2006+ Honda Civic Forum banner

Dodgy Idle

3K views 10 replies 7 participants last post by  paulh37 
#1 ·
Saw a post on this a couple of months ago but cant seem to find it.

Last couple of days when driving long or short journeys, my idle jumps around, some times dips to as low as 500rpm then jumps up to 1.5krpm then back to 1k rpm then settles.

To make matters worse, when the idle settles the car feels like it shaking ever so slightly.

Anyone know the cure? Is it time to get an FD2 throttle body?
 
#2 ·
Try the idle learn procedure:


Procedure
  1. Make sure all electrical items (a/c, audio, lights, etc) are off.
  2. Reset the ECM/PCM (pulling the power by unplugging the battery works well).
  3. Turn the ignition switch ON (II), and wait 2 seconds.
  4. Start the engine. Hold the engine speed at 3,000 rpm without load (in park or neutral) until the radiator fan comes on, or until the engine coolant temperature reaches 194 F (90 C).
  5. Let the engine idle for about 5 minutes with the throttle closed. (NOTE: if the fan comes on, do not include its running time in the 5 minutes.
Be patient. If you don't get it just right, you may need to do the procedure a second time. Also, keep in mind that an erractic idle can also be caused by a vacuum leak, or you might need to clean you throttle body.
Info from: http://flashprotuning.com/blogs/vitviper/honda-ecmpcm-idle-learn-procedure
 
  • Like
Reactions: damien thorn
#4 ·
Try the idle learn procedure:


Procedure
  1. Make sure all electrical items (a/c, audio, lights, etc) are off.
  2. Reset the ECM/PCM (pulling the power by unplugging the battery works well).
  3. Turn the ignition switch ON (II), and wait 2 seconds.
  4. Start the engine. Hold the engine speed at 3,000 rpm without load (in park or neutral) until the radiator fan comes on, or until the engine coolant temperature reaches 194 F (90 C).
  5. Let the engine idle for about 5 minutes with the throttle closed. (NOTE: if the fan comes on, do not include its running time in the 5 minutes.
Be patient. If you don't get it just right, you may need to do the procedure a second time. Also, keep in mind that an erractic idle can also be caused by a vacuum leak, or you might need to clean you throttle body.
Info from: Honda ECM/PCM Idle Learn Procedure | FlashPro Tuning
Cheers Ash, will try this. I'm guessing the engine has to be cold when doing this otherwise you get to temperature quicker? Also, again assuming, this has no impact on map?
 
#8 ·
I have had two go now! Deffinatley sounds like the cause!
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top