Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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Original Post (Thread Starter)
#488237 12/31/2023 10:56 PM
by Dennishawk
Dennishawk
ugh. help. I have a 1948 dually flat bed with a 1954 235 new in 2010. Hardly any miles and little driving since swap.
Just installed Petronix kit and coil, rebuilt Rochester 1b1 carb, new plugs and wires, new fuel pump (4.5 psi) She starts no problem. Idles around 700. She drove perfectly after engine swap.
Problem is she's got now power.
Also cannot find BB on fly wheel but playing with timing has no change in performance. I did check number one cylinder compression with rotor position.
I also removed the vacuum advance from carb to distributor.
Could the valves need adjusting.
I also checked compression on each cylinder. (i did not do by the book yet, but i will). I checked without removing all the plugs!
What am i missing? thanks for the wisdom in advance
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#488261 Jan 1st a 04:57 PM
by Chev Nut
Chev Nut
Forget the timing light and rotate the distributor into different positions and see if it helps.
Install the original points and see if that helps.

You say no powre. Does that mean the engine shuts down or just will not go any faster.
Is the power piston in the carburetor stuck.

The engine may be new to you but it is impossible to be a "new engine".
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