Is there a way to check if the MAF is Fubar'd?
 

Is there a way to check the MAF on my V3 Sti?

Cars been sat for a few months in the garage and I'm getting the check engine light on the dash and the error code 23 (two long, three short). I know this usually means the MAF is kaput but could it be anything else? Don't understand why it would fail sat in a clean dry garage?

If I can check it out with a multimeter somehow just to be certain it is knackered.

Thanks

Hi mate, going from experience, before shelling out I would perform a thorough check of all inlet pipe work, this may involve removing the inlet manifold to check the turbo inlet pipe. When I finally checked mine properly I found a big tear where it joins the turbo that couldn't be found previously.

Yeah. check with multimeter. At idle, IIRC, the output voltage should be between circa 0 and 1V, and at WOT then about 5V.

If you get erroneous readings, then to confirm, disconnect the MAF electrical connector. If the engine's idle doesn't drop and/or stall (i.e. nothing changes), then no doubt a knackered MAF.

Thanks guys, I'll check these out tomorrow.

Sorted now, cleaned MAF and reset ECU and let the engine run for some time. It hasn't been run since summer so either dusty MAF or a connection needing cleaned.

Awesome stuff :thumb: :)