on tuning so this is very frustrating to have happen especially after my second rebuild. I just want to be about to drive my car, any help would be appreciated.

 

[lapointebrett]

I recently rebuilt my motor and swapped over to speed density when putting everything back together, I'm using a 4bar Omni power map and gm iat. My tuner came and put a tune on my car for the speed density conversion. After a while he got the tune dialed in I was even doing short pulls in my neighborhood to get some break in on the new build. After we were finished driving he saved the tune and I thought all was good. The next day I went to drive the car and after starting up the idle would slowly get more lean until the car would drop rpms and not want to run, it also acts super lean during any throttle causing it to feel spuddery and barely accelerate. Does anyone know what could have possibly happened overnight, this really has me stumped because I'm not super knowledgeable on tuning so this is very frustrating to have happen especially after my second rebuild, I just want to be about to drive my car, any help would be appreciated.

I forgot to mention I am running ecmlink

 

[steve]

Until you provide a profile and post a log there isn't much to work with here.