im getting a code 33.. but my car runs and idles normally unless i hit the gas really hard, then the engine pretty much dies, or comes close to it . how can i be sure it's the MAF sensor? what else can it be? thanks for your time

 

Check the MAF wiring connections to the MAF for corrosion and good connection.

Check for tight air connections between Air Filter Cannister to MAF to MAF Airbox to TB Bellows to TB making sure you have no leaks.

Unhook battery for 5 minutes the reconnect and check for codes.

Still have 33, then change the MAF Power Relay located on the firewall near brake booster. 10 bucks. While your at it you probably should change the MAF Burnoff Relay (same part #) and the Fuel Pump Relay.

Repeat battery procedure.

Still code 33 you may need to actually change out your MAF.

While your poking around in there check all vacuum lines to your plenum being careful on hard plastic lines (brittle) not to break them. Check the four middle torx bolts on your intake manifold for proper torque (40~45 lbs.)

 

thanks a lot

 

Did you get it fixed? I have the exact same problem with my 88 IROC. code 33. Which of the two relays on the firewall is the maf relay? also, is the fuel pump relay located in the same area? Thanks! Jim

 

dont forget to check the tps voltage.. if its out of specs you can get a code 33.

the fuel pump relay is the one in the middle of the maf relays.