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High Compression High Knock

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Old Jan 3, 2008, 02:11 AM
  #31  
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Originally Posted by chrisw
Just out of curiosity, have you checked the fuel pump? Is the fuel presure good?
Fuel preassure under load checked. Fuel pump swapped anyway.

What did you change with the fuel system?
pump, injectors, pressure regulator, fuel rail

How did the plugs look when you changed them?
They looked fine. There was slight difference in colouring on one cylinder but we later found valve leak on that one and fixed it.
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Old Jan 4, 2008, 04:54 PM
  #32  
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Was the head deburred after it was machined - I sure as **** know the machinist wouldn't have done it. Was the problem there before you found the leaky valve?
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Old Jan 7, 2008, 04:16 PM
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Yes.


The car is now fixed. IT seems it WAS some sort of fuel contamination that held for couple of tanks of fuel. But even after remap it won't make big power. Makes about 20bhp less then other Evos of similar spec.
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Old Jun 17, 2011, 12:23 PM
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edit:
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Last edited by michalek; Jun 18, 2011 at 02:45 AM.
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