air to fuel gauge ratio question?

[AN89HATCH]

I have had my air to fuel gauge in the car for about a week, and it worked fine, bouncing the light back and fourth etc. today i took off my stock manifold, to fit the turbo manifold, and i put the stock one back on, and I now have a huge exhaust leak from the manifold. I start the car and my air to fuel ratio gauge just stays on lean, it dosnt even bounce any mroe. is this acurate? or is something wrong?

[Silverbullet91]

I don't think there's anyway you're gonna get an accurate afr reading if the exhaust manifold is leaking. My guess would be that outside air is getting pulled INTO the manifold and causing the lean reading. Why is the manifold leaking? Bad gasket?

[mackdaddy240]

Hate to jump into the thread but I put a AFC on mine and it seems to be working ok bouncing back and forth, but from time to time it will go all the way lean and then the light just goes out for a second then it comes back like nothing happend. Any idea, you think its actually acurate because I have my doubts.