ian10

anyone know what be the cause of my car overfueling on tickover
and when it is cold,on start up you can smell the fuel.
It's a newage sti 8

Brun

Maf sensor can cause overfuelling at tickover

jim litten

A failing lambda sensor will cause it to overfuel at idle as it'll read lean and so the ecu will add fuel to compensate, same in cruise when it's still running closed loop fuelling.

ian10

Both lambda and maf have been changed ,lambda under warrenty and i got the maf changed and had a ecu reset

anymore ideas please

i've tried a different fuel reg as well !

prana

if it's just warming up, this is normal, car runs rich and the cat isnt heated up yet, it'll smell pretty 'fuelly' unless it's excessive.

What's 'tickover' mean ? does it mean idling ?

ian10

ye idling,
feels like its om 3 cylinders, then when warm it fine

Slowboy Racing

Possibly temperature sender if its faulty the car can run rich if it gets an incorrect reading once its warm it will be fine.

ian10

is that the water temperature sensor that sits in the manifold under the altanator ?
If so i've changed that as well

davedipster

The 03sti does run very rich when cold, don't worry it's very normal.

chris25uk

isnt there 2 temp senders tho?? i was told by subaru there is one for the gauge and one for the ecu, did you change the ecu one?? might be talking out me **** just saying what subaru have told me as i have a problem with temp sender

Turbotits

iTrader: (2)

Is it a neat fuel smell in the car? or fuel from the exhaust?

Have you had a fuel pump changed recently or ppp fitted?