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

MAF senor

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Old Jul 20, 2007 | 03:57 PM
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Default MAF senor

I have an 88 vette and the SES light came on and it came up with a code 33..well my mechanic checked everything and determined that the problem would lie with the MAF sensor so I decided to put an aftermarket MAF sensor and now it is giving me a Code 34...My mechanic insists that the replacement MAF sensor is faulty...What would be causing this??..Is it the sensor or is it some other problem..He's checked the connectors, wiring, relay and everything else imaginable..Would I do better going with a brand new factory sensor??
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Old Jul 20, 2007 | 04:02 PM
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From: Austin Texas
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For your 88, what is the difference between code33 and code34 ?

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Old Jul 20, 2007 | 04:07 PM
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I believe 33 is MAF sensor High voltage and 34 MAF sensor low voltage
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Old Jul 20, 2007 | 05:06 PM
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From: shapleigh maine
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the test sequence for code 34 is pretty straight foward, and doesn't leave much room for guesswork. get a fsm. simply put unplug the maf and if code 33 sets then the maf is no good.
good luck
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Old Jul 20, 2007 | 06:03 PM
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From: SpringHill florida
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are the after market one's good for hp
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Old Jul 20, 2007 | 09:11 PM
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Yes whent the MAF sensor is plugged it showed a Code 34 and unplugged it showed a Code 33..So it is the sensor..So my question is whether the Vettes have a problem with aftermarket MAF sensors (in this case I got a faulty one) or should I go directly to a factory MAF sensor....Thanks for all of your responses!

Last edited by twferg73; Jul 20, 2007 at 09:14 PM. Reason: wrong spelling
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