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I started parking my 98 Honda Civic Ex in the garage and not driving anywhere from 1-3 days.

I've noticed when starting it stumbles and feels like a very slight misfire for about 5-10 seconds then clears up and drives fine.

Never noticed it when parking outside even for same duration of not being driven.

The garage does feel slightly cooler than outside temps, I wonder if it's condensation building in the cylinders or something?

Addendum: So I went into the garage today and it felt pretty damp in there. I wonder if that's contributing to it. How could I lessen the dampness?

ohmmy
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2 Answers2

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IIRC, the 98 Honda Civic has a distributor, not a coil. I've experienced something similar with my 99 Nissan Almera. Basically, when it's cold and humid moisture condenses inside the distributor and causes misfires. At least that's my theory. In my case, the misfires go away after a few minutes, not a few seconds, but I have a feeling it may be the same underlying problem.

It's also possible, as @Moab said that after sitting a few days too much fuel pressure bleeds off, and it's just taking a few seconds for the fuel pump to pressurize the lines. If that's the case it could be a problem with either the check valves in the pump, return line or leaky injectors any of which could cause the pressure to slowly bleed down over time.

Robert S. Barnes
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Check your IACV hoses. They draw in water vapor, the water vapor dries, and leaves a sort of calcification build-up. Over the years this can develop a partial blockage.

justinm410
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