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1998 Chevrolet S10

Question: P0300 Random misfire

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cryogenics, Friendswood, TX, February 11, 2009, 15:21

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I change out the ignition coil;fuel filter, wires,PVC,plugs,rotor & cap and air filter,clean thottle body check for vacuumm leaks. the codes was reset after driving for about 20 miles check engine light came back on check code same P0300 Random misfire

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• Answer #1

  Russ February 11, 2009, 20:08
  

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  Can you feel the engine misfire? Any other codes? Which engine is in your S10? Manual or automatic transmission?
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  Visitor, February 15, 2011, 18:18

  yes...no...2.2
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  Jim Taddei, February 16, 2011, 08:17
  

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  It look like you have taken care of the ignition possibilities. There still could be a mechanical fault - check compression. Or a fuel injector or injector signal fault. If you can feel the misfire, monitoring the engine with a quality scan tool should help pinpoint the cylinder causing the misfire.
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• Answer #2

  heavy_dman March 19, 2009, 20:16
  

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  As I have learned through trying to figure out my problem, a bad mass air flow sensor can cause misfire codes, sense it regulates and measures the amount of air that passes through, the three main components of a running engine is fire, fuel, and air, to much or too little air can cause all the problems that you have discribed, also the mass air flow sensor is notorious for going out on these engines
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• Answer #3

  Visitor, March 29, 2010, 06:12

  i would ck the popit nosil injectors(octo-puss style) thats the number 1 problem i have had with them sense day one
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• Answer #4

  Visitor, September 06, 2010, 16:33

  Pull out the trouble code on your vehicle and change whatever parts necessary
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• Answer #5

  Visitor, January 03, 2011, 18:07

  i change coil,spark plugs , wires, oil, and oil filter
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