Shaky engine feeling on cold start

[Newbie GT]

Anyone experience this also ?

[<GB>]

have you replaced plugs? that would be a start? has the engine light come on? what are your current mods and car?

[Newbie GT]

Hi mate no mods was told by Subaru no need to do plugs until 100k service
No engine light

[Kekotic]

Have you recently filled up with fuel?

[<GB>]

How many km now?

[Newbie GT]

89k

This gas been an issue for a long time do you guys get this too on a cold engine ?

It seems like maybe engine shake you can feel car a bit shaky too

[jacks-GTB]

air pump for cold start.....it's normal

[Newbie GT]

air pump for cold start.....it's normal

Causing shaky type effect jack ?

[jacks-GTB]

Yeah it does...in the steering wheel actually everything for like 30sec

My car doesn't anymore because I don't have my air pump anymore

[Newbie GT]

Yeah it does...in the steering wheel actually everything for like 30sec

My car doesn't anymore because I don't have my air pump anymore

Okay sounds about right jack but I can actually feel car shaky

[Rome_BRZ]

Yeah it does...in the steering wheel actually everything for like 30sec

My car doesn't anymore because I don't have my air pump anymore

+1 get rid of the air pump, 5kg of crap you don't need

[bigBADbenny]

Did you read my posts about the AVCS issue?
Easy enough to log it and spot if its the issue.
Or once warm try holding 1500rpm.
If revs drop and the car starts rocking...
We're working on the various fixes...
The thread is going to be/already epic, but once resolved the conclusion will be moved to the OP...

[<GB>]

few ideas to work on now huh.

[Shaheenis]

Mine has this idle wobble which shits me. Worse when cold but is there most of the time when warm too. Most noticeable on idle can't really tell under power. If you ever so slightly blip the throttle on idle it accentuates the wobble. Mine has done 100k and plugs aren't due to be swapped until 125k (for the 2.5ltr). Car has full service history with injector cleaner between services etc.. Given it does this when warm also, does this sound like AVCS filters? I would be surprised if it is as the previous owner had both solenoids replaced including filters (~$800 worth) only 5000ks ago and runs full synthetic oil.

Description from mechanic was 'Customer advises that at low speed there is a lag in acceleration and tends to stall. Found trouble codes relating to the Oil Supply Valve Solenoid. The oil had become quite thick causing the solenoid to stick in position therefore making the car run roughly. Cleaned out the left and right solenoids and refitted. Flushed the engine oil but car still running rough. Replaced both the solenoids and test drove, all OK. Cleared code out of ECU memory.'

[bigBADbenny]

Avcs cam gears may need replacement pending logging and or experimentation with different viscosity/detergent pack oils...
Summary here: viewtopic.php?p=290104#p290104