Originally Posted by
grevster
Here is an update, I used a bottle of Gumout all in one cleaner in a full tank of 87 octane gasoline (sorry, i could not find any techron locally) and drove 2 hours continously on the highway around 110 - 120km/h. The next morning, when i started from cold, i still had the erratic idle but this time it was not bouncing between 1100 rpm - 750 rpm but it was bouncing around 900 - 750 rpm. So the amplitude of idling bounce reduced.
I gave another bottle of Gumout this time in half tank Shell 91 octane gasoline. It is still in the tank not finished yet but when i checked this morning, i didn't see any bouncing at all. Of course i need to check couple more morning cold starts to make sure but i guess it is getting much better and cleaner really helped. Thank you all!