Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks
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54 BelAir 235. I come back from snow birding and I’m having a problem keeping the car running. I noticed smoke coming up from below the carb on the exhaust manifold. Will this affect how the car runs? I’ve also noticed the fuel filter leak where it never has before. It seems to build up pressure into the carb. I plan to replace the gaskets but I’m curious if that’s the fix?
Change the filter and check for leaks. If the gas filter is leaking causing the smoke it could be a BIG problem. If it is just an exhaust gasket leak then not and issue of fire but does need repair.
7472 old site post
I’m thinking it might be the fuel pump. I’ve switched the carb and it acts the same way like the carb is flooded and will start and run only with the petal floored like when it’s flooded. The fuel filter is leaking on both sides, the fuel line has excess pressure when I disconnect it from the carb and a small leak showed up on the fuel pump outlet. I’ll report back after I replace the fuel pump!
Do you still have the stock pump?
7046 old site posts
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1938 Master Business Coupe-Sold, now living in New Jersey
1953 210 Sedan
Im not sure it’s the original but it has the vacuum connections for the wipers. I may have pulled it when I switched to an electric wiper.
The reason I asked is, some folks put electric pumps on and many of those put out more pressure than the stock needle & seat in the carburetor can handle. That could be pushing too much gas past the needle & seat.
7046 old site posts
Save a life, adopt a senior shelter pet
There are many good people. If you can't find one, be one.
1938 Master Business Coupe-Sold, now living in New Jersey
1953 210 Sedan
@tiny thanks
that’s what’s happening now with the existing mechanical pump, I think it’s flooding the carb.
Did you use a new production fuel pump, or rebuilt an older pump?
I have both seen and heard that many new mechanical pumps have too much pressure.
I’ve been using reproduction ones from Napa. I’ve had one in the car for several years without a problem. End of last season the car would hardly run. Put it away until this spring. Same problem. When I was trying to figure it out I noticed the fuel filter leaking from both side I tried to remove it it has came out like it was pressurized which I never noticed before. I put it back together and found I could get it started if I held the accelerator down like it was flooded. I replaced the fuel pump and I got no fuel to the carburetor, replaced the fuel pump with another one and same thing. I’ve checked all the fuel lines and nothing was blocked. So the mystery continues! Someone recommended I test the fuel pump to see if one side has vacuum and other has pressure when pump the lever. Tomorrow’s mission.