Running lean intermittently

[bfoos59]

my 07 GT500 keeps throwing 171 and 174 codes—not all the time but intermittently. I’ve cleaned the MAF sensor, but that doesn’t help. Suggestions?

 

[merkyworks]

clogged or faulty injector?

 

[fullboogie]

Original O2 sensors?

 

[Sielmo]

I've been doing some homework myself as well. Could be a few things but start with the obvious and what was modified/messed with last. Evap components, fuel pressure reg, are not off the list but further down.

 

[gtt500]

What cold air intake, supercharger and hood are you using?

 

[gimmie11s]

What do the plugs look like? Is the car stock? Mods?

Nowhere near enough info provided to help you.

 

[2011 gtcs]

You probably have a air leak after the MAF somewhere.

 

[VNMOUS1]

Look at your short term fuel trims. Less than 10 pct correction? Less than 5 pct bank to bank disparity? Then it's unlikely that you have a configuration/equipment problem.

As your tuner to look at the logs.

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