Scotty, I have a 2009 Accord with V6 at 200k on clock. It is very well maintenance and taken care of but recently I use a can on CRC Intake and Turbo cleaner to de-carbon valves. I injected it well down stream of Mass sensor and throttle body via a central vacuum port central to intake. Ever since then it has a very small vibration at idle, both in park and in gear no change. After applying just, a little throttle it smooths out. Very aggravating to me. Could this have slightly fowled injectors or plugs. What else can it be? I have removed injectors twice in vehicles lifetime and had cleaned and calibrated, could it be just time for new ones? My scanner shows no codes, but I cannot read live data on it.
I just had timing belt and water pump changed and had motor mounts inspected at same time, still vibration is there
Is this an automatic and if so, Does the gear selected affect vibrations?
Try to do between D and N (these gearboxes do have a tendency to vibrate in P when the gearbox is going out.)
yes, it is an automatic but no matter what selection I'm in it vibrates very slightly. P, D, N and R all the same thing until there is slight throttle input. Transition has been services on regular bases around 50k to 60K, but this only began to vibration after using the CRC as previously stated.
inspect the spark plugs
next on my list
Pray it didn't damage the mass airflow sensor sometimes they can be damaged if cleaner gets on them and the system was live and power was not disconnected
I hope not too but where I injected it was well down stream of mass airflow sensor. However I pulled mass airflow sensor and cleaned it with CRC Mass Airflow cleaner. it seems slightly better.