Hi, sorry this is a long story may pay to get some pop corn
I have looked over countless forums for the last 6 months trying to fix or at least get a clue as to why my 2004 BL Auto legacy GT is running with a rough idle and shaky acceleration some of the time.
I took the car into a workshop to get them to fix the issue who proceeded to check the following
Spark plugs (replaced)
coil packs all check on a tester and were good
compression was fine
injectors seemed fine
Maf sensor fine (also tried cleaning it which done nothing)
other stuff too which i cant think of at the moment but will update this evening.
Basically he was unable to find what was wrong so he took it to Subaru to plug into their computer which reported that it was fine and they couldn't even feel the shaking.
The car shakes from gently to mildly when in neutral stationary, almost never in drive with my foot on the brake but can feel it miss under acceleration and sometimes cruising speed.
The car is awesome on petrol and uses little to no oil (not perceivable between oil changes).
Does it both cold and warm and varies intensity between them both.
I have purchased a vag com cable and plugged it in and done some logging with romraider and found the only thing that really stood out was that the Ignition timing when it was shaking was varying from I think around 0 to 40 but stable when not shaking. I will post a picture of the graph tonight when i get home. The log was taken at idle with moderate missing.
So finally the question, what sensors should i log to try and narrow this down as i have a suspicion that it is just a random sensor that is throwing the timing off which is making it shake.
I thought it may be the rear 02 sensor but have no idea what values to look for as it is always between 0 and 1 volt.
Any and all help will be greatly appreciated as I truly have almost had enough with the car
Thanks
Cameron