93 f-150 engine stalls - koer code 311

1993 ALL OTHER MAKES
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ROARGAN
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my f-150 has 150000 miles and recently started stalling when first started it acts flooded untill i rev it up hard then comes out of it. some days it will stall at every stop then run fine for up to a week. i ran the codes and 311 air system not functioning came up.
the air pump was noisy so i replaced it. the problem hasen't changed and the code is still there. could it be the air bypass valve and would this cause the stalling?
Oct 27, 2006 at 4:44 PM
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STEVE IN TENNESSEE
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did you ever resolve your code 311 issue? I have the same code and am looking for clues.
Thanks,
Steve (steve@soozfa.net)
Jan 14, 2012 at 12:59 AM
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CJ MEDEVAC
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I'M OT REL UP ON THESE COMPUTER RUN CARS

I DID LOCATE THE CODE MEANING:

AIR system not working - Single, Right or Rear HO2S - Air Injection

DOES THIS HELP YOU ANY?

THE MEDIC
Jan 14, 2012 at 5:10 AM
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STEVE IN TENNESSEE
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Thanks for the reply. Just wondering if you ever resolved the code? I'm beginning to believe the emission system is a boat anchor after a few years and does not contribute to performance with the exception of smog emission.
Jan 14, 2012 at 4:57 PM
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