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Discussion Starter · #1 ·
Are the fuel pump rods different froma small block to big block? Ihave a new fuel pump and cannot get it to pump any fuel, I used the one from my small block because I was told they were the same. thanks
 

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Steven,
They are the same I put one in my engine and had no problems.
 

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Steven, The fuel pumps are different, they will bolt on to the block but will not work correctly.
 

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Discussion Starter · #4 ·
Sorry my wording looks confusing I have a big block fuel pump just used the same pump push rod from my small block.
 

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Did you get any fuel to pump yet?? You should be able to read vacuum on one side of the pump and pressure on the other. Pour a small amount in the carb and start the engine, I found it will prime easier if the engine starts than if you are just cranking.
 

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Discussion Starter · #6 ·
I hooked up my electric pump to see if it would pull gas from the tank, nothing I know they are designed to push gas not pull it but I thought I would try it. I also have about 3 gallons of gas in the tank, I do not have the return line plugged off but I believe it is supposed to be open because it is just a vapor return line for the charcoal canister. Anyone have some idea?
 

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Did you push the rod up before inserting fuel pump,the pump will still bolt in place but no fuel will pump,i have been their,done that,this happened to me when i installed mine in my 454,thought i had rod up and i didnt. GOOD LUCK
 

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MR454SS has a good point, the pump will bolt on whether or not the pushrod is up against the actuator arm of the pump. You can use a little dab of grease on the pushrod to hold it in place while you put the pump on. I do believe the pushrods are different from a small block to a big block.

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Steve

72 Chevelle SS402/4sp
 
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