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Intank fuel pump replacement. Couple questions.

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Old Sep 25, 2007 | 03:21 PM
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From: Greenville WI
Car: 91 Firebird
Engine: Turbo 355
Transmission: T-56
Axle/Gears: 3.73:1 7.625" 10 Bolt
Intank fuel pump replacement. Couple questions.

I will probably end up doing this this winter. How do I go about doing this without cutting my existing steel fuel line? If so, what parts would I need to do this right? I don't want any rubber line in there anywhere. I plan on dropping the axle as well. Any suggestions?

Last edited by zacharyhorn; Sep 25, 2007 at 03:25 PM.
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Old Sep 25, 2007 | 04:00 PM
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Re: Intank fuel pump replacement. Couple questions.

If you're dropping the tank you wont have to cut any lines. There are connections on each of the lines you can take apart.
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Old Sep 25, 2007 | 04:44 PM
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Car: 1982 Trans-Am
Engine: 355 w/ ported 416s
Transmission: T10, hurst shifter
Axle/Gears: 10 bolt, true-trac, 3.73
Re: Intank fuel pump replacement. Couple questions.

I was going to say that, but on an FI car with the higher pressure fuel lines, it's the same way? (I'd guess so, they had to put the tank up there in the first place).

What's wrong with the stock pump? Is it dying, or are you going purely mechanical on that?
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Old Sep 25, 2007 | 04:50 PM
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From: Greenville WI
Car: 91 Firebird
Engine: Turbo 355
Transmission: T-56
Axle/Gears: 3.73:1 7.625" 10 Bolt
Re: Intank fuel pump replacement. Couple questions.

So I would just take the tank down and take the o-ring / sleeve off and pull the pump all connected? I'm sort of confused on how the whole in-tank pump comes together inside the tank. So I can use all my existing lines?
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Originally Posted by Sonix
I was going to say that, but on an FI car with the higher pressure fuel lines, it's the same way? (I'd guess so, they had to put the tank up there in the first place).

What's wrong with the stock pump? Is it dying, or are you going purely mechanical on that?
Sonix, see my thread in the carburetor section on fuel pressure problem. Let me know what you think.

Last edited by zacharyhorn; Sep 25, 2007 at 04:52 PM. Reason: Automerged Doublepost
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Old Sep 25, 2007 | 04:52 PM
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Re: Intank fuel pump replacement. Couple questions.

Yea, there's a pressure relief valve on the driver side (one of the 4 lines) and right next to that there is a high pressure rubber line on the feed line with swaged fitting that has your typical o-ring/saginaw flare fitting that can be disconnected with a couple wrenches. I dont remember offhand what the return line has, IIRC its a similar setup. The charcoal canister line is just hose clamped in place, along with the pressure relief/vent line.
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The tank comes down with the sender, wires, some length of line all there. Once you drop the tank then you take off the ring around the sending unit (it turns, use a hammer and screwdriver or the like) and you can remove the sender and get to the pump. The pump is in a cradle with 2 wire connections and a 'pulsator' and the sock. Its easy to replace, once you're there.

Last edited by madmax; Sep 25, 2007 at 04:54 PM. Reason: Automerged Doublepost
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