Possible vacuum leak? (Running lean and high fuel trims)

[nickw14]

Hi guys. So to preface, I was at a drifting event last weekend when this issue first appeared. After I spun out once the car had trouble starting again (this is kinda normal, so I wasn't worried about it). However, after I exited the track and was looking at some stats like AFR and fuel trims, they went crazy.

Now, almost a week later, the issue has still not resolved itself. My AFR is consistently between ~18 and 20:1 and my fuel trims are +35%. I flashed the stock tune back and the car won't even run right. It will start and then die almost immediately unless I give it gas to keep the RPM's up.

I took it to the dealership today but they told me they couldn't do anything until tomorrow morning. So I figured I would ask you guys before actually taking it to them to see if I can figure it out myself.

Notes:
The car is NOT boosted
Using an edited OFT tune
MAF is scaled properly

[nickmerronesucks]

Check the Evap line under the intake manifold. I know your not boosted. but my car acted the exact same way when the line popped off.(I am boosted) the line is on very loose from the factory.

[nickw14]

Originally Posted by nickmerronesucks

Check the Evap line under the intake manifold. I know your not boosted. but my car acted the exact same way when the line popped off.(I am boosted) the line is on very loose from the factory.

One of these lines?

[nickmerronesucks]

Noo reach your hand under the intake manifold behind the ac compressor and feel around

Sent from my SPH-L720T using Tapatalk

[nickw14]

Originally Posted by nickmerronesucks

Noo reach your hand under the intake manifold behind the ac compressor and feel around

Sent from my SPH-L720T using Tapatalk

That's exactly what it was. Right underneath the manifold there was a line that came off

Thanks!

[nickmerronesucks]

Originally Posted by nickw14

That's exactly what it was. Right underneath the manifold there was a line that came off

Thanks!

Sweet glad I can help...Look out NA guys! everyone needs to clamp them now..I still need to put hose clamps on mine. they come off often.

[GPhilly]

I apologize for reviving this post but where are each of the locations a vacuum leak can occur? I am going to check the hose behind the AC compressor later today to see if it is my issue. I hear the noise but can't locate where its coming from over the sound of the engine.

My setup has the Edelbrock Supercharger.