Idle problem
Joined: Sep 2002
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From: NV
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Re: Idle problem
this is for 01-05 civics but some will still apply to you. if you cant find or dont have an FI ECU fuse, just disconnect and reconnect the battery.
whenever the throttle body or sensors are removed, you must complete the idle learn procedure otherwise the car will not idle properly. to do this, start the car and warm it to operating temp. you can drive around to do this and should not have too many problems except unsteady idle. park the car and turn it off. open the hood, locate fuse box, and remove the FI ECU fuse.

put the fuse back in, close hood, and start the car. let it idle for 10 minutes in park or neutral without using any lights/accessories or pressing the gas. after 10 mins, shut the car off. start it again and go for a drive like you normally would. it will take up to a full tank of gas for the ecu to relearn fuel maps and readiness codes. the idle will be set, but it may take a while until the ecu adjusts and you start getting good mileage again. do not perform these mods if you are having the car smog-checked immediately afterwards. it is a guaranteed fail. you need to wait at least 100 miles or more.
whenever the throttle body or sensors are removed, you must complete the idle learn procedure otherwise the car will not idle properly. to do this, start the car and warm it to operating temp. you can drive around to do this and should not have too many problems except unsteady idle. park the car and turn it off. open the hood, locate fuse box, and remove the FI ECU fuse.
put the fuse back in, close hood, and start the car. let it idle for 10 minutes in park or neutral without using any lights/accessories or pressing the gas. after 10 mins, shut the car off. start it again and go for a drive like you normally would. it will take up to a full tank of gas for the ecu to relearn fuel maps and readiness codes. the idle will be set, but it may take a while until the ecu adjusts and you start getting good mileage again. do not perform these mods if you are having the car smog-checked immediately afterwards. it is a guaranteed fail. you need to wait at least 100 miles or more.
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