I'm posting this because there is little info on this problem. Sorry if it's a double post.
Problem:
I had a rythmic idle that would rev from 1000 to 1600, the drop down, rev, drop, etc. Two trips to honda and 3 mechanics advice, no help.
Solution:
The Fast Idle Control Valve (thats what I've heard it called, might not be right) malfunctioning. This valve is on the bottom of the throttle body held on with 3 bolts. On the right side is a coolant inlet held on with 2 screws and on the other side is a plate held on with 2 screws. Unscrew the plate (after removing from the engine, at least I did.) and screw that plastic piece back in firm. Don't over tighten, it just needs to be in, not tighened down. It will take 2 screw drivers because it's larger diameter than a quarter and the slots are only on the outer edge.
Work:
When I pulled mine and removed the plate, the plastic piece was loose, not even screwed in. BAD. I screwed it in firm and put it back on, idle was fine. No revving and sitting at a little over 1000 cold. I need to adjust the idle speed on the throttlebody because it's completely closed for my bad idle and the cold engine doesn'y like starting easy. Starts up, but a little rough. And I plan to adjust my timing.
Info:
The coolant runs through the FICV and the throttle body. Using the coolant temp, it gives the intake more air for cold starts and warming up the engine.
I thought I should post this because this problem is kinda common, but it's not easy to find good info on it. I had to find this fix out using google searching after 2 shop visits and 3 mechanic's suggestion didn't do anything. This did not cost a dime, so if you are having any idle problems, check this part and it might help. The idle change was night and day and I should see a gas milage improvement from it. I'll hop on goole and see if I can't find some pics of what to look for.
Problem:
I had a rythmic idle that would rev from 1000 to 1600, the drop down, rev, drop, etc. Two trips to honda and 3 mechanics advice, no help.
Solution:
The Fast Idle Control Valve (thats what I've heard it called, might not be right) malfunctioning. This valve is on the bottom of the throttle body held on with 3 bolts. On the right side is a coolant inlet held on with 2 screws and on the other side is a plate held on with 2 screws. Unscrew the plate (after removing from the engine, at least I did.) and screw that plastic piece back in firm. Don't over tighten, it just needs to be in, not tighened down. It will take 2 screw drivers because it's larger diameter than a quarter and the slots are only on the outer edge.
Work:
When I pulled mine and removed the plate, the plastic piece was loose, not even screwed in. BAD. I screwed it in firm and put it back on, idle was fine. No revving and sitting at a little over 1000 cold. I need to adjust the idle speed on the throttlebody because it's completely closed for my bad idle and the cold engine doesn'y like starting easy. Starts up, but a little rough. And I plan to adjust my timing.
Info:
The coolant runs through the FICV and the throttle body. Using the coolant temp, it gives the intake more air for cold starts and warming up the engine.
I thought I should post this because this problem is kinda common, but it's not easy to find good info on it. I had to find this fix out using google searching after 2 shop visits and 3 mechanic's suggestion didn't do anything. This did not cost a dime, so if you are having any idle problems, check this part and it might help. The idle change was night and day and I should see a gas milage improvement from it. I'll hop on goole and see if I can't find some pics of what to look for.
