Running lean on both banks and idle issues
#1
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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!
#6
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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.).
#7
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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
The code setting criteria is the fuel trims adding 23% for at least 6 seconds