Running a tune for a 2.4 but with a stock upper

[claybeatz]

2013 gt500, id1300x, Vmp baps, Jlt 123, whipple 68mm, off road x. As the title says, haven’t had the chance to put my 2.4 pulley back on but the tune is written for it, getting p0172 and p0175. Any chance the stock upper is the cause? I thought it wouldn’t be a problem until I get into boost.

Thanks in advance

 

[01yellercobra]

Out of boost pulley size shouldn't matter. I'd check the intake track.

 

[claybeatz]

Well, put on my 2.4 upper and it fixed it.

 

[01yellercobra]

Weird. Must be something with the newer cars being more sensitive.

 

[decipha]

only thing the pulley will affect at idle is bypass air

if changing the pulley clears a fuel fault then you have an air leak past the bypass or venting air somewhere

aint nuthin new about a 13

 

[claybeatz]

Well the fitting for the hose on back of the bps elbow is loose, gonna try to seal that up with some rtv. But the car runs great now with the 2.4 and back on e85