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sanfra ... 7/29/2012
1998 Honda Civic EX 4Cyl1.6L - Engine
When I start it in the morning and don't warm it up, when I put it in drive there it has a rough idle for a second.
After the rough idle, it goes back to a normal idle. Occasionally when I come to a stop, it'll rough idle again for a second or two. What could be causing that? This all started after I gave it a tune up. I did spark plugs and wires, distributor cap, air and fuel filter.
2 Answers
  • HouseCallAuto
    HouseCallAuto 7/29/2012
    One of the spark plugs may have been cracked while installing, one of the spark plug gaps may have closed because you maybe dropped a spark plug as you were installing it. One of the ignition wires may not be seated all the way. Remove all the parts again, install 4 new spark plugs and see.
    sanfranfan9 7/30/2012
    Ok I'll try that! Thanks
    sanfranfan9 10/3/2012
    So I tries new spark plugs and that didn't work! Should I try new wires? I've tried reseating them several times, but it still does the rough idol when cold...
  • HouseCallAuto
    HouseCallAuto 10/4/2012
    Have you noticed any unexplained loss of any coolant from the radiator over time? This question goes to possible head gasket seepage of coolant into a cylinder after it is parked for the night.

    Yoiu need to plug in a code reader and see if any fault codes are stored that might identify a potential misfire on a specific cylinder.
    sanfranfan9 10/4/2012
    No I haven't noticed any loss of coolant.

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