My car started running rough. It stumbles and runs lean while idling and any acceleration. I can drive it down the highway at 70 and it runs fine at 15.0 afr but if i accelerate any at all it runs lean at 17.0 I was wondering if it may be my mas sensor or possibly my o2 sensors. any suggestions. its a 2000 ta ls1.

 

It just through codes ,p0131, p0171,p0174, p0506. if that helps out.

 

Thanks everyone it was the mass airflow censer. I fixed it.