2003 Outback engine pinging

Discussion in 'Subaru Outback' started by Grumpy, Jun 19, 2006.

  1. Grumpy

    Grumpy Guest

    Hello all---

    Anyone else out there have some minor engine pinging in a 2003 Outback
    w/stock engine? I bought this car used with 63K miles on it. I've tried
    hi octane fuel, no change. Only happens on uphill grades when the engine
    is working harder. Happy with 27 mpg around town......

    Any suggestions/comments appreciated.

    Grumpy, Jun 19, 2006
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  2. Grumpy

    Edward Hayes Guest

    A slight pinging on light acceleration is normal and my Forester has
    done it for the last 106,000 miles. If it quits then something is
    wrong. All that's happening is the ECM is adjusting the timing for
    maximum engine efficiency. We are talking about a slight light pinging
    Edward Hayes, Jun 19, 2006
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  3. Grumpy

    Grumpy Guest

    HI Ed--

    Yeh, it's a pinging, not engine knock. The Subaru dealer's mechanic said
    to try better gas. So I tried Exxon 88 octane. Manual calls for 87
    octane. Still pings. I even tried a tank of hi octane and it still
    pings. Gets around OK.

    Grumpy, Jun 19, 2006
  4. Grumpy

    Edward Hayes Guest

    If your concerned why not run a bottle of TECHRON FUEL SYSTEM CLEANER
    in the gas. Be sure and get the system cleaner concentrate and NOT the
    weaker injector cleaner.
    Edward Hayes, Jun 19, 2006
  5. Grumpy

    Grumpy Guest

    Thanks, I'll give it a try. I had already tried some "octane booster" to
    see if it reduced the pinging. No luck.

    Thx, Grumps.
    Grumpy, Jun 19, 2006
  6. Grumpy

    AS Guest

    Yes, Pinging particularly when cold.
    AS, Jun 19, 2006
  7. Grumpy

    News Guest

    The local dealer in Oregon took a ride with me a couple of times over a
    week - late last Spring. As I had anticipated, the ping was reduced or gone
    in the cool, moist air of the morning, but obviously back in the warm
    afternoon. He pretty much came out and admitted that Subaru doesn't have
    much to say about the issue. Ambient outdoor temperature and seasonal gas
    reformulation plays a major role, as far as he knew.

    I tried premium gas...with good success. Now that I've switched back to
    unleaded for economy reasons, the ping is back with a vengeance. I also
    tried the Chevron Techron additive. It seemed to work, but it's a $5 to $7
    expense every 1500 to 3000 miles.

    Short answer long... Subaru knows about the issue, but they don't seem to
    have a cookie-cutter solution. In general, they point the finger at the
    fuel system electronics and shrug their shoulders saying "We can't do
    anything about it. There is nothing we can adjust."
    News, Jun 20, 2006
  8. Grumpy

    Grumpy Guest

    Thanks for the input. I have a dose of Techron working right now and
    will see what happens. Premium gas had no effect.

    I'll cross my fingers......

    Grumpy, Jun 20, 2006
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