Question about 1999 Subaru Legacy

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1999 legacy outback no power going up hill,new knock sensor

Check engine light on and still no power going up hill

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  • nancy kern Mar 12, 2009

    thank you for the help.

  • nancy kern Mar 12, 2009

    thank you you are wonderful to help like this.

  • DanyielAI May 11, 2010

    You probably need a full tune up. And you need to do a systems diagnostic to see what trouble codes the commputer is reading. I wouldn't drive it too much till you do this.You may be doing a significant amount of harm to your vehicle.

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Check your tail pipe for color. If insides are black you are running rich and it all may boil down to an oxygen sensor or an EGR valve. EGR valves are the most common causes for the 'check engine' light to come on. Your trouble codes will tell you what it is. Some auto stores will check it for free or you can buy an inexpensive checker.

Posted on Mar 12, 2009

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1 Answer

Where do I find the knock sensor on a 1999 Subaru Legacy Outback


it is on the top of the motor just under the intake manifold. it will look like a wire with a rubber washer around a 14mm bolt.

Sep 23, 2014 | 1999 Subaru Legacy

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Hi, I had the knock sensor changed in my 1997 Legacy Outback by an independant shop. I drove it the one mile back to our house and was amazed at how quiet it was to not have the ticking sound! But, now...


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1998 legacy outback. engine light comes on & goes off sporadically, when on, it hesitates at takeoff & runs rough at low speed.


Knock sensor has gone bad most likely. I had the same problem with the same car and replaced the knock sensor. Fixed the problem. Very common with Subarus. It's an inexpensive part but it requires patience and small surgeon's hands to get to it and replace it. Lots of how-to articles on line.

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Try better gas for a tank and make sure it's the transmission is downshifting when you go up the hill. After that the valves may need adjusted or replaced.

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1997 subaru legacy outback knock sensor location


Hiya,

Here you go:

2.5L Engine To Remove:
  1. Disconnect the battery ground cable.
  2. Remove the air cleaner housing.
  3. Vehicles with 5-spd transmission: Remove the clutch slave cylinder and set aside.
  4. Disconnect the knock sensor wire harness retainer from the coolant hose.
  5. Disconnect the knock sensor (KS) wire connector.
  6. Remove the mounting bolt and knock sensor from the engine block.
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Hope this helps...

Cheers,

Nov 12, 2009 | 1997 Subaru Outback

1 Answer

Outback wagon no power going up hills.


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1997 Subaru Legacy GT 2.5L


Check the knock sensor.

The light comes on when you climb a hill, accelerate quickly or do anything that advances the timing a lot and the knock sensor doesn't hear the knocks (pinging). The engine timing is not retarded, so you get a misfire.

The computer turns off the CEL if it sees the car start and run with no misfire of this nature 4 times in a row.

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The CEL will go out on its own if you have 4 starts with no misfires. If the knock sensor is out, rapid accelleration or steep hill climbing will make the light come back on as the timing advances and the sensor does not ****** the timing for you, so the knocking becomes a misfire.

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