hi people,my 99 idle problem,once up to temperature the revs drop to nearly zero on idle,then it recovers and wavers about under 1000k,its had new maf,knock sensor,checked for intercooler pipework leaks,ive cleaned the idle control valve and its still bloody doing it car is my99 uk turbo wagon.am i missing something here? really starting to enoy me now ive even done the maf test to see if the new one i have is f**ked and car stalled so new maf is fine!pls help,any suggestions?cause im running out of ideas here!

 

oh yeah,forgot to say,i have no ecu fault codes and i have reset ecu aswell!

 

any ideas anyone?????????????????????????????

 

What about the O2 sensor and the water temp sensor

 

surely if either of them were faulty,wouldnt it have registered a fault code on ecu?

 

Not always, best to take it to somebody who can read the sensors realtime

 

would plugs not cause this symptom?

 

i want to try and eliminate anything silly as im low on cash at mo,any other ideas?

 

Hey buddy i had a very simaler thing not as bad but my revs would drop and she would cut out when boosting up i changed everything still done it my mate told me to put some new core packs in her which i did and she runs fine hope this helps,

 

u mean coil packs?

 

yes!!!!! same horse different jockey

 

so it could be any item under the bonnet then? its a job to know what to replace and what not to as its all trial and error,but a very costly one! thanks for the info mate,hopefully ill get some more ideas on here. were the coil packs expensive?

 

Well i spent about £300 before i found out it was coil packs and a half decent set cost me £80 so not to much,

 

Mine had similar... Turned out to be the O2 sensor. Problem is that other things going wrong will cause an odd fuel/air mixture which need to be excluded before settling on the O2 sensor. In other words it needs to be on a monitor in a garage.

You can unplug the O2 sensor but it'll cause a CEL. If the car drives better, however, you can probably live with it for a little while.

One symptom mine had was it'd be fine after a battery off or reset but eventually learn to be crap again (matter of 10s of miles, no more).

J.

 

£80 i aint got at the moment,just paid out for sensors etc.so frustrated!

 

99greenwagon, I have a 99 uk turbo also and thats exactly the same problem as what im having at the moment!!
Was going to post myself but you have beat me to it.
I have tried almost the same as you, even bought some new hoses including the intercooler pipe and also gone through the expense of a full big service by Subaru (around £450)
But the problem is just as bad!!!

Jenks

 

aaaaaaaaaaaaaaaggggggggggggggggggghhhhhhhhhhhhhh:m ad:

 

does anyone think i would be better off putting a 9inch grinder into it?

 

Does your exhaust seem to Pop/backfire when changing gear or putting your foor on the clutch when slowing down? As mine does quite a lot and seems to be getting worse!!

 

yep

 

no it aint really doing that,it generally runs well,seems a bit hesitant nown again,its just this f**kin idle crap at the moment!im starting to lose my patience with it,as its costing me cash i aint got and its probably something really stupid!

 

Were you answering my question? If so is this normal?
Cheers
Jenks

 

is all your gauges working ok temp fuel etc. The reason i ask scoobies and a lot of other cars are very sensitive to earths make sure that all earth points are good and clean. Gearbox, engine battery etc

 

Snap!!
Hopefully someone can give an answer to this!! Just of of curiousity has yours had the wr prodrive package? As I am wondering if this could have anything to do with it (doubt it though cos they know theyre s**t!!)

 

all guages fine and no prodrive pack! ive got ecutek 3 remap.

 

It sucks when your cars not running right and believe me I've learn't my lesson when it comes to tracing faults. Leave it to someone who knows about the marque of car. An hour of a garages time fault finding is money better spent than chucking money at random parts untill by luck and luck only you MAY find the casue of the problem.

 

i know what u mean but if there is no faults and car has been 100% since ive owned it,then im thinking it can only be something minor,it couldnt have come at a worse time cause im skinto! hoping to just find something if u catch my drift before i have to pay out for labour to fault find!! would spark plugs affect idle?

 

Yep, and old perishing HT leads.

 

hummmm cause my leads do look a bit old,but would that not be really noticable under load?my plugs are due,gonna do them this weekend.

 

Depends how badly perished they are. When it comes to hard to find faults it could be anything really. I'd put a virtual pint on the HT leads/spark plugs being the cause of the problem.