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Old 31 Oct 2007, 02:36 pm
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Default why does my 2000 honda civic idle so low?

my honda civic idles so low that sometimes my engine cuts out. how do i fix this problem? rpm idles just above the zero mark at times, and other times just below the 1???? this car is a civic sir
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Old 31 Oct 2007, 02:40 pm
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You may need new spark plugs, or wires. Your alternator or battery may be bad, also check your fuel pump and filter, that may cause problems like that as well. For an engine to cut out, one of two things must be wrong, either there is not enough air going in, or not enough gas, also, if it is in too high of a gear, the motor could be stressing and it may be a transmission or clutch thing sucking the energy of the engine, and not putting it on the road, I'm no mechanic, but farmboys got some pretty good guesses.
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Old 31 Oct 2007, 02:42 pm
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Have the throttle body cleaned that usually fixes low idle conditions. Auto Tech 25 years
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Old 31 Oct 2007, 02:45 pm
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All engines have a idling screw on them. Usually it's under a cap on top of the engine and the cap is made not to look like a cap at all so you don't know its there. They do it so you don't do it yourself.
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Old 31 Oct 2007, 03:00 pm
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I had this problem with an accord of mine back in the day after putting a few mods on it, noteably, an AEM cold air intake. My car was an automatic, so I'm not sure if that was as much of a contributor, but here's what I did...Somewhere on your throttle body will be a tiny rubber plug, if you lift this plug up, you'll be looking at what looks like a tiny head of a screw set into the throttle body itself, this actually will adjust your throttle plate depending on the direction you screw it. Normally if you "loosen" it, it's going to cause the throttle plate to open up ever so slightly. This will mainly effect the car only when your foot is not on the gas. It is because if something is not letting air into the intake manifold (perhaps your idle air control vavle or the area between the throttle plate and throttle body are dirty) then the engine won't be getting enough air, and will be almost like suffocating the engine. This will cause it to stall out or idle very rough. I tinkered with mine and got the idle back up to a very good level and later when I took it to the dealership for something unrelated, I brought up what I had done and the mechanic told me that it was something that only authorized mechanics should mess with. How well that rings true, I'm not sure, but I know I got the results I needed and everything seemed fine. A couple months later a dude slid out of a BP gas station and totaled my car, so I can't really tell you the long term effects, haha!
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