C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

dtc 33

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Old Aug 6, 2015 | 09:55 PM
  #1  
chevyman_ky's Avatar
chevyman_ky
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From: cawood ky
Default dtc 33

I have a 85 vette, owned it for about 3 years. about 2 years ago started running bad and set dtc 33. replaced maf cleared code ran good for a while, put old maf back on ran good till a few weeks ago when I took it to the Somerset show let sit a few hours drove good for 40 miles let sit while we eat dinner then it ran good. put on another new maf sensor ran 2 miles light came on dtc 33 put old maf on ran good. ran diag. today to replace burn off module. any one know why the old maf will not set code but new one will? looking now for a burn off module.
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Old Aug 7, 2015 | 03:21 AM
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You will get an error code 33 if the MAF to ECM signal is lost, even if intermittently. Usually that is caused by a corroded pin the MAF connector, but could be a problem in the wiring.
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