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Bit of a rough idle on my 94 civic....any ideas?

Discussion in 'General Tech and Maintenance' started by guts311, Aug 13, 2004.

  1. guts311

    guts311 Junior Member

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    Aug 13, 2004
    I have a 94 ex coupe with a frankenstein Si head on a gs-r block, and when i start my car and let it idle for a bit, the exhaust will make a few short barely noticeable sputtering noises, same as the engine...the rpms stay around 900-1100 all the time which sounds normal but it just sounds like small twitching engine and exhaust noises..like if u stand near the car or behind it...nothing too noticeable though...and the car drives great, no problems...so why might the idle be like this and the car be making "back-firing" type noises every so often at idle?
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