code 33 and 34

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Aug 6, 2015 | 01:08 PM

gspur1

Thread Starter

8th Gear

Joined: Mar 2015

Posts: 8

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code 33 and 34

have a 1985 vette got 33 and 34 code shy of replacing parts , some are expencive, what can i do to check first, and my maf relay and burn off are not 2 side by side relays behind the batt, there is a couple things on top of each other, but look nothing like what i see in pics, plus when i check maf relay at partsgeek or other it shows a small flat relay, and where is it.

thanks, used you guys a lot always helpful

Aug 6, 2015 | 01:37 PM

vader86

Team Owner

Joined: Sep 2001

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From: Athens AL

C7 of the Year - Unmodified Finalist 2021

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85's burnoff module is buried behind the center bezel, it does not have the two relays, that started in 86. You will need a shop manual with the procedure to test the MAF sensor and module specific to 1985.

Aug 7, 2015 | 02:54 AM

Cliff Harris

Race Director

Joined: Apr 2002

Posts: 10,036

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From: Anaheim CA

I would suspect a bad connection at the MAF. A corroded pin in the connector can cause your symptoms. You might have a problem in the wiring...

The 1985 MAF burnoff module has one relay in it that does both the MAF power and MAF burnoff functions. Here's a pic of the PC board:

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