 Carb Help, Accelerator Pump Jets at Idle |
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| mtc911 |
 Feb 18 2022, 07:13 PM
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#1
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Member  Group: Members Posts: 65 Joined: 18-March 18 From: Atlanta Member No.: 21,978 Region Association: South East States  |
Had my carbs off - as engine and trans was out for some rust repair.
Threw some new seals in there (rebuild kit) Trying to tune…can’t get them set up right….finally noticed one side i have the accelerator pump jets “spitting” fuel even at idle. Obviously this is throwing things off. Other side is not doing it…just the one side. Jets are clean…can hear the ball in there. All new seals and i cant cause any change in idle with the carb cleaner test spraying around the seals. Have done a ton of research but i dont see any “adjustment” anywhere for the accelerator pump…if i push up on it during idle (from below the carb) I can stop the flow but as soon as i release pressure on that little arm that actuates the pump with my finger they will start “spitting” again and idle will increase. Have loosened / adjusted and retightened the rod and it sees to be opening and closing the flap thing “butterflies” just fine…its good and tight. Anyone have any ideas what might be out of whack? Weber IDF 40 Dual Carbs Thanks |
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| mtc911 |
Feb 19 2022, 04:26 PM
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#2
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Member Group: Members Posts: 65 Joined: 18-March 18 From: Atlanta Member No.: 21,978 Region Association: South East States |
Found a thread online somewhere…forgot where now…where someone had added a “shim” in the accelerator pump between the diagram and the little arm thing…did that and stretched the spring a bit to add some pressure….(ordered a couple new ones online as well…to refresh later)
That fixed it….thinking maybe that spring was worn out and not putting enough pressure on that little cam and the butterflies….they were sealing up very well so that was not my problem… Anyway - that fixed it…little bit of a shim….was able to get it running and driving really well. Appreciate all the tips as always…such a helpful group here..love it |
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| Superhawk996 |
Feb 19 2022, 05:09 PM
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#3
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914 Guru Group: Members Posts: 5,900 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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QUOTE(mtc911 @ Feb 19 2022, 05:26 PM)  Anyway - that fixed it…little bit of a shim….was able to get it running and driving really well. Always like an easy fix! (IMG:style_emoticons/default/beerchug.gif) Glad you got it fixed. |
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Posts in this topic
mtc911 Carb Help Feb 18 2022, 07:13 PM
914Toy My guess, one or both float valves are not stoppin... Feb 18 2022, 08:20 PM
mtc911
My guess, one or both float valves are not stoppi... Feb 18 2022, 08:39 PM Shivers Did you set the float height? If that float was to... Feb 18 2022, 09:32 PM mtc911
Did you set the float height? If that float was t... Feb 18 2022, 09:36 PM Shivers
Did you set the float height? If that float was ... Feb 19 2022, 12:00 AM 73-914 How is your fuel pressure? Feb 19 2022, 08:04 AM Robarabian Accelerator pump set nut set properly? 7mm from to... Feb 19 2022, 08:44 AM Superhawk996 Take a very close look at the way the butterfly is... Feb 19 2022, 09:07 AM Shivers
Take a very close look at the way the butterfly i... Feb 19 2022, 09:12 AM Superhawk996
If this is indeed the case, and it is possible, ... Feb 19 2022, 09:30 AM |
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