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Does the smart have a heartbeat?

1259 Views 5 Replies 6 Participants Last post by  SmartDigger
Hi, I drive a new Suzuki Alto down here in Australia. A review of the car I read said three-cylinder engines have a distinct "heartbeat" throb at idle and mine sure does. Have any of you smart owners noticed anything similar?
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Since day one, mine's had a barely noticeable irregular beat when idle and AC is off (950 RPM)... just the nature of the engine's harmonic vs the shape of everything around it. Bring it up to 1050 RPM (A/C on) and it's smoother. Only seems like a defect if you're used to a larger engine. I'm running stock everything - so if new plug designs smooth it out, I'll upgrade because that means cleaner combustion at idle - which is a lot of time in city streets.
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