Initially, I had trouble w/ the MAF sensor filament staying "ON" w/ the ignition off (Oh, and of course the car ran like crap). So, I figured the MAF Burn-off relay was stuck in the closed/on position. Put a new Burn-off relay in and that fixed the filament problem, but I am setting a code 33 even after clearing the codes from the computer.
Any ideas, suggestions?

Thanks,
Neil

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Neil's 383 IROC-Z: TPIS MiniRamIII / GM FastBurn heads / Strange 12Bolt Diff./ Neil's Home-Built BulletProof 700R4+Vigilante 2800 stall converter.

 

Code 33: High voltage (low vacuum) at mass air flow sensor.

Check the TPS voltage, it should be .54VDC.
Change all the relays, and if u keep getting it, u need a new MAF. Have u modded it??

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Looking For:

87 IROC-Z 350 TPI
84 TRANS AM 305 H.O.

[This message has been edited by IROCZTWENTYGR8 (edited March 02, 2001).]

 

I had the same hard 33 code. This happened after I replaced the MAF and swapped relays.

Turned out that one of the female sockets on the MAF weatherpack was bent slightly out, so it was only making partial contact. I have a temporary fix on it, but I need to replace the connector.

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89 Firebird Formula
WS6 package,ZZ4 Crate engine
SLP 58MM TB, Edelbrock TES Headers
Random Tech 3" cat, SLP 3" stainless exhaust
9 bolt rear, Hotchiss swing arms, Lakewood panhard rod
Corvette 2/4 servo, kevlar band, full poly rear.
Centerline 16x8 rims, B.F Goodrich drag radials