Chicago1

All I seem to find are the 3 wire ls1 to ls7 adpters like this.
http://www.ebay.com/itm/LS7-LS3-5-Wi....c100677.m4598


Then I came across this
LS2 to LS3/LS7 MAF Adapter
http://www.speartech.com/product_p/ls3mafadapter.htm

Is mine considered a ls2 style plug? Would that even work?

Someone point me to the link so I can order been searching for a bit still confused. Thanks,

HPS MASTER TECH

look at your intake. if your iat sensor is separate from your maf you would use the “3” wire.

HPS MASTER TECH

personally i hate adaptor harnesses like these. i buy the pigtail harnesses and hard wire them.

Chicago1

I have the 5 wire ls1 not the 3 its not separate thus the issue of finding one. I had a lingenfelter but it didnt work and the wires were backwards.

ls1 maf pinout





ls3/7



So I know lingenfelter sells a harness for a100mm maf that is plug and play..



The pins would be off and on the other side. I had this before and didnt work and cant find it anymore. I had asked about this a long time ago but figured I would start a new thread. If you look for 5 wire ls1 to ls7 you wont find much

HPS MASTER TECH

search ebay for the ls3/7 maf pigtail. just cut your connector off and hardwire it. you already have the pinout diagram. just connect the wires where there supposed to go

Chicago1

Good idea

Chicago1

Got a new harness and the pins are wrong on that one too. Now I just want to know how folks are using these if they are pinned wrong? I tried taking the pins out of teh other harness and fubared it even with the correct pin tools. Here is how it should be and why do they all say ls2 why not include "late ls1"

how it should be late LS1/2 to LS3/7 below..


A to D-low reference-purple
B to E-iat=tan
C to B-ground-black/white
D to C-ignition-pink
E to A-maf=yellow


here is the lpe plug according to that picture.

lpe plug to ls1/2

a to e-maf=yellow-CORRECT-(yellow)
b-ground going to D ignition=incorrect-(black)
c-ignition voltage to c ground-incorrect-(pink)
d-low reference to B iat-incorrect-(tan)
e-iat going to A low reference-incorrect(tan)

neutron82

what about getting an ls7 maf pigtail and hardwiring it to your harness?... personally I would rather have it that way, looks cleaner and less points of failure... or you could do speed density

Chicago1

I could do that but the point now is trying to figure out how all these guys are using these harnesses with no issues. I just purchased a caspers harness that has a breakout for the iat since i have one welded to the hard pipe. So ill swap pins on that one if need be. I emailed lpe 2x about their harness and they haven't responded I called too but it was after hours.i just want to know what I'm missing because it seems wrong to me

Chicago1

Update:I just got this one saturday..LS2 to LS3 MAF ADAPTOR W/ IAT BREAK OUT 108205 it is the correct one. The 108136 is not..If you don't need the breakout then you need MAF ADAPTER HI-DENSITY SMALL 5 PIN TO GT p/n 108124. the only issue with that one is the iat and low reference need to be swapped BUT I don't think that matters since it's just for the iat but someone please correct me..