Slightly erratic idle

[Harryburgundy]

Did you fit the bulbs Gambit?

[Harryburgundy]

Okay...finally got around to checking for ECU codes. Nothing. Steady long flashes

[Harryburgundy]

Idle problem not getting any better...someone has suggested that the IACV could be gummed up and on YouTube there is a vid of someone cleaning it using Subaru Upper Engine Cleaner. 

Does anyone have any experience of this?

Carl

[Harryburgundy]

Not much of an update. I have 'cleaned' the engine using Forte engine cleaner and Forte injector cleaner. The result? Much improved acceleration and general smoothness but the idle prob still present. Waiting for some MAF cleaner to arrive then, with the Forte intake cleaner I already have, will give all the inlet stuff a good clean.

[Gambit]

I know rough idles are a pain to track down I've done it twice myself, once as I said Maf and 2nd was a split hose on another car. Took me ages finding the hose with the split :( 

[Harryburgundy]

Aye...pain in the butt. Cleaning air intake and maf today. Smoke me a kipper

[stants]

Where did you purchase the cleaners from good sir ?

[Harryburgundy]

Both the Forte and CRC stuff from g'ole eBay. Have cleaned both now (throttle body and butterfly valve were a bit dirty) and will test drive later. Wanted to clean tcv too but think I need a new seal bag before dismantling. Could be wrong, as usual.

[Harryburgundy]

Meh...definate improvement in acceleration/pick-up but bl**ding idle still being silly.

Mmm...plugs, leads and coil next. !Removed!

[Gambit]

Did you just clean the MAF I know that doesn't always work. Well never worked for me on 2 separate mafs, wasn't until I bought a third one it sorted it :( 

 

But if the plugs need or are due to be changed that would be my next stop before anything :) 

[Harryburgundy]

Hi Gambit

Yup, just cleaned the MAF and throttle body. As you say, plugs etc next although in my little head I don't know why that would be it (and several people have told me it could be that). I thought bad plugs or shorting coil would result in rough, spluttering idle

[Harryburgundy]

Oh...to explain. My idle isn't rough or pulsing/hunting...it just, on occasion, runs at 1200 or 1500 or 2000! Like I had my foot on the pedal.

[Gambit]

So it would increase the revs not drop/stall ?

[Harryburgundy]

That's correct. Normally it will sit steady at circa 600 but occasionally it doesn't drop down and stays at 1200-1400, sometimes more

[Gambit]

Oh right so could have been looking in the wrong places still could be a few things :( 

 

Throttle Position Sensor 

Lambda Sensor (< Would be my main guess )

[Harryburgundy]

http://www.lambdapower.co.uk/diagnosis/diagnostic_index.asp#q5 :-(

[Harryburgundy]

Is this worth buying?http://www.emanualonline.com/Cars/Subaru/Impreza/Subaru-Impreza-Workshop-Manual-(93_96).html?gclid=Cj0KEQjwnZShBRDfxqzr55rcyMEBEiQA1iRNPzXLZ8D3yDHsVlw61w2WPWlzWeSTaO5XtcfXXQvWSe0aAor08P8HAQ

[Gambit]

No not yet anyway I might have a PDF workshop manual for you car and it will be free :D 

[Harryburgundy]

Oooo...that's one of my favourite words ;-)

[Gambit]

try this think it should work 

https://drive.google.com/file/d/0B8TFZlCx15kTbmNPY1NDRUZRb2s/edit?usp=sharing

[Harryburgundy]

Not working in my phone, will try at work later. Thanks :-)

[Gambit]

I clicked it gives me an option to download it but it's my link let me know :) will try do it again  if it doesn't work :D 

[Harryburgundy]

Meh...it downloads but the I can't open the file

[Harryburgundy]

May be you can email it to me?

[Gambit]

I will have a look might need winrar to unpack it