Hi everyone,
I recently bought a '99 Legacy and it has a really bad acceleration problem.
Symptoms are:
*Barely any acceleration from a stop, I will have to push the gas pedal down really far and when I do that the car just jerks forward as if its choking. There is a major delay in acceleration and when the engine finally responds i get very little power.
*The car accelerates completely fine in highway driving and seems to be only an in town driving problem (at lower speeds).
*The problem is intermittent but frequent.
*Seems to get SLIGHTLY better when the car has been driven for 5-10 minutes, but still a noticeable problem.
*NO check engine light.
*No unusual sounds coming from the engine or trans.
*Car idles fine and engine runs smooth.
I just replaced the PCV as part of general maintenance and seafoamed through the PCV and gas tank. New air filter as well.
If you go to this link: http://www.consumerguide.com/subaru/leg ... 1995-1999/ and scroll down you'll see that a common problem is:
Poor transmission shift: Hesitation or poor acceleration may be due to the powertrain-control module (PCM) misinterpreting normal
engine vibrations as knock, and retarding the ignition timing requiring a replacement PCM. (1999)
Has anyone had this problem and if so, did replacing this fix it?
I am not that mechanically inclined and would like to have a good idea of what it is before I take it to Subaru and have them replace unnecessary things.
Any help is GREATLY appreciated!! Thanks