Hi

I am in the process of swapping a MAF sensor and understand you should do an ecu reset. First question is:

I have got to the ECU in the passenger footwell but how do you reset it?

Also, does anyone know if you need a special tool to get the MAF sensor out? It looks like a star drive.

Fast responses much appreciated.

Thanks

 

Maf screws are a torx but with a little peg in the middle, I broke mine out cos I only had the torx,
Reset info here...... http://www.saxonfields.freeserve.co...._Impreza_Codes

 

You need a 'Security Star bit' to undo the Maf Sensor bolts, these are avalible from most motor stores and come in different sizes.

To reset you ECU you dont need to get at the ecu, disconnecting the battery for an hour will do a reset, there is a quicker way, this involves a set procedure, try searching under ecu reset in the scoobynet search option

 

Hollow torx screw

 

My 99 STi5 showed a MAF error when we plugged a digital readout into the ECU, it was idling very roughly (which is why we thought there was a problem).
Have just swapped the MAF now, done an ECU reset and seems a bit better, have to keep my eye on it for a while.....but it is 5 years old and thats not bad for a MAF sensor.

Good reference for ECU resets :
http://www.mrtrally.com.au/performance/howresetecu.htm

 

to undue the torx bolts use a pair of pliers on the side of the head.

I did, and now the bolts are completely donald ducked