Occasionally my 2000 subaru outback, 220,000miles, will rev in pulse like patterns when I am stopped at a stop light, the RPM needle does not move when this happens. If I put the car in neutral it stops doing this and sounds smooth (car is automatic). I noticed when I was freeway driving it did a small jerk/skipped a beat a couple times over an hour period. I have taken it to my mechanic a few times. It always behaves when I go to him. No check engine codes. We changed the transmission fluid. My last fill up I used premium w techron. There is no pattern of when the rev happens, hot or cold day, just turned on or been running for a while. I need to figure this out so I dont feel like I am going to break down while driving.
That's some mileage you've got on the car. It has obviously been well maintained?
Car engines do surge, Deb. Next time you stand next to a bus or truck just listen to the sound of the engine .. an occasional surge and change in the engine note.
It doesn't sound as if you have anything to worry about
SOURCE: 1994 subaru impreza wrx engine light on
Many automotive computers have a RPM limiting feature that tries to prevent engine damage if something is amiss.
This should allow you to drive to repair point but keeps the engine from doing a lot of work.
You need to have your computer scanned to determine what the stored error codes are.
You can have this done free at any auto parts chain.
SOURCE: 2001 outback automatic stall.
When you changed the ****** fluid was it brown? If so I regret to inform you, you may need a new transmission. The brown color is due to the clutches in the trans, wearing down over time. Does it shift hard when you drive it? If it does that is another sign the trans has gone out the window.
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