LS swap Fuel pump confusion... help!
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Junior Member
Joined: Aug 2015
Posts: 10
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From: Chicago
Car: 1985 Camaro Iroc-z
Engine: 4.8 Ls
Transmission: 4l60e
Axle/Gears: 342 10 bolt
LS swap Fuel pump confusion... help!
Hi everyone!
I have a 1985 Camaro iroc z that I recently dropped a LS 4.8 in. I’ve gotten most of the harness mocked up so that’s ready to go, but I think I made a mistake when pulling the original tpi. I sold the engine harness too him as well, not thinking I’d need to use it. Now, I’ve gotten to the point where the engine cranks, but I don’t Understand how to get my fuel pump to work with the LS harness. I have a feeling when I sold the engine harness that fuel pump relay connector was with it. What do I do? I would like to retain the Stock fuel pump style inside the fuel tank. Thanks.
I have a 1985 Camaro iroc z that I recently dropped a LS 4.8 in. I’ve gotten most of the harness mocked up so that’s ready to go, but I think I made a mistake when pulling the original tpi. I sold the engine harness too him as well, not thinking I’d need to use it. Now, I’ve gotten to the point where the engine cranks, but I don’t Understand how to get my fuel pump to work with the LS harness. I have a feeling when I sold the engine harness that fuel pump relay connector was with it. What do I do? I would like to retain the Stock fuel pump style inside the fuel tank. Thanks.
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: LS swap Fuel pump confusion... help!
You could get a TBI harness to adapt, or just put a relay in to drive the pump. When I did my 4.8 harness, I ran a "hotwire" kit exactly like Racetronix does, I ran a 10 gauge wire down the tunnel, tied to the fuel lines, waterproof relay in the back, and the LS harness triggers the relay in the stock factory harness through the car.
Thread Starter
Junior Member
Joined: Aug 2015
Posts: 10
Likes: 0
From: Chicago
Car: 1985 Camaro Iroc-z
Engine: 4.8 Ls
Transmission: 4l60e
Axle/Gears: 342 10 bolt
Re: LS swap Fuel pump confusion... help!
You could get a TBI harness to adapt, or just put a relay in to drive the pump. When I did my 4.8 harness, I ran a "hotwire" kit exactly like Racetronix does, I ran a 10 gauge wire down the tunnel, tied to the fuel lines, waterproof relay in the back, and the LS harness triggers the relay in the stock factory harness through the car.
Ok I’m just gonna say screw ignition and put a switch race car style. Would you happen to have pictures or know where the fuel pump wiring is in the interior of the car? I’ve looked and looked I can’t find anything still. I know I found a connection by the top of rear end on the floor. But do I have to tie into that or is there a wire I could tie into in the interior? Thanks!
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