Tip & How-To about Honda Civic
If your honda idles erratically then you can bet it is the idle control solenoid, but first check that there is no vacuum leak in the intake manifold.
Instead of getting one from a dealer or getting one from a junkyard which might be in the same condition that what is in your car, you can actually refurbish the idle control. It is because of all the times I have worked with honda with idle problems ( fuel injected models) It is due to corrotion in the idle control or blockage in the coolant passage. Here are some tips. If the car idles ok when cold but then it fluctuates when warmed up. That is due to blockage in the coolant passage. Either the little hoses that supply the coolant or the pipes or the blockage is in the idle control itself. Coolant must be able to circulate in there.
If the idle fluctuates warm or cold engine, then it is more likely the idle control is stuck in the open position. What happens is there is too much air bleeding into the manifol via the idle control causing the idle to go up, but then the computer senses it so it tries to bring the idle back down then lets it go and the cycle keeps repeating and you get an engine that idles up and down. The cylinder in the idle control must be able to move freely and it can be remedied with wd40. On blockage it can be cleaned with soft wire and flushed with water. When there is nothing binding movement and coolant can circulate in the idle control then it would work like it was new again.
Posted by Ronado... on
Nov 30, 2011 | 1990 Honda Accord
Jul 25, 2009 | 1999 Honda Accord
Sep 21, 2017 | 1997 Mitsubishi Galant
1,232 people viewed this tip
Usually answered in minutes!