hdbob5454
Poster
Posts: 51
Reg: 11-29-23
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12-13-23 06:31 PM - Post#2864912
just got a 40 it has dual carbs and no power starts up fine but feels like running out of gas, vacuum leak?
Edited by Tony on 12-13-23 09:12 PM. Reason for edit: Moved to correct forum
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 Shepherd
Valued Contributor
Posts: 3442
Loc: Lake George, NY
Reg: 11-11-15
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12-14-23 03:44 PM - Post#2864948
In response to hdbob5454
From here tough diagnosis, fuel delivery issues, carb issues, general condition of engine and tune. Start with the basics, sufficient fuel delivery to carbs.
Edited by Shepherd on 12-14-23 04:08 PM. Reason for edit: No reason given.
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1971BB427
Contributor
Posts: 608
Loc: Portland,Or
Reg: 12-06-09
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12-15-23 09:32 AM - Post#2864966
In response to hdbob5454
Lot of things can cause a lack of power. A vacuum leak usually makes an engine run at a higher idle than normal. I'd be checking point gap, and timing also. And really go through a complete tuneup.
If that doesn't help then need to check fuel pump pressure, and start looking at the dual carbs to make sure accelerator pumps are giving a good squirt of gas when the throttle is opened.
1969 Suburban 2wd 350
1939 Chevy pass. coupe 350/700R4
1937 Austin gasser 327/TH350
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