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92 Subaru wagon knock problem
Posted 23 June 2003 - 03:26 PM
Posted 23 June 2003 - 04:26 PM
It's possibly you got some weird gas, run some dry gas through. Also, you may have severe carbon buildup in the combustion chamber and the carbon is staying hot and igniting the a/f mix rather then the plug.
Try running premium. If that doesn't change how the car reacts, it's probably something other then the carbon, or at least that may not be the major culprit.
Posted 24 June 2003 - 03:47 PM
Thanks for your reply. The car is perfectly tuned with new plugs, timing belt, pvc valve etc. done about six months ago. I tried some strong fuel injector cleaner a while back but it made no difference. To decarbonize it I guess I could get the engine nice and hot and then use a vacuum hose to suck a little water into the intake manifold. On the other hand since the problem does not occur all the time I thought that maybe one of the sensors was at the end of its life.
Posted 24 June 2003 - 04:33 PM
Posted 25 June 2003 - 06:36 AM
If that does nothing, it's goin to be more difficult to try and track it down.
Posted 27 June 2003 - 06:04 PM
Could you clue me in to this "water trick"?
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