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Old 05-13-2008, 11:56 PM   #1
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Can I use an in line fuel pump w/o removing the tank pump?

This is purely to save me lots of hassle, I can't get the bad fuel pump out of the fuel tank where the car is now(gravel driveway), and I don't want to cut an access hole in the trunk unless I've exhausted all other possibilities. So, can I leave the bad pump in the tank, unplugged, and install an in-line pump without a problem occurring?

One more question, to siphon out the gas, is there one of those safety screens in the filler neck? (Haven't looked yet, but I figure, since I'm posting one question..)
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Old 05-14-2008, 12:07 AM   #2
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Re: Can I use an in line fuel pump w/o removing the tank pump?

Might as well try, worst case it doesnt work and you have to remove it anyway.

Both me and my buddy use a mechanical with the intank stil in it and it works fine. Some people say it doesnt work at all, some people stay it starves for fuel.

Ive never been able to siphon fuel but hose is cheap, just try it.
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Old 05-14-2008, 12:27 AM   #3
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Re: Can I use an in line fuel pump w/o removing the tank pump?

I was not able to siphon gas out of my stock 88 tank.
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Old 05-14-2008, 11:21 PM   #4
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Re: Can I use an in line fuel pump w/o removing the tank pump?

So, any other ideas on how to get the gas out of the fuel tank?
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Old 05-15-2008, 10:13 AM   #5
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Re: Can I use an in line fuel pump w/o removing the tank pump?

I just syphoned gas out of my 87 the other day......

Also, i dont know if my car has an "in tank" fuel pump, but its pumping fuel with the mechanical one on the block like it did with the carbed cars.
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Old 05-15-2008, 10:31 AM   #6
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Re: Can I use an in line fuel pump w/o removing the tank pump?

I was able to siphon out my tank on my 1985 305 TPI car without a problem.
I converted that car to carb from fuel injection, and tried to use just a mechanical pump to pull through without removing the electric fuel pump and I could not get enough pressure. So I ended up putting in a bypass regulator and just using the stock electric fuel pump. I have heard people claim that they have done the pull through without an issue though.
It will probably work for you, but may make the new pump work a little harder than it would if it didnít have to pull through your original fuel pump. Which might cause your new fuel pump to have a shorter life.
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Old 05-15-2008, 12:47 PM   #7
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Re: Can I use an in line fuel pump w/o removing the tank pump?

Honestly, the inline fuel pump may work and then again it might not. Your best bet is to do it right the first time, ie remove the intake pump and replace. Chances are you will give yourself more headaches in the future by cutting corners and leaving the old pump in the tank. Just my thoughts.
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Old 05-15-2008, 02:23 PM   #8
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Re: Can I use an in line fuel pump w/o removing the tank pump?

During resto, I put a new intake carb pump. two years later when I was ready to fire it up, no fuel pump. Wanting to run it now and not wanting to tear back into the tank area, I put a mech fuel pump on and it Runs like a top. This winter, when I have time I will tear it back down and fix the intake pump.Having no issues with drawing fuel through the intake fuel pump.
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Old 05-15-2008, 02:23 PM
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