What causes RPM to drop at idle?
This is a common sign of a dirty or failing idle air control valve. This is all controlled by the idle air control valve. When the engine RPM drops below the normal range of 750-800 RPM (for most cars), this often times will cause the engine to stall indicating a dirty or faulty idle air control valve.
What would cause my rpms to drop?
The engine RPM drop when changing gears is often caused by a failed throttle position sensor (TPS). When in use, the cone of the TPS accumulates soot that prevents the correct rod movement. If a TPS works abnormally, the air-fuel mixture will not meet the requirements.
What to do about hesitation in a Subaru Outback?
I have a 2007 Outback that had the same symptoms. Taking the MAF (Mass Air Flow) Sensor out and spraying some electronic sensor cleaner on it removed the hesitation. There are just two screws that hold it in to the intake, so it is a quick operation.
Why does my Subaru have a low power response?
After explaining problem to mech he said it was either the fuel pressure regulator or the fuel filter, I took the opportunity to replace spark plugs, air filter, oil, oil filter, and a very dirty fuel filter (which I believe was the culprit in my case), and of course a very expensive O2 sensor. Car drives like new again…response is super!
Why did my Subaru Outback hesitate to change the spark plug?
My hesitation was due to my plug wire on #3 breaking apart after the last spark plug change (I pulled on the proper location of the wires to take the wires off). I changed them in the parking lot of the local Subaru dealership (when I was out of town!).
Why does my Subaru hesitate when I accelerate?
Subaru 2004 2l auto tip tronic. It seems to hesitate or have slow or lack of power when you accelerate slowly Just resolved a similar problem on ’03 Forester 2.0 turbo. Car would not respond for 2 to 3 seconds when the accelerator pedal is pushed. Also, when it finally kicked in it lacked power.