Why does my 2004 Honda Accord idle up and down?
Re: Idle revs up and down The most likely issue is a vacuum leak, use carb cleaner, spray around the manifold to engine gasket, injectors, plenum gasket, throttle body gasket, MAP and IACV gasket (don’t spray the TPS). Check that all the vacuum lines are plugged in properly.
What should the idle speed be on a Honda Accord?
750 is spec idle speed. It should always idle near that speed with brief fluctuations as load increases or decreases. Cold start can be as high as 1800 rpm on a 4 cylinder, dropping as the engine warms.
What causes Honda Accord 4cyl to stall when warm?
I had a different idle problem two months ago that I never got to root cause on, see writeup here: 2005 Honda Accord 4cyl low idle and stalling when warm. Troubleshooting steps performed: Suspected poor air-flow. I removed and inspected the air filter. Air filter was fine.
What should the cold start speed be on a Honda Accord?
It should always idle near that speed with brief fluctuations as load increases or decreases. Cold start can be as high as 1800 rpm on a 4 cylinder, dropping as the engine warms.
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.
750 is spec idle speed. It should always idle near that speed with brief fluctuations as load increases or decreases. Cold start can be as high as 1800 rpm on a 4 cylinder, dropping as the engine warms.
I had a different idle problem two months ago that I never got to root cause on, see writeup here: 2005 Honda Accord 4cyl low idle and stalling when warm. Troubleshooting steps performed: Suspected poor air-flow. I removed and inspected the air filter. Air filter was fine.
It should always idle near that speed with brief fluctuations as load increases or decreases. Cold start can be as high as 1800 rpm on a 4 cylinder, dropping as the engine warms.
Why is my Honda idle problem coming back?
If you fail to bleed all the air out the idle issues will continue. If you find that the problem goes away after you bleed the air out of the cooling system but it comes back a few days later then check for a leak in the cooling system using the second video on checking for an overheat condition.