01SOMZ28

iTrader: (37)

SES light came on the other day and threw codes for both banks running lean. It also wants to die while sitting at a stop light, i have to keep my foot on the gas just a little bit. Never had this problem before and i'm not really sure what to look at first. Any help would be great!

flame

iTrader: (13)

Try unplugging the MAF and see if it runs better, Check fuel pressure and volume

CamaroSS22

iTrader: (1)

Yea I second the unplugging the maf and seeing what happens. Can you log your trims while cruising?

Camaropar

iTrader: (1)

check fuel pressure, check for vacuum leaks and intake cracks.

01SOMZ28

iTrader: (37)

I'll try uplugging the MAF and no i don't have a way of logging anything.

So, if i unplug the MAF and it runs better....then its the MAF?

eallanboggs

iTrader: (1)

P0171 and 174? Lean on both banks. What is common to both banks? What is lean? The EPA says >14.7 is lean. Too much air(unmetered) or not enough fuel(for the amount of metered air) will send you lean. Are you LTFTs maxed out to the + side? Propane the top end while watching the STFTs. If the problem is a leak you should find it. Your STFTs will momentarily spike when you hit a bad spot. Check fuel pressure and volume(at least a pint in 30 sec.).

flame

iTrader: (13)

Yes that would indicate a MAF problem. Could just be dirty which is common especially with K&N filters. The MAF is not measuring the air properly hence the computer doesn't provide the right amount of fuel.

The code setting criteria is the fuel trims adding 23% for at least 6 seconds