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Username Post: 216 dual carbs no power        (Topic#374161)
Posts: 17

Reg: 11-29-23
12-13-23 05:31 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 08:12 PM. Reason for edit: Moved to correct forum


Valued Contributor
Posts: 3275

Loc: Lake George, NY
Reg: 11-11-15
12-14-23 02:44 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 03:08 PM. Reason for edit: No reason given.

Posts: 590

Loc: Portland,Or
Reg: 12-06-09
12-15-23 08:32 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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