I think i know what u mean, i have the same car and possibly the same thing happening... its like there is lag in the drivetrain or something, but it only happens sometimes usually lower revs ie crusing at 60 in 4th... its not that jerky/noticable as i have learned to drive aroound it most of the time.

if you figure it out let me know... coz it is one of those things that is annoying when you know its there!

cheers
dan.

Yeah I have learned to drive around it too. I just thought there might be some 'slack' so to speak in the driveline or something???
Any more ideas guys??

Jarrad.

ha ha ha, I have exactly the same problem. Seems to happen when crawling in traffic a lot.

I have learn to deal with it cause i have seen a few people with the same thing happening.

Let me know how the extractors went and if they fixed the issue

haha got the same problem here

what kind of extractors did you get?

can you link us to them?

Clean out the intake manifold, throttle body, IACV etc etc with SA459 (upper cylinder cleaner) then reset the ECU.

Hi There,If you contact your dealer you can ask them for the price of a ADDA kit and fit it yourself or you can contact them to get a FLASHWRITE (reprogram through select monitor) which will also cure this.The reason you are feeling this is the stepper motor graduations are too big hence the sensation,the kit will reduce this and wont be as harsh.Hope this helps.Cheers Eddie

Hi Jarrad,
              Basically it is a ECU reflash from the factory.I don`t know how much the dealer will charge as alot of them don`t know it is available to them.I found it by accident when i was mucking around with the scan tool.I tried it on my car and it made it better.The ADDA kit is better again but i think it is expensive @$300 for the part only.Subaru were doing them under warranty or customers that were complaining but not everyone did.If you are the original owner you might have a shot.If  you need anymore info just ask.Cheers Eddie

It was a kit that Subaru developed for the GEN3,it stands for accel-decel,decel accel (acceleration deceleration).Like i said not everyone complained of this issue with their cars so that is why not all dealers know of it.It comprises of some hose,fittings and a air slide from a Bosch K JETRONIC mechanical injection system and the appropriate wiring.It basically helps the stepper motors operation.Hope this helps.

Cheers Eddie

If the dealer is too expensive you can ring your local EFI parts supplier and get a price on a air slide to suit a 1985 240 Volvo (it can be any euro car of that era that has K jetronic) and you might be able to make the kit yourself if i can find the instructions.Let me know either way.

Cheers Eddie

My Gen 3 RX had the same problem and I took it back to the dealer twice and both times they didn't fix it. They thought it was a problem with the drive shaft and the rear diff. Great work Subaru Doncaster  :***: they never fixed it and I gave up and dealt with it. I agree it was embarrassing at times coz ppl thought I couldn't drive lol. Ah well some cokhead relieved me of that car anyway and ***ed it more than it was, I bet the jerkiness would've been the least of my problems if the insurance company decided to repair!

Ok...it has not gotten worse and is doing it constantly...and the problem is that it is only firing on 3 cylinders. Crap. So really hoping it's nothing too serious...but rather just a plug or lead...otherwise I don't want to know what I'm up for.

Why can't I have kept my old Impreza...I had it since new, I knew it was always serviced and ran without any problems...but no, some silly woman had to pull out in front of me and write it off. Grr!!

Has anyone had any luck fixing this problem? my my03 rx manual has the same problem, I can drive around it cause I know its there but it is really starting to **** me, It would be so much nicer to drive if the issue wasnt there