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

C4 of Year Finalist (performance mods) 2019

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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