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Hello
I need help identfying a scew on my 2bbl Keihin carb that’s on a 86 Honda Accord LX, 2.0L, auto trans, with ac. My fast idle is too high and I would like to know if the blue screw with the yellow arrow pointing at it is the right screw to adjust to bring it down. The pic is of the back of my carb on the passenger side. Is this my fast idle adjustment screw?The white arrow is the throttle stop screw and is just a reference point.
I’m hoping to get an answer to this because Eric works on Hondas and carbs. Seems to be a simple question but no one has answered it yet on other sites.
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Your carb might be due for an overhaul or replacement by the way.
Also try finding your cars service manual or something, those are great.
Your carburetor might need rebuilding. I have a 3bbl Honda Keihin carb on my 1984 Honda Accord, and the throttle stop screw (as the manual called it) was a long black horizontal screw that you could turn by hand (although it wasn’t the easiest thing to get to) – it looks very similar to the large red screw in your picture, and it faces the firewall. But your 2bbl carb is probably different. Does your car ever “diesel” upon shutting the engine off, or hesitate/stumble upon acceleration? When mine was doing that, I took the carb to some pros who rebuilt it – the power valve was damaged and was siphoning raw fuel down the intake manifold. Engine didn’t like that. Ran so much better after it was rebuilt, and if you’re lucky, they’ll give you a good warranty to come back and check out the carburetor again for free (90 days in my case).
I did some searching and found someone with an ’87 Accord LX who was going through similar problems to yours, by the sound of it. Maybe look through and see if it helps. I also agree with the above poster on looking at the manual for your specific vehicle. It’s just like the manual for my ’84, they’re huge and very useful.
1987 Honda Accord Service Manual on eBayYour idle speed screw should be acting directly on the throttle linkage at the carb. Take a look in that area.
The carb was replaced last year. with a new remanufactured one because it was flooding badly. The fast idle on new carb has always been to high and I just wanted to bring it down some. The red screw I know for sure is my throttle stop screw.
No dieseling or hesitation or stumble on acceleration after replacing carb.
I just wanted to know if the screw painted blue was the fast idle screw adjustment. I didn’t want to mess with it if its not. I do have the service manual but it only shows a drawing which doesn’t really help. I can’t find a actual photo like mine so I decided to take a pic of it. . I have been on that site but my problem is I can’t download the photo on there for some reason.. They could most likely answer yes or no to my question about the blue screw. Thank you for doing the research I really do appreciate it Temeku.
Decon Blues thanks for the attachments but unfortunately that’s not my carb.
Evil-i will do
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