1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Fuel pump problem

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Old 04-29-11, 08:39 PM
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Fuel pump problem

Ok I have a 1980 rx7 it used to be supercharged but I jacked it up so now im just returning it to n/a but my problem is i cannot get fuel to the carburetor. the battery is fully charged everything is connected right, when i turn the key to the on position i can hear the fuel pump spin but no fuel i changed the fuel filter thinking it was clogged but still no fuel so can anyone help me out? o ya its not the stock fuel pump and its located in the engine bay and not by the gas tank and since i mess up my sc its been sitting for about 6 months

thx

Last edited by ddrlegendx; 04-29-11 at 08:50 PM.
Old 04-30-11, 01:16 AM
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have you ever tried pulling the line off the ouput end of the pump and checking it?
Old 04-30-11, 01:24 AM
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double post
Old 04-30-11, 02:24 AM
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Is the flow going the correct way? Is it a self priming pump? If not, thats a long pull for a pump, theyre supposed to be gravity fed if theyre non self priming.

~T.J.
Old 04-30-11, 07:58 PM
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yes its self priming and the flow is going the right way. and its a mr gasket co 42s fuel pump if that helps.
Old 04-30-11, 09:42 PM
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the fuel pump should be as close to the tank as possible. long fuel draws can cause problems, been there. locate as close to the tank as possible.
Old 04-30-11, 11:18 PM
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thats what im thinkin it is and thats what im gonna do when i get my mallory fuel pump in a few days. i took off the fuel pump and ran it just by itself with no lines attached. im not an expert when it comes to fuel pumps and dont know what 2-3.5 psi should feel like but it felt pretty weak when i felt the air being sucked in and blown out. and is there any thing else this could be like a problem in the fuel tank?
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