Rough Running w/ Dual Carbs, And now low fuel pressure too. Options

[Craigers17]

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]

#1 dead head fuel supply into gauge. If still 1.5 check resistance before and after pump and if none found replace pump.
Get dead head supply to 3+ before going futher.

#2 3+psi supply! pull lines from both carbs, place into 16oz bottle, test supply to both carbs (no pressure gauge) just checking flow.
8oz in each for 2 minutes run time is plenty. Usually fills up little bottles FAST, like 30 seconds.
Lots of flow. Your fuel supply works.

Connect system and check pressure system on not running. Should be same as dead head.

Always test your test equipment! Having another gauge available is preferrable.

The little cheap ass round "tuner" gauges are notoriously inaccurate!

If fuel supply is good take top off of carbs and inspect. Not nearly as hard as you think.

If you have a new gasket set available you won't need it and vice versa...

Pierce Manifold is a good source for Weber crap.

[Craigers17]

#1 dead head fuel supply into gauge. If still 1.5 check resistance before and after pump and if none found replace pump.
Get dead head supply to 3+ before going futher.

#2 3+psi supply! pull lines from both carbs, place into 16oz bottle, test supply to both carbs (no pressure gauge) just checking flow.
8oz in each for 2 minutes run time is plenty. Usually fills up little bottles FAST, like 30 seconds.
Lots of flow. Your fuel supply works.

Connect system and check pressure system on not running. Should be same as dead head.

Always test your test equipment! Having another gauge available is preferrable.

The little cheap ass round "tuner" gauges are notoriously inaccurate!

If fuel supply is good take top off of carbs and inspect. Not nearly as hard as you think.

If you have a new gasket set available you won't need it and vice versa...

Pierce Manifold is a good source for Weber crap.

I appreciate the tips. I'll give these a shot in the next couple days. I really think that opening the carbs is going to be the solution, and possibly replacing the fuel filter. Thanks for the Pierce Manifold resource.