Project 5.3 ls1 in Jeep JK... need help!
#1
JK Enthusiast
Thread Starter
Join Date: Jul 2008
Location: Dubai
Posts: 359
Likes: 0
Received 0 Likes
on
0 Posts
Project 5.3 ls1 in Jeep JK... need help!
Hi guys, so ive decided to put a 5.3 pullout froma 2004 subarban into my jeep jk.... i already have the the engine, transmission, PCM and wiring harness and have done loads of research but there is no info out there for LS1/JK combo... my parts from novak will be arriving next week.. so the project will be starting then, i will post loads of pic, anyways i have already choosen my fuel system and cooling system, but i still need help with the wiring harness and guage cluster, i plan on gutting the stock wiring harness and using stock GM guage cluster.... i will also need some help in figuring out how how to deal with the jk wiring harness!, so let me start with my questions....
if i remove the JK wiring harness and PCM will i still be able to use my headlights,wipers, fogs?
i plan on keeping the stock JK fuse box and splicing wires to connecting GM PCM wires to it , is that ok?
i will be dropping the fuel tank to install a walbro255 intank fuel pump, how hard will that be?
any more info is greatly appretiated!!!!
and so it begins....
pic of engine to get you guys started
I WILL BE POSTING ALL UPDATED PICS IN THIS POST
UPDATE: 4/10/2009 i have recieved my parts from novak and Tranny is on its way to get new putput shaft bolted in
Old stuff out
Tranny output shaft changed
progress is kinda slow i know but i finally got to engine where i want it.. yay
if i remove the JK wiring harness and PCM will i still be able to use my headlights,wipers, fogs?
i plan on keeping the stock JK fuse box and splicing wires to connecting GM PCM wires to it , is that ok?
i will be dropping the fuel tank to install a walbro255 intank fuel pump, how hard will that be?
any more info is greatly appretiated!!!!
and so it begins....
pic of engine to get you guys started
I WILL BE POSTING ALL UPDATED PICS IN THIS POST
UPDATE: 4/10/2009 i have recieved my parts from novak and Tranny is on its way to get new putput shaft bolted in
Old stuff out
Tranny output shaft changed
progress is kinda slow i know but i finally got to engine where i want it.. yay
Last edited by SLeepY_BoY; 10-11-2009 at 09:35 AM.
#3
JK Junkie
Its going to be a lot of work, but should pay off in the end. Lot more power than stock, and you should retain same, or possibly better fuel economy. Most chevy trucks with that engine manage 20-21mpg HWY.
You may just end up having to rewire a lot of the accessories. The JK fuse box should be usable, you are just going to have to do a fair amount of wiring.
Isnt the stock fuel pump in the tank?
What transmission are you going to use?
You may just end up having to rewire a lot of the accessories. The JK fuse box should be usable, you are just going to have to do a fair amount of wiring.
Isnt the stock fuel pump in the tank?
What transmission are you going to use?
#6
JK Enthusiast
Join Date: Aug 2007
Location: Ridgway, CO
Posts: 193
Likes: 0
Received 0 Likes
on
0 Posts
Good luck with the swap! When you get around to making the custom engine mounts, be sure to keep the pattern. I'm sure there will be others down the road who would like to do the same thing.
When I get rich and famous, I might try to put in a nice little LS7 into my JK....
When I get rich and famous, I might try to put in a nice little LS7 into my JK....
Trending Topics
#9
JK Junkie
Join Date: Aug 2008
Location: Vancouver B.C.
Posts: 2,207
Likes: 0
Received 0 Likes
on
0 Posts
Sounds cool, look forward to watching your progress on this....I think your electrical will be the biggest obsticle for you....good luck...what are the miles on that 5.3?
#10
JK Enthusiast
Thread Starter
Join Date: Jul 2008
Location: Dubai
Posts: 359
Likes: 0
Received 0 Likes
on
0 Posts
hi guys, im going shopping tommorow, for some misc parts, GM guage cluster and a few missing sensors on my engine, does anyone know if the speedo in the jk is mechanical or electcal?
im also going to check how much of my JK is controled by the PCM.... ill keep you guys posted.... pics will be up as soon as i get my stuff from novak by next week hopefully...... i will also try to document all prices of parts in this build.....
im thinking of running the JK with only GM pcm..... i hope HP tuner will make my life a little easier....
im also going to check how much of my JK is controled by the PCM.... ill keep you guys posted.... pics will be up as soon as i get my stuff from novak by next week hopefully...... i will also try to document all prices of parts in this build.....
im thinking of running the JK with only GM pcm..... i hope HP tuner will make my life a little easier....