Rough Running w/ Dual Carbs, And now low fuel pressure too. |
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Rough Running w/ Dual Carbs, And now low fuel pressure too. |
Craigers17 |
Jun 8 2024, 01:19 PM
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#1
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Senior Member Group: Members Posts: 814 Joined: 5-August 17 From: Rome, GA Member No.: 21,317 Region Association: South East States |
So I've been trying to track down a rough running issue with my 2056 w/ dual 40IDF's. It has not been running well for several months, and has had spells of sitting for a while. When these issues started, probably 9 months ago now, I changed out the old fuel filter and relocated the pump and filter to the front and upgraded both to the type that Tangerine sells. I also took that opportunity to install a stainless steel line and all new rubber lines. (the problem existed BEFORE I did all of this)
Recently, in the last week or so, I replaced both manifold and carb gaskets. I haven't actually opened up the carbs yet, but have cleaned all the jets. After this work, I had it running great for about a quarter mile, and then started backfiring and bogging down. I have a fuel gauge and also noticed that it is now only reading about 1.25 to 1.5. It normallly sits around 3 consistently. I suspected maybe I had a fuel line that was kinked under the tank, so I pulled it and they are fine with no leaks. I am thinking that the fuel filter may be clogged after having sat dormant for so long, OR, I might have some clogging going on in either my fuel "T" splitting the carbs or in the "T" that contains the gauge. My only other guess is that something is going on with the floats. I know this post is a lot, but if anyone has any ideas, please feel free to chime in. Thanks! |
technicalninja |
Jun 9 2024, 11:21 AM
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#2
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Advanced Member Group: Members Posts: 2,259 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
Once I had my carbs set, jetted and timed with the other carb they ran great. But now and then it would all of the sudden start to spit and run like heck. After a bit of hunting I found it was always the main jets. I made a tool that held one brissel off my wire brush that I kept in the car. Pull off the air filter, unscrew the jet stacks on top of the carb, one at a time and use that wire to clean out the jets. That was the only problem I had @Craigers17 Thanks. I'll check the main jets again, now that I have run fuel through them, but I JUST cleaned them before I ran the car. Not at all uncommon to get debris the bottoms of the bowls and to continually pick up garbage into the jets until the bowl is cleaned out, and the on-carb strainers cleaned. (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) And, you don't have to take them off of the manifolds to do this (or change a popped float). Ripping the tops off is GRAVY... A little air, B12, rags and the bowls are clean. I'd use a big "dog" towel to catch the resulting spray. Pull tops, clean bowls, adjust change floats/needle and jet, clean jets. A "poor boy" carb rebuild would take me less than 1 hour for both... |
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