A/F went from 14.4 to 15.7. HELP!

[Flash]

I installed my Dejon Tool upper I/C pipes and for about the first week my A/F was at 14.8. Before I installed the pipes it was solid at 14.4. And two weeks later my A/F is at 15.7!!! What could be wrong? How do I fix it?

 

[boostedinaz]

What are you using to determine the A/F ratio and is this at idle or WOT ( I hope not)? We need more info then this. i am guesing by your profile that you are using that disco light gauge. That is about as accurate as me smelling you exhaust and saying 13.8. A wide band will let you know alot better. Also, that number will fluctuate at idle and cruise speeds, the only time it will go rich or lean is when you go to open loop(floor it) or let off the gas on decel.

Michael

 

[Flash]

I'm using my Apex TT. And this is when I'm just cruisin' along at the 45 mph speed limit and at idle.
I'll try WOT and I'll report back