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idle / idling down issue

Started by Toy4Bob, March 26, 2012, 09:26:45 PM

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wakdady

#45
July 13, 2012, 05:30:44 PM
The three orings in this kit, where do they go?

http://www.rpmracingca.com/proddetail.asp?prod=Carb%3Arebuildkit3&cat=24

Motoguy

#46
April 30, 2013, 08:05:10 AM
Thank you Pat Conlon for the concise 4 step troubleshooting guide. I have been lurking around this site since acquiring my 31K 1990 FJ. The forum has been informative,helpful and inspirational for me. After many mods and maintenance I took my bike for the first ride of the year and encountered the high idle. I thought I might have a cable routing issue because it idled fine in the garage with the tank off. I looked it all over and found it to be fine, tested it in the garage with the tank on and idle was 1K. I took it to work today and  it idled down at the gas station (1 mile from home) but at the next stoplight (2 miles) the idle was 2K when I got to work the idle was 2.3K. If I touch the choke the idle drops and after the bike cooled off the idle is fine again. Now I had a very good description of the symptoms and checked the FJ forum  :yahoo: ! I am going to check my idle screws at lunch and expect that my bike will run perfectly on the way home. After that Chain and sprockets and A stop at my friends house to use the carb stix and I am done! (for now, more mods planned)
I will post in new members with a description of my FJ journey so far soon. Thank you everyone @ FJ Owners!

Jeff Sandback

Pat Conlon

#47
April 30, 2013, 09:36:13 PM
Glad it helped Jeff.
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

Motoguy

#48
June 22, 2013, 07:00:59 AM
As excited as I was I adjusted the idle screws and no change :unknown:. I removed the tank and mixture screws (don't drop the little o-rings or washer) and sprayed carb cleaner through the gallery and put back together at 4-1/4 turns out. No change. Now I am convinced that when I adjusted the floats I must have gotten it wrong and have my level too low and am not drawing enough fuel through. I had an extra float drain screw and fashioned a real time float height tool to see what each carb is at while running. They were all perfect. I borrowed a carb sync tool from a friend and found that the one carb I replaced was out of synch. 20 minutes later all carbs were synched and idle at 900 rpm. Put it all back together and went for a ride.  :good2: Perfect! I now have a reliable daily driver. I never thought carb synch could affect idle like that. Lesson learned. Thanks again FJ Owners.

Arnie

#49
June 22, 2013, 11:16:11 AM
Ok, you've got it running well.  Now adjust the idle speed up to 1050-1100rpm.  It'll idle smoother, make less noise, and generally perform better.

Arnie
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