youztheclue Posted May 21, 2018 Share Posted May 21, 2018 (edited) This is my first carburetor car and I am still getting rid of the intake and exhaust leak from the rear cylinders with a gasket I ordered. My issue now is the car runs fine at idle, but the second you take it down the road and try to get it moving the carbs seems to run out of fuel inside the bowl. My 260z has a filter athe bottom of the tank to electric pump, up the body to the engine bay into large cannister filter to vacuum mechanical fuel pump to dual Weber carbs. The 3-5 psi required by carbs I easy for the newish pump under the car now. I am thinking that the mechanical fuel pump cannister in the engine bay of my 260z should be bypassed by the electrical pump I have near the gas tank. I believe the fuel delivery is my issue with a engine that can be running the suddenly die after burning a bit of gas with a longer rev. When I'm able to I'll try to see if I can pressure test the system and see if it's better to bypass. Edited May 21, 2018 by youztheclue Quote Link to comment Share on other sites More sharing options...
Miles Posted May 21, 2018 Share Posted May 21, 2018 (edited) Intake leak = lean sag upon opening throttle. Fix the leak first. Many many recent posts on the problem you are having. Edited May 23, 2018 by Miles Quote Link to comment Share on other sites More sharing options...
youztheclue Posted May 22, 2018 Author Share Posted May 22, 2018 I have a dual Weber setup. I originally thought I just had a exhaust leak but im sure the intake is leaking too. The gaskets should be here this week I'll update when I get everything back together. Quote Link to comment Share on other sites More sharing options...
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