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Misfire with faultcode



  172 ph1, r5, clio16v
Injector screwed, failed open and been squirting fuel into cylinder constantly hence the black plug.
Seen this a couple of times before in extreme cases shorts and burns injector drivers and kills the ecu.
 
  pb ph2 172
Changed all four injectors to ones from a 182
still miss firing so I e changed plugs coil pack etc to no avail
only thing that's changed is now all 4 plugs get covered with black soot
and black smoke comes out of the exhaust
 


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