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

MAF code 34 only when cold - 1987

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Old Jun 28, 2009 | 11:21 AM
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oldgreyvette
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Default MAF code 34 only when cold - 1987

My 87 gives a MAF code 34 when cold. It is OK (no Ck Eng Light) once it gets warm and is stopped and restarted. Until the code clears and it has been stopped and restarted it acts like it is running in "computer default" mode. The stop and start seem to allow it to get out of computer default and into normal computer mode. If it has not gotten warm enough the Ck Eng light returns when restarted.

The colder the weather is, the longer it takes to get warm enough to clear. In hot weather (hot garage) there is no code. Mild weather and it only takes a few blocks to get warm enough to clear. Cold weather and it may take several miles to get warm enough to clear.

Once it's clear everything is normal. Anybody seen this before?
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Old Jun 28, 2009 | 12:21 PM
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Try cleaning the MAF get some cleaner and spray it down if this takes care of it check your burn off realy. Make sure you get the MAF cleaner it's labled that way
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