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Posted on Sep 03, 2010
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Engine miss fire with no apparent cause or problem

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  • Master 3,489 Answers
  • Posted on Sep 03, 2010
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If you are just talking about the codes regarding misfires, this can be triggered by inferior spark plugs. Stick with NGK or Nippon Denso for this car. If you are refering the to an actuall feel of a misfire, double check all coils and wires for tracking which will be white trails that indicate an electrical leak and shorting to ground(the engine block). Let me know which one.

  • goldaw Sep 04, 2010

    scanner shows irratic misfire on #2 cylinder, checked the compression which is good, then moved coil and injection from #2 cylinder to #1 cylinder,then moved #1 to #2. engine scanner still showed irratic misfire on #2 cylinder. sparks plugs replaced with ngk

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96 E250 300 ci Was running perfect then started missing Replaced vacuumed hoses, found 1 loose spark plug, and 3 that were finger tight. Replaced all 6 plugs.
If your 96 E250 300ci was running perfectly and then started missing and the code is indicating a miss fire in cylinders 1 and 2, there could be a few potential causes. Here are a few steps you can try to troubleshoot and resolve the issue:
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  2. Check the fuel system: Make sure that the fuel system is functioning properly. Check the fuel filter, fuel pressure, and fuel injectors for any signs of wear or damage.
  3. Check the compression: A compression test can help to determine if the engine is getting enough compression to run properly. Low compression in cylinders 1 and 2 can cause the engine to miss fire.
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  5. Check the PCV valve: The PCV (positive crankcase ventilation) valve can become clogged or malfunctioning and cause the engine to run poorly and miss fire.
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2000 MR2 Spyder

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96 E250 300 ci Was running perfect then started missing Replaced vacuumed hoses, found 1 loose spark plug, and 3 that were finger tight. Replaced all 6 plugs.

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