99greenwagon

iTrader: (39)

it would make sense as my car has a few miles on it.more likely than coil packs?

jenk9988

99greenwagon - - Had the plugs changed on the service recently with Subaru and they didnt make a difference! My next guess was the coil packs/leads but would have thought they would have noticed if they were dodgy?? If you do do yours on the weekend can you please post if it makes a difference?
Cheers
Jenks

prodriva

Do you know your way round a multi-meter? If so you could test the coil packs and see if they are ok.

jenk9988

How do you go about that then?

99greenwagon

iTrader: (39)

multi metre no,wouldnt have a clue,im just fairly good with spanners. and yeah ill be doing plugs this weekend and will post reults,as for the leads i dont think they have ever been replaced,car is on 136k.could well be the problem,but ht leads are not a routine maintainence on service are they?

99greenwagon

iTrader: (39)

i always thought that dodgy plugs and leads result in really bad firing problems etc.

chris wrx 95

iTrader: (1)

I had all the problems you guys have mentioned and replaced every thing you have suggested even the coil packs and plugs. It made no difference at all.
After a day in the garage it turned out to be a faulty water temp sensor. I had replaced this but with one from a Scooby down the scrap yard. Bad idea.
Its completely fine now and only cost £30 on ebay for a new one. You would be surprised what a faulty water temp sensor will make you car run like. Id get one if I was you and at £30 its worth trying this before you try coil packs, plugs ect. But I bet ya this solves the problem
Hope it helps mate as I no how your feeling. Took me over a month to sort mine.

99greenwagon

iTrader: (39)

thanks for that mate,where under the bonnet is that sensor located?

STI_Baly

iTrader: (23)

Sorry to hear this mate....but maybe this thread can help>>>>>>

https://www.scoobynet.com/general-te...tml?showfull=1

chris wrx 95

iTrader: (1)

Its under the inlet manifold on the top left (closest to the bulk head). You might have to take the pipe off the turbo to get at it. Its Screwed in horizontally. You shouldn’t be able to miss it. Put a post up to see if anyone has some pictures of it. Someone might as its quite a common problem

STI_Baly

iTrader: (23)

Find the water crossover pipe in between the inlet manifold and block, make sure your standing looking at side of the engine on drivers side and it will be hidden under all the sud as in this pic.

Good Luck.

Also a worthy mention do your rad fans come on? if they constandtly stay on or do not go off at all when the temp comes down then this sensor is definitely faulty.

STI_Baly

iTrader: (23)

It's the one with brown plug and will have the large clip type connector.

99greenwagon

iTrader: (39)

thanks for the pic,would it be a 2 pin or 3 pin sensor that i need for my99? and what do u mean about the fan,cause i did notice that when i started my car from cold the fan was on after about 10 mins,dosent normally do that.it couldnt have been hot! temp guage was reading normal!

chris wrx 95

iTrader: (1)

i would say thats almost def the water temp sensors fooked

STI_Baly

iTrader: (23)

That's not normal but then again these engines due tend to run very hot. Hmm got me thinking now.....and i would say 75% its sensor fault.

This is no ordinary sensor unlike old cars - this sensor sends signals to the ECU and this will then control things from there so an example would be a dodgy signal from this sensor is causing your motor to cough and splutter at low RPM....remember the ECU controls the rad fans too so if this coolant sensor is sending the wrong signal then the fans will also start to act in strange ways.

V5's are 3 pin but it will only take you 5 mins to double check and it's advisable...

Heres a V5 sensor anyway>>>>





Hope that helps

Baly

99greenwagon

iTrader: (39)

great! so is it a 2 0r 3 pin that im after (my99)?

STI_Baly

iTrader: (23)

Guy, thats a version 5 1999 sensor above and it's a 3 pin so yes if yours is a v5 1999 then yes it's a 3 pin.. ..but surely you could just pull the plug out of your existing one and double check couldn't you?

As it wouldn't be the first time somebody had doctored a loom.. ..and considering your finances right now a double check won't hurt.

Baly

99greenwagon

iTrader: (39)

yeah thats brilliant mate cheers.defo 99 version 5,its got the crystal lights{face lift}bumper etc. it may have been a coinsidence with the fan,it may have been a bit longer than 10 mins but car ran ok ish after cleaning icv,when i pulled up on my drive idle was settled ok,i blipped the throttle and then it dropped to nearly 0 and wavered up and down between 0 and 1,if u then switch car off and back on its then ok,again until u get up 2 temp then it starts to play up.what u think now?

STI_Baly

iTrader: (23)

I've had this problem before and it relates to coolant level/sensor. (i'm 70% sure yours is the same issue)

Do ensure you haven't got an air lock in the water system though and ensure coolant level is ok as low coolant also has the same affect.

Baly


EDIT>>> I'm assuming the ICV and hoses are all ok and have been checked?

99greenwagon

iTrader: (39)

coolant level was a bit low the other day so i topped up with about half a pint.that wouldnt give an air lock surely?idle is the very main problem but general driving is ok,a little hesitant under alot of load in the higher gears.it almost stalls when it does this.definetely dosent seem like misfire etc.when i reset ecu the other day the revs went up to 3k and back down about 3 times then settled,this was after cleaning icv,but after that idle fault is still there.when your 70% turns into 99% ill be happy cheers for this sti baly any more info on symptoms would be great.

vag.gary

sounds like you have a faulty idle control valve, try unpluging it and starting the car,

99greenwagon

iTrader: (39)

ok so how would i tell its faulty or not by unplugging it and starting car?

Coolasice

have u tried the lambra sensor

wrx t

hi there can anybody help me out here i bought a subaru for mybrother the other day and just noticed tht one of the lights on the bottom of the clocks in the middle has a piece of black tape over it does anybody no if it is a abs light or oil light or anything else it is a bug eye model 2001 didnt get the manual or anything with it so cant check my self thanks

REDBULL2

mine does the same changed the plugs and it got better, iv also just changed the maf and so far so good but havent had chance to really try it
but iv put it down to it need another re-map coz of the mods iv put on the car

have u moded your car and had it mapped

hodgy0_2

the problem you describe is exactly the same that occurs on MK2/3 golfs GTI's

at standstill will idle ok even when throttle blipped -- but when slowing down in traffic the revs drop and drop and drop -- they may come back to idle but often just die

this is really common and always something called the ISV idle stabilization Valve -- not sure if scoobies have them -- from above post it maybe called the ICV --

garryrb5

Just for info on the v5/v6 imprezas the coolant temp sensor is at the front just underneath the alternator and its 3 pin

STI_Baly

iTrader: (23)

I think you'll find thats the crank sensor.

99greenwagon

iTrader: (39)

wrx t,nice thread hijack,ever thought of posting your own thread? anyway,what im going to do is try a mates icv and see if it is the problem,im going to change plugs and if still no joy,then its got to be the water temp sensor(hopefully).im hoping that it will be cured by then or if not atleast ill know what it is. am i correct in thinking a new my99 icv is around £200??? anyone no where i might get a new one any cheaper?

99greenwagon

iTrader: (39)

so is the coolant temp sensor located at headlight side of engine or dash side?