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Shuddering/misfire

  #1  
Old 06-30-2010, 09:37 PM
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Default Shuddering/misfire

Hi! My first post so i hope i dont screw this up. I have -95 Accord EX vtec 4cyl and just replaced distr. cap, rotor and plugs (oem).My questions is i have a shutter or misfire when going thru the gears on light to moderate accelaration i would describe it as water in the distr.cap but it always been dry. It does not happen when i accelarate harder only light to moderate accel. By the way it's automatic. Hopefully someone has some idea were to look. I did search and came close but not completely. Thanks for any input. F1
 
  #2  
Old 06-30-2010, 09:57 PM
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Maybe a bad ignitor/ignition coil... Or bad wires... Any more info on replaced parts???
 
  #3  
Old 07-01-2010, 09:12 AM
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thats it as far as new parts. Might run it to the dealer and get a diagnosis. Thanks for your reply
 
  #4  
Old 07-01-2010, 02:07 PM
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Have the EGR ports been cleaned out?
 
  #5  
Old 07-01-2010, 02:11 PM
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was this issue there before you replaced the parts?? or did you replace parts because of it ??
 
  #6  
Old 07-02-2010, 09:39 PM
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the issue was there before i changed parts figuring it would be something simple like that. I will do the EGR cleaning this weekend according to DIY article. I hope that takes care of it if not i will have the dealer look at it. Thanks for getting bck guys. f1swede
 
  #7  
Old 07-02-2010, 11:54 PM
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I would suggest a cylinder balance test where you eliminate each cylinder under load and see how much each contributes. You brake torque(In gear with foot on brake) the motor up to the RPM that produces the miss and pull the spark plug wires out one at a time and note how much the engine RPM and smoothness changes. No change that cylinder is the miss. You will need a helper, the plastic piers for this task and use reverse instead of drive. If all the cylinders are about the same then you have something global that affects all cylinders such as the EGR.
 
  #8  
Old 07-03-2010, 09:40 PM
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3 out of 5 ports were clogged shut completely. Problem fixed thanks guys for all your feedback. f1swede
 
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