Running lean
08-25-2006, 09:47 AM
#1
Running lean
SES = Lean bank 1 and 2
any ideas, no detonation so Ive been drivin it. I changed the fuel filter too, since I upgraded to 44lb injectors, so I wanted to make sure it got there asap. But before I pay for a SnapOn tool to read exactly what it is, I figured Id get some ideas.
any ideas, no detonation so Ive been drivin it. I changed the fuel filter too, since I upgraded to 44lb injectors, so I wanted to make sure it got there asap. But before I pay for a SnapOn tool to read exactly what it is, I figured Id get some ideas.
08-28-2006, 06:17 PM
#4
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well, i just had a similar problem but the other way. mine kept tripping system too rich bank 1 and bank 2. when both banks go, it's usually the maf or the fuel pressure reg. It turned out that my k&n had too much oil and it coated my MAF with a thin layer. the sensor read crazy and messed with my a/f. I guess it could go lean too. I fixed mine with a can of sensitive electrical parts cleaner. but if you try it, be sure to let it dry out good before you run it! cured mine, just an idea. I guess both 02's could go bad at the same time, but not very common.
08-28-2006, 08:55 PM
#6
Originally Posted by redwagon
well, i just had a similar problem but the other way. mine kept tripping system too rich bank 1 and bank 2. when both banks go, it's usually the maf or the fuel pressure reg. It turned out that my k&n had too much oil and it coated my MAF with a thin layer. the sensor read crazy and messed with my a/f. I guess it could go lean too. I fixed mine with a can of sensitive electrical parts cleaner. but if you try it, be sure to let it dry out good before you run it! cured mine, just an idea. I guess both 02's could go bad at the same time, but not very common.
You recently did a 6.0 swap correct? Might want to check for vacuum leaks or unmetered air getting in to the induction system also.
08-28-2006, 09:21 PM
#7
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I'm with Bud...Check for vacuum leaks or a dirty MAF from an over oiled K&N. A big exhaust leak will cause the O2's to read lean as well. Good luck!!
Dave
Dave
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08-28-2006, 09:32 PM
#8
Originally Posted by budhayes3
...the MAF sensor is pretty common for setting lean codes (on a few different manufacturers), you could check there first.
You recently did a 6.0 swap correct? Might want to check for vacuum leaks or unmetered air getting in to the induction system also.
You recently did a 6.0 swap correct? Might want to check for vacuum leaks or unmetered air getting in to the induction system also.
Very good Points.
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