Engine Swap Everything about swapping an engine into your Third Gen.....be it V6, V8, LTX/LSX, crate engine, etc. Pictures, questions, answers, and work logs.

Ls swap

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Old

Mar 13, 2020 | 09:34 PM

#1

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Ls swap

Hey guys doing a ls swap on a 84z28 Needed a new fuel sending unit which came in today I also have my fuel pump question. My 1st swap trying my best to do all the work myself Fuel sending unit has 4 lines. From my understanding you only need 3 of them for the swap(feed, return, vent ) My question is (since sending unit didn’t come with instructions) which line do I not need(cut/plug) And which lines do I run for feed, vent, return

Old

Mar 14, 2020 | 07:44 AM

#2

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Joined: Feb 2001

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From: Cincinnati, OH

Car: '90 RS

Engine: 377 LSX

Transmission: Magnum T56

Re: Ls swap

Quote:

Originally Posted by Derek James

Hey guys doing a ls swap on a 84z28 Needed a new fuel sending unit which came in today I also have my fuel pump question. My 1st swap trying my best to do all the work myself Fuel sending unit has 4 lines. From my understanding you only need 3 of them for the swap(feed, return, vent ) My question is (since sending unit didn’t come with instructions) which line do I not need(cut/plug) And which lines do I run for feed, vent, return

Just trace the lines. The line that ends right over the pump mount is the feed. The shorter one is the return. The one with the white valve is the vent. The last is for evap.

Old

Mar 14, 2020 | 09:31 AM

#3

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Joined: Feb 2019

Posts: 21

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From: Illinois

Car: 92 Camaro RS

Engine: 5.3 LS

Transmission: 4l60e

Axle/Gears: 3.42

Re: Ls swap

What Shifty said. Also, this video might be helpful to you:

this has a lot of info too:

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