2003 LQ4 swap
#1
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2003 LQ4 swap
I just purchased a 2003 LQ4 6.0l engine it comes with the computer wiring harness alt,p/s pump,starter, and intake w/ DBW throttle body . It has a 4l80e behind it now that I think I will not get (because of fitment issues), so how do I covert it to use a 4l60e trans and is there anything special I need to make sure I get for the DBW throttle body like another computer or something for it when I go pick it up, I don't want to forget to get something out of the truck when I go get it? BTW its going in a 1992 Trans Am convertible.
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Car: 1984 Formula ws6
Engine: 370 LSX
Transmission: 4L80E with a brake and 4500 Stall
Axle/Gears: Moser 9" 4.30 gear
Re: 2003 LQ4 swap
Same swap that is going in my car as we speak. Congratulations.
Basically uo can only use the block and internals. The intake and tb wont fit, the front accessories wont fit, the oil pan wont fit. Do get the ecu and wiring harness uncut though. Im running a t56, but I beleive the 4L60e will bolt right up.
Basically uo can only use the block and internals. The intake and tb wont fit, the front accessories wont fit, the oil pan wont fit. Do get the ecu and wiring harness uncut though. Im running a t56, but I beleive the 4L60e will bolt right up.
#3
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Re: 2003 LQ4 swap
I could use the throttle body with a ls1 intake though right? I plan on using a KWIK performance accessory kit. I have heard that the 4l60e has different pin-out than the 4l80 and computer needs to be re-programed for the switch confirmation on this would be great maybe some pics and charts to help with the change?
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Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: 2003 LQ4 swap
if you stick with dbw, you'll need the TAC unit and the pedal setup as well
the tb you have is most likely a 4-bolt style, so it will not work on the ls1/6 intake (they are 3 bolt).
wiring, you can see here (its 4l60e to 4l80e, but should be what you're looking for):
http://www.performancetrucks.net/for...&postcount=267
the tb you have is most likely a 4-bolt style, so it will not work on the ls1/6 intake (they are 3 bolt).
wiring, you can see here (its 4l60e to 4l80e, but should be what you're looking for):
http://www.performancetrucks.net/for...&postcount=267
#5
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Re: 2003 LQ4 swap
what intakes use the 4 bolt throttle body's? what does the TAC unit look like?
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Car: 91 Formula
Engine: lq4
Transmission: t-56
Re: 2003 LQ4 swap
yes you can use the throttle body. just need the pedal and tac module as said above.
look on ls1tech classifieds for fbody front accessories. i got all the brackets for i think it was 75 shipped off a guy parting out a wreck.
get a ls6 intake, an oilpan, remember you need to swap balancers on the crank to the fbody one, should be good to go.
as you have more specific questions, post up. my 91 bird has an 03 lq4 as well. take some pics too, we love pics.
look on ls1tech classifieds for fbody front accessories. i got all the brackets for i think it was 75 shipped off a guy parting out a wreck.
get a ls6 intake, an oilpan, remember you need to swap balancers on the crank to the fbody one, should be good to go.
as you have more specific questions, post up. my 91 bird has an 03 lq4 as well. take some pics too, we love pics.
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Car: 1987 Trans Am
Engine: LQ9/L92
Transmission: 4L60E
Re: 2003 LQ4 swap
my apologies, i mistakenly thought they had the 4-bolt TBs on the 03's, not the 3-bolt.
you'll need something that looks like this:
http://image.hotrod.com/f/incoming/9...ttle_bodiy.jpg
you'll need something that looks like this:
http://image.hotrod.com/f/incoming/9...ttle_bodiy.jpg
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#8
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Re: 2003 LQ4 swap
thanks techrunner any advise,tips and tricks,picts for the wiring integration to my car would be great too. I will get picts as soon as I get the motor in my hands, it is being removed from the truck it was in starting today, he is supposed to call when its out and I can go get it
#10
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Re: 2003 LQ4 swap
will the fuel injectors off the truck intake work on a LS1 or ls6 style intake , and is it best to wire the harness into the 3rd gen one or just run it plug and play separate from the 3rd gen one ? I will be getting the fuse box with the harness to.
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#13
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Re: 2003 LQ4 swap
motor stripped ready for new parts https://www.thirdgen.org/forums/atta...1&d=1301770104
#14
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Re: 2003 LQ4 swap
now for the wiring https://www.thirdgen.org/forums/atta...1&d=1301770231
Last edited by Dreambird; 04-02-2011 at 01:55 PM.
#15
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Re: 2003 LQ4 swap
what kind of fuel injectors would I need for a ls1 style intake I am purchasing a ls1 intake used and would like to replace the injectors and a not sure if universal accel or venom injectors would work?
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Car: 82 Berlinetta/57 Bel Air
Engine: LS1/LQ4
Transmission: 4L60E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Don't the truck injectors fit the LS1 intake and fuel rail? I understand the connector is different, but I didn't think the rest was different.
I could be wrong, and don't have any of the truck stuff around anymore, but that was the impression I had.
I could be wrong, and don't have any of the truck stuff around anymore, but that was the impression I had.
#18
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Re: 2003 LQ4 swap
I will be able too check it out soon I am going tonight to get a ls1 engine that has a bent rod off a guy w/heads short block cam intake assy. w injectors , fuel rail , throttle body , power steering pump, and possibly accessory brackets for 425!
#19
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Re: 2003 LQ4 swap
just picked up my new parts ls1 short block with one bent rod , heads , intake w/injectors ,fuel rail ,throttle body , power steering pump w/brackets, oil pan baffles and tube, misc bolts and valve train parts , and cam. What compression would my lq4 have with the ls1 heads? should I use the ls1 cam?
#20
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Re: 2003 LQ4 swap
camera batt. dead will post more picts tomorrow
#24
Re: 2003 LQ4 swap
They do fit the hole in the intake and fuel rail. A penny pincher can use the truck injectors and rail on a car style intake. Itll look awful though because it has a much taller hoop and the plastic fuel rails are massive logs
#30
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Re: 2003 LQ4 swap
old engine wires, C100 in car, C100 out of car starting to organize
#33
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Re: 2003 LQ4 swap
more cleaning and taping for paint
#35
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Re: 2003 LQ4 swap
assembly , heater lines and 4th gen coolant tank
#37
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Re: 2003 LQ4 swap
Corvette fuel filter and lines removed because of new style filter
#38
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Re: 2003 LQ4 swap
ready for install and new motor installed
#40
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Re: 2003 LQ4 swap
custom 4L80E transmission mount installed
#44
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Re: 2003 LQ4 swap
fuel rails and DBW throttle body installed
#46
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Re: 2003 LQ4 swap
engine harness de-loomed and labeled
#47
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Re: 2003 LQ4 swap
de-pinned and labeled, started routing wires
#48
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Re: 2003 LQ4 swap
more routing, removed harness and long process of soldering
#49
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Re: 2003 LQ4 swap
mounting DBW pedal and modding pedal and spring to work