uk300bake

hi all,

My 2001 WRX has now got an irregular idle, it goes up to about 1500rpm then drops and almost cuts out.
Is this vacuum hoses?
Front O2 Sensor?

Any other ideas chaps?

Cheers

Simon

scoobian

disconnect each in turn and see which has NO effect on engine ...that''ll be the culprit

99greenwagon

iTrader: (39)

i had a similar problem on my99 turbo,tried lots of things,it ended up being spark plugs which was a bit enoying but it solved the problem and car runs sweet now,if they are due then replace them for peace of mind if nothing else

uk300bake

Cheers mate, if I find nothing else then spark plugs it is.

dynamix

iTrader: (3)

Sounds like front O2 sensor.

uk300bake

just looked at it, the wires look okay ish! where they come out of the sensor they look at little frayed, can these be repaired?

chrisUK300

iTrader: (10)

Depends how close to the sensor the damage is, if you need a new sensor I have one for sale at a very good price

Stealth

iTrader: (4)

Hunting is normally a sign that the MAF sensor is playing up....... Start the engine and let it hunt then unplug the MAF, the car "Should" stall if the MAF is fine

chrisdicko

iTrader: (21)

Not wanting to hijack...but is this the MAF on my car:

chrisUK300

iTrader: (10)

Yes thats your MAF

chrisdicko

iTrader: (21)

Cool, thanks mate. Will give it a go as well, as mine seems to be running a bit rough really, and idles weird occasionally.

Sem

Sometimes aftermarkets DV's can cause this problem too?? Just a thought!!

chrisdicko

iTrader: (21)

Hi Sem,
Yeah, I do think that's my problem to be honest! But will eliminate the MAF out of the equation.

MK2VTR8VALVE

so if the car doesnt stall when you unplug the maf but just idles funny, your maf is done? Is this correct?

What are the consequences of running the car like this?
Cheers..

uk300bake

Im just haveing time issues at the minute and havent had time to play, if my sensor is cream crakered how much for yours Chris?

ReggieMY99

Consequences could be a melted piston

if the car doesnt stall the ecu has learned to cope with the missing or wrong input

if in any doubt replace the maf, afterall its cheaper then a rebuild..

MK2VTR8VALVE

cheers for that...is there a possibilty it could cause bottom end failure as well?

chrisUK300

iTrader: (10)

Emailed you fella, im open to offers on it

joz8968

iTrader: (13)

Yes.

If the MAF is knackered and is giving spurious readings it coud be giving a 'wrong' low rpm voltage at high rpm, fooling the ECU to dangerously underfuel. This could lead to terminal det, causing piston failure... or these extremely high-pressure det 'spikes' could hammer a big-end bearing shell into submission...