What to do when your Honda engine is idle?
If you’re sure you don’t have any vacuum leaks, and you’ve bled the air out of the cooling system, and you still have a problem, then check the IAC (Idle Air Control valve). You can do this by tapping on it with the butt of a screwdriver while the engine is running.
What causes a Honda Accord to idle erratically?
This article is for a hunting or erratic idle, the original idle speech was for a ‘shaking’ or ‘rough’ idle. For that, check out the other link about Honda idle issues. Step 1, check for air in the cooling system. This is the most common cause of an idle issue on Honda’s. Especially if you just serviced the cooling system.
Can a Honda EGR cause it to idle?
EGR will not effect idle unless it’s stuck open. Many people go here but to be honest it’s hardly ever the cause of an idle problem on a Honda. When the EGR is a problem it often causes a miss under load NOT an idle issue.
Is the Honda J series V6 engine bad?
BTW the Honda J series V6 engines from about 99-2004 are famous for IAC problems in fact, you might even see a check engine light for it. If you do it’s a good idea to check it as I’ve outlined here and replace it if you find that it’s bad.
Why does my Honda engine idle all the time?
The computer then commands the idle air control valve to open to the correct setting. However, any vacuum leak in the system can screw this up. The extra air leans out the mixture and the engine starts to die. So the computer tries to compensate by adding fuel.
How to test the fast idle valve on a Honda?
3) Once the engine coolant is above 90 degrees F, you can proceed to test the fast idle valve. Start the engine and remove the vacuum line on the lower portion of the throttle body. Check for vacuum. There should be NONE.
Where is the idle air control valve on a Honda?
5) Finally, check the idle air control valve. There’s a port in front of the throttle plate. That port feeds the idle air control valve and the base idle screw.
How to fix a surging idle on a Honda?
How to fix a surging idle on Honda vehicles 1) Start by making sure the cooling system is filled with coolant and there’s no air in the system. If it’s low on… 2) Remove the air duct from the throttle body. Then start the engine and cover the throttle body with a solid object… 3) Once the engine
Can a PCV valve cause an idle problem?
I’ve actually seen aftermarket PCV valves cause idle problems in some cases, usually a rough idle. The PCV valve is actually a controlled vacuum leak so if it’s not calibrated correctly it can cause idle issues. So if you’re running an aftermarket PCV you might want to exchange it for an OE unit.
Why does my Honda Civic idle too high?
When cold you just get an idle that is too high like up around the 1200-1500rpm range or higher. The second video shows a vacuum leak that I found on a Civic using a ‘safer’ method for checking for vacuum leaks. Both work but the important thing is that you check for vacuum leaks if you have a Honda idle problem.