LS1 fuel tank (Plastic 99-02 style)
Junior Member
Joined: Aug 2014
Posts: 4
Likes: 1
From: Florida
Car: 91 Camaro & 95 Camaro
Engine: V6 & V8
Transmission: Auto
Axle/Gears: 3.23
Re: LS1 fuel tank (Plastic 99-02 style)
Yes, but I only did it to create an easy access panel to get to the fuel pump from the top, instead of dropping the entire gas tank out from the bottom. It’s too much work for replacing fuel pump underneath the car all the time. You don’t have to do that, but it is easier to get too.
Member
Joined: Dec 2003
Posts: 489
Likes: 0
From: wv
Car: 92 rs
Engine: 355 stealth ram, dart heads, S480
Transmission: 4L80E
Axle/Gears: 3.42
Re: LS1 fuel tank (Plastic 99-02 style)
my question about this is the ls tank has 2 wires for the fuel level (purple) are we to splice them together? I was afraid that would cancel out the signal to the gauge
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: LS1 fuel tank (Plastic 99-02 style)
ALL fuel level senders have two wires. And no you don't connect them, you answered your own question
Junior Member
Joined: Aug 2014
Posts: 4
Likes: 1
From: Florida
Car: 91 Camaro & 95 Camaro
Engine: V6 & V8
Transmission: Auto
Axle/Gears: 3.23
Re: LS1 fuel tank (Plastic 99-02 style)
Here is the wire harness for the fuel pump which I spliced the black wire and the purple wire (far end) together.
Member
Joined: Dec 2003
Posts: 489
Likes: 0
From: wv
Car: 92 rs
Engine: 355 stealth ram, dart heads, S480
Transmission: 4L80E
Axle/Gears: 3.42
Re: LS1 fuel tank (Plastic 99-02 style)
thank you... that’s exactly what I needed to know.
Junior Member
Joined: Nov 2004
Posts: 34
Likes: 1
From: Concord, CA
Car: 1989 Camaro IROC Z-28
Engine: 2002 LS1
Transmission: T-56
Axle/Gears: 3.08
Re: LS1 fuel tank (Plastic 99-02 style)
Apologies for asking a question that may have been answered, but I'm seeing conflicting info. Does the above wiring connections to the PCM work correctly or like some of the others have commented, does the PCM need the 4th gen cluster to complete the circuit with the fuel gauge? (In an application like above - LS1, corresponding PCM, 4th gen plastic tank)
Junior Member
Joined: Mar 2018
Posts: 7
Likes: 0
Re: LS1 fuel tank (Plastic 99-02 style)
I had read entired posts, but some of it is confusing and doesn’t make any sense. There’re people had asked the same questions about hooking up LS1 plastic fuel tank along its EVAP canister, but no one really didn’t answer his/her questions nor explained step by step procedures. Anyway, I have installed a LS1 plastic fuel tank, plastic fuel lines, LS fuel pump, and its EVAP canister to my both 95 Camaro LT1 and 91 Camaro V6. By doing some experiments with it, this is my results and hope to share my info on it.
{pics removed}
I hope this can be helpful to those who want to hook up your LS1 Plastic fuel tank and its Evap canister.
{pics removed}
I hope this can be helpful to those who want to hook up your LS1 Plastic fuel tank and its Evap canister.
Anyways, I have a 2000 Fbody and the evap solenoid in the engine bay has been removed where it connects to the intake and the evap vent line in the engine bay is venting to atmosphere. Evap is turned off in tune. Don't like the idea on venting to atmosphere. If I cap the evap line in the engine bay will the tank have venting issues or will it be fine since the charcoal canister is still attached? How can I fix this and have a clean engine bay without using the factory solenoid?
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: LS1 fuel tank (Plastic 99-02 style)
If the evap is disabled in the tune then you can remove any solenoid. Just leave the charcoal canister on the 99 tank
Junior Member
Joined: Mar 2018
Posts: 7
Likes: 0
Re: LS1 fuel tank (Plastic 99-02 style)
What about the evap line that runs from the tank up to the engine bay? If you plug that, won’t it create tank pressure issues? That kind has to be vented to atmosphere even if the stock charcoal canister is present, correct?
Joined: Sep 1999
Posts: 4,353
Likes: 308
From: NJ
Car: 92 Firebird
Engine: 4.8 LR4
Transmission: T56
Axle/Gears: 3.45 9 Bolt
Re: LS1 fuel tank (Plastic 99-02 style)
I just have the canister on my 4th gen plastic tank and I don't have any issues, the evap purge is not controlled
Senior Member
Joined: Mar 2013
Posts: 556
Likes: 12
From: South Carolina
Car: 92 Vette, 83 Camaro
Engine: 305 going to 95 LT1
Transmission: 5 speed going to T56 6 speed
Axle/Gears: 3.73 posi with disc brakes
Re: LS1 fuel tank (Plastic 99-02 style)
Interesting topic. I have been working on my project since 2013. I sent my 95 Caprice ECM out to be set up to run my LT1. I hope the guy didn't disconnect the evap circuit as I plan on using it to purge my fourth gen tank. If he did disconnect it or disable it, I can manually ground the purge valve with a switch. The ECM just grounds the purge valve during certain situations. It opens when not in idle and WOT.
Re: LS1 fuel tank (Plastic 99-02 style)
So if I want to run the plastic 4th gen tank and have access to a V6 model, I can use it in an 87 TPI car? Do I just buy the V8 pump/hanger assembly and run the corvette regulator to factory 3rd gen line going to the fuel rail?
Senior Member
Joined: Mar 2013
Posts: 556
Likes: 12
From: South Carolina
Car: 92 Vette, 83 Camaro
Engine: 305 going to 95 LT1
Transmission: 5 speed going to T56 6 speed
Axle/Gears: 3.73 posi with disc brakes
Re: LS1 fuel tank (Plastic 99-02 style)
. 
Thread
Thread Starter
Forum
Replies
Last Post
donnj
Engine/Drivetrain/Suspension Parts for Sale
6
Mar 5, 2010 08:26 PM
