Having a bad running engine and kangarooing subaru when driving the first miles on a cold engine ???
Clean the AFR sensor with carburettor spray, to blow away all the dirt and oil ( from KN filters !!!! ) The AFR unit gets hot while working so all the substances that are flowing trough tha air are burnt on the surface. I clean mine every 1000 miles and I must say every time its done my scooby drive much easier and without jumping and sneezing trough traffic !!!!

 

Are you sure it's the AFR (Lambda sensor your cleaning).... the MAF sensor would make more sense if your refering to k+n filters.

Tony.

 

sorry bout that , its the MAF sensor of course... But I have recently also changed the lamba sensor because it was broken : it always gave 0.7 mV in stead of going up and down from 0 to 0.9

 

if it works like you say then you are a life saver. i will try anything to stop this annoying problem.

 

wally, i will try that asap!!

mine has been running like sh*t for ages, just as you say for the first few miles, splutters and jerks a lot...

ian

 

UK legacy T watch out , before you re install let it dry or clean with comp. air, do NOT touch the little iron parts on the sensor and dont forget to plug the connector back or your engine light will go on as soon as you start

 

Anyone know of a page that that shows you where MAF sensor is and how you get it out/clean it etc? Want to do it but know naff all about it

Cheers

Ab

 

take the top off the airbox (where the air filter is).
start the car.
hold it steady about 3000 revs,
and spray into the airbox opening (two or three sprays should do it).
it will suck it in and magically clean the MAF sensor

 

What product do you use???

Thanks

 

i wouldn't use a carbureator cleaner on that they are rather corrosive...i'd rec you use an Electronic Cleaner as it leaves no residue and is much less harmful to the sensor.

jeremy

 

Wally, what MAF sensor do you have on yr scoob as they changed MY99 (STI 5) onwards top a sh1te unit which is very sensetive.

Gez

 

Unipart brake cleaner (£4.99 from Halfords) leaves no residue and works well