Z28Camaro97

my 97 Z28 Camaro is throwing lean codes on both banks does anyone know what the source of this problem could be? Any help is appreciated.

3 pedal SS

iTrader: (1)

Check the rubber intake elbow before the throttle body. They get torn or crack with age. Also may not be installed right.

jaycenk

iTrader: (1)

exhaust leaks before and directly after the O2 can cause a fauls lean. Usually don't see it on both banks though unless both backs have leaks.

blue94

iTrader: (7)

most likely it is unmetered air getting in to the engine after the MAF. Get some starting fluid and spray it around underhood with the engine idling. If the idle raises up, than there is a leak somewhere allowing the engine to pull in outside air and the starting fluid.