having problems with my sti type-r v5 1999, slight hesitation on light throttle and sometimes revs upto 1500-2000 on tickover, plugged diagnostic cables under dash fault code 23 showing which is maf sensor purchased brand new sensor from dealer and reset light after a driving over 6 miles still having problems and fault still showing after pluging leads together, any ideas please can anything else cause this fault thanks.

 

check the wiring for the maf, i had water damage at the conector where i hadnt fitted my vent covers for the winter. the plug terminals were green

 

When you did the full ECU reset procedure did you get the 'all clear' code??

 

yeah - i had issues with my MAF because of water/damp ingress(was actually showing an error 22 code which was misleading!) ended up i made a shield for MAF & wiring out of plasitc bottle just - worked a treat

 

Did you reset the ecu after swapping maf sensor?

 

i will check the plug this weekend for water but i have reset ecu several times and it still comes up with fault code 23, just check scoobypedia and when ive been reseting ecu i just plug both black and green plugs together and drive for a few second until check light flashers then turn engine off and it seem to clear, noticed this is a different proceedure to the one on scoobypedia is that why it keeps showing this fault code ?

 

faulty maff normally revs from= nearly cut out to only about 1200 from experience on idle have you tried idle when maff is unplugged ??

also try diagnostic with maff unplugged

 

iv always been told on the 99-00 years not to run the car with the maf unplugged.

 

When the CEL flashes it will either show a 'all clear' code or a 'fault code'. Which does yous show??

Give the procedure on Scoobypedia a go and count the flashes at the end.

 

It's showing all clear cheers

 

Cool. See how you go.

 

Car Started playing up again today, car revs up to 1500 on tickover, checked diaog plugs and code 23 again (maf) is there any chance the idle control valve can cause the maf fault code to keep showing ?????

 

Think i'd be going back to the dealers at this point mate, let them see the brand new MAF they sold you.

If it is a brand new unit then it is not fit for purpose and should be replaced.