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Shade Tree Mechanic
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i have read where several people use an electric fuel pump just to assist starting and when needed.
at times in a parade or puttering along the coupe sputters and racing the engine for a second clears it up. question is, how do you intall a pump as a backup so it doesnt interfere wit the vacumn tank operation?
1928 NATONAL AB COUPE
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Technical Advisor ChatMaster - 10,000
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Place the electric fuel pump in a box and set it up on a shelf in the garage. 
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Shade Tree Mechanic
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OP
Shade Tree Mechanic
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wish i had thought of that
1928 NATONAL AB COUPE
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Shade Tree Mechanic
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OP
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but if thats the case, its cheaper not to buy one in the first place. hows that for a brainstorm?
1928 NATONAL AB COUPE
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Doesn't sound like your problem is lack of fuel. Just the opposite most likely over fueling at low speed or idle.
With a vacuum pump increasing the engine speed reduces the vacuum which would reduce the fuel pumped. Just the opposite of a mechanical pump.
Likely racing the engine temporarily clears the rich condition. It is best to fix the problem not try to cover it up with an added thingy.
How Sweet the roar of a Chevy four!
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So what advice would you '28 experienced folks give someone with his problem of:
"...at times in a parade or puttering along the coupe sputters and racing the engine for a second clears it up."
Would cleaning and checking the carb be his first task? fuel line? fuel filter? or what?
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Shade Tree Mechanic
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1928 NATONAL AB COUPE
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Maybe, I would first look to see if the choke is parcially closed. Then see if hammering on the carb will fix it. ...Then if everything else ....(prayin', cussin', and beatin' the headlights off)...fails, maybe, just maybe, it is time to contact an old timey mechanic!
Gator I don't know if these are the way to fix the car, but I have seen a lot of people doing it that way, they always wait till everything else fails before looking for a qualified mechanic, trying to save money, don't you reckon?
Life's a long winding trail, love Jesus and ride a good horse!
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Are not all of us qualified? 
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Shade Tree Mechanic
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I am having a simular problem with my 28 sedan. It runs great for about 5 minuets, then starts to die. If you pump the gas pedal it come back to life and the cycle repeats. I checked over the carb (which has been recently rebuilt), and found nothing. Now I am into the vaccume pump. It seems that someone "fixed" the flaot to the point where it would barley float, and seems to be sticking in the tank. I have ordered a new float, and will let you know if that fixes the issue.
Good luck and happy hunting.
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Backyard Mechanic
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Backyard Mechanic
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We have had a number of customers have the vacuum check valve to the vacuum tank fail; causing raw gasoline to be diverted from the tank to the engine, bypassing the carburetor.
Jon.
Good carburetion is fuelish hot air
Owner, The Carburetor Shop (in Missouri)
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I had that type problem with one of my 1928s on the Crater Lake, OR tour. Once I discovered what the problem was, I would then disconnect and plug the vacuum line to the intake manifold. Discovered I could go almost 5 miles before it would start running out of gas. Just stop and reconnect the vacuum line and let it run a few minutes and was off for another 5 miles. When we finished that days tour I took the tank apart and repaired the vacuum valve seat. No more problems and finished an excellent tour.
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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I would suspect that the new float or cleaning to eliminate sticking will solve both problems. If the valve seat is loose super glue is a good adhesive to hold in place.
How Sweet the roar of a Chevy four!
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Shade Tree Mechanic
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IT SEEMS YOU ALL ARE CORRECT AGAIN. GOT THE COUPE OUT THIS WEEKEND AND AFTER RUNNING A FEW MINUTES THE MOTOR WOULD START FLOODING.TIME TO GET INTO THE VACUMN TANK I GUESS. TIME I FOUND OUT WHAT THE INSIDE LOOKS LIKE. WHERE CAN YOU BUY FLOAT OR REBUILD KIT IF I NEED IT?
1928 NATONAL AB COUPE
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Technical Advisor ChatMaster - 10,000
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It may be best to put your vacuum tank in the hands or an experienced mechanic. However, instructions for rebuild have been placed on this forum and some kits and float are available from Gary Wallace.
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Shade Tree Mechanic
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SOUNDS GOOD BUT I CANT FIND A MECHANIC THAT CAN FIX A 2001 DAKOTA, NEVER MIND A 28 CHEVY IN THIS AREA
1928 NATONAL AB COUPE
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Can't help you on the Dakota, but send me an email and I will get you in contact with a good Antique Mechanic.
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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Shade Tree Mechanic
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OP
Shade Tree Mechanic
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SENT YOU AN EMAIL.
THANKS, MIKE
1928 NATONAL AB COUPE
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