 914-6 Weber 40IDA adjustment problems |
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| hars914 |
 Mar 12 2005, 08:23 PM
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Member  Group: Members Posts: 114 Joined: 6-January 03 Member No.: 94  |
I just rebuilt my carbs for my six. I got the car warmed up and started tuning them.
First when I turned the mixture screws on one of the carbs the idle did not change unless I just about turned them all the way in. The other carb did not change much at all when I turned the in or out. When I tried to adjust the air correction screws on both carbs I could not get them to all read the same on the sync tool. I was geeting a lot of backfiring thru thru the carbs. What is my problem here??????? |
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| Carl |
Mar 12 2005, 10:11 PM
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Ummm ... what? Group: Members Posts: 781 Joined: 17-January 03 From: San Jose, CA Member No.: 163 Region Association: Northern California |
It could be a variety of things. Since you rebuilt the carbs I'll guess that you got ALL the crap out of the passages that feed the idle circuit because it doesn't take much to plug a jet and mess up the idle.
How are the bushings for the butterfly valves? Try spraying a little carb cleaner around the ends of the throttle shafts to see if the idle smooths out any. If it does then you've got worn bushings and air leakage. Also, try the carb cleaner trick around the bases of the carbs and look for the same result. Again, vacuum leaks will really cause problems with carbs. All the carb gaskets are good? Backfiring or spitting through the throttle bodies usually indicates that the carbs are lean. Back out the idle mixture screws some and it should settle down. What is are the specs of the idle jets, air correctors, mains, etc? Were these changed from stock? Is this a stock engine with stock cams? If you're not getting a change by adjusting the air bypass screws and the engine is giving you a "lean spit", it seems to me that you've got vacuum leaks. |
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Posts in this topic
hars914 914-6 Weber 40IDA adjustment problems Mar 12 2005, 08:23 PM
MecGen Hey man
Put the "6cyl" in the title heading and yo... Mar 12 2005, 08:26 PM john rogers You need to make sure the fuel pressure is about 3... Mar 12 2005, 10:18 PM J P Stein It sounds as if they are reacting just about as th... Mar 13 2005, 01:15 AM MecGen Guru Help...score
http://www.914wo... Mar 13 2005, 07:01 AM hars914 Thanks for the help.I will check for vacum leaks a... Mar 14 2005, 06:26 AM 9146986 Here's a copy of my post from 9/22/04
Assumpt... Mar 14 2005, 08:01 AM Eric_Shea I just did this and found that "much" of what you... Mar 14 2005, 09:01 AM
Thorshammer All of these are good points, however I would like... Mar 14 2005, 10:57 AM |
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