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reading plugs help- #1&3 are sooty black,fouled-#2&4 are white,looking lean

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reading plugs help- #1&3 are sooty black,fouled-#2&4 are white,looking lean

  #1  
Old 09-29-2013, 05:20 PM
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Default reading plugs help- #1&3 are sooty black,fouled-#2&4 are white,looking lean

What is this? Is it a bad fuel pressure regulator? Bad injectors? Bad ecu?
 
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Old 09-29-2013, 06:21 PM
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Default correction plugs 2&4 are good 1&3 are fouled bad

plugs 1&3 are fouled, 2&4 are good
 
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Old 09-29-2013, 11:57 PM
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Forgot to mention, I checked the fuel pressure regulator with the ignition in the on position and when I pull the vaccum hose off its not leaking. Does that eliminate a bad fpr? Or can they still go bad and not leak fuel?
 
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