4.0l xj 97 motor into yj 87 - Page 11 - JeepForum.com

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post #151 of 252 Old 10-11-2013, 01:06 PM Thread Starter
lbsickboy
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1986 YJ Wrangler 
 
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Hi was just thinking about the dubble vss i have.



Do i really need it the electric speed sensor that goes in at the transfer case?
can i just use the speed cable and just let the electric connector from the transmissiom.


http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #152 of 252 Old 10-11-2013, 01:23 PM
SLO_Ken
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The VSS tells the computer how fast the vehicle is moving. The computer then uses that information, along with inputs from all the other sensors, to control the spark timing and fuel delivery. You do not need the VSS to make the engine run, but you may experience some hesitation or stalling. It won't hurt anything to run without it, but if you start to have problems such as a rough running engine or stalling when coming to a stop, I'd recommend hooking it up.
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post #153 of 252 Old 10-12-2013, 01:02 PM Thread Starter
lbsickboy
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Quote:
Originally Posted by SLO_Ken View Post
The VSS tells the computer how fast the vehicle is moving. The computer then uses that information, along with inputs from all the other sensors, to control the spark timing and fuel delivery. You do not need the VSS to make the engine run, but you may experience some hesitation or stalling. It won't hurt anything to run without it, but if you start to have problems such as a rough running engine or stalling when coming to a stop, I'd recommend hooking it up.

ok thanks, i think i will just mount it anyway just to be on the safe side

i finished the exhaust today and took the beast for a spin man the power is unbelievable,definitely worth all the stress and hard work.

just cant seem to get the back up lights working
i had wired up the brown/white wire to the back up light wire brown/lihgt green on the c100 connector but with no success.

aslo i managed to get the vss connected up i had to make an adapter so i could use the old speed cable



now the next thing i connect was the vss these three wires
violet/orange = not needed
brown yellow = ground i need this acorrding to the link, post 142
white/orange = and i need this to, Sensor return (signal to PCM)

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #154 of 252 Old 10-12-2013, 01:25 PM Thread Starter
lbsickboy
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Would you happen to have an idea to get the fuel gauge to work ive tried but no go?

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #155 of 252 Old 10-14-2013, 02:54 PM Thread Starter
lbsickboy
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Well i have had a bit of progress today got the tacht working and drilled the thermostat house for the temp gauge.
Just cant get the bloody back up lights to Work

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #156 of 252 Old 10-15-2013, 08:13 AM Thread Starter
lbsickboy
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fotos of my thermostat house




http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #157 of 252 Old 10-15-2013, 08:40 AM Thread Starter
lbsickboy
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Update:
so ive got left to do 4WD transfer case linkage ( not to sure if im going to use the yj or xj set up)
ordered a new fuel gauge http://www.summitracing.com/parts/sun-cp8219 (coming next week)

and still no working back up lights

SLO Ken can you explain how i should connect the back up lights,
theres defintly somthing im doing wrong

what i have done is connected the brown wire (back up lights) to the c100 connector wire A15 brown/light green,
the yellow wire i haven't got a clue you said run start but this wire is coming of the yj bulkhead connector i tried that and the engine started up actually both of these wire are coming of the bulk head.

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #158 of 252 Old 10-15-2013, 11:56 AM
SLO_Ken
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Quote:
SLO Ken can you explain how i should connect the back up lights,
there's definitely something i'm doing wrong

what i have done is connected the brown wire (back up lights) to the c100 connector wire A15 brown/light green,
the yellow wire i haven't got a clue you said run start but this wire is coming of the yj bulkhead connector i tried that and the engine started up. actually both of these wire are coming of the bulk head.
Have you compared the figure in post 149 to your YJ? That figure shows the yellow wire connected to position C6 of the YJ bulkhead connector. The brown wire is shown connected to G6 on the YJ bulkhead connector.

The backup lights do not need to connect to the XJ harness at all.
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post #159 of 252 Old 10-15-2013, 12:07 PM Thread Starter
lbsickboy
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Quote:
Originally Posted by SLO_Ken View Post
Have you compared the figure in post 149 to your YJ? That figure shows the yellow wire connected to position C6 of the YJ bulkhead connector. The brown wire is shown connected to G6 on the YJ bulkhead connector.

The backup lights do not need to connect to the XJ harness at all.
i thought the brown wire had to be connected to the c100 connector

ive got the wires but dont know where to connect them to from of the bulkhead

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #160 of 252 Old 10-15-2013, 01:30 PM Thread Starter
lbsickboy
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if im right in thinking should i connecting the brown wire from of the yj g6 to the NSS wire brown/light green
Attached Thumbnails
image nss diagram.jpeg  

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #161 of 252 Old 10-15-2013, 02:19 PM
SLO_Ken
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Quote:
Originally Posted by lbsickboy View Post
if im right in thinking should i connecting the brown wire from of the yj g6 to the NSS wire brown/light green
Yes, you had them labeled correctly here... the C6 and G6 refer to the YJ bulkhead connector positions.
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post #162 of 252 Old 10-15-2013, 02:25 PM Thread Starter
lbsickboy
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Thanks for that,
I did try to connect it the c100 A15 thans the back up lights but i got nothing havent got a clue why.
Anyway so thans the Yellow wire,
would i still be meeding the yellow wire to compleet the sircut if yes where to connect that?

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #163 of 252 Old 10-15-2013, 02:55 PM
SLO_Ken
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I'm confused about why you are trying to connect the reverse lights to the XJ harness... Yes, A15 is the reverse lights circuit for the XJ, but your YJ lights are not connected to that circuit. They are (or should be) connected to the circuit at G6 on the YJ bulkhead connector.

Try this... On the engine side of your YJ bulkhead connector, put a temporary jumper (or temporarily twist the wires together) from C6 ylw to G6 brn. This should make your reverse lights come on anytime the key is in "run" or "acc". If the lights come on, then connect the ylw to ylw and brn to brn on the transmission harness. Now the lights should come on with the key, and the transmission in "R". If not, check your reverse switch at the transmission. The switch should be closed when the transmission selector is in "R", and open in every other position.

If the lights do not come on during the jumper test, unhook the jumper, (or untwist the wires,) and check the ylw for 12V(+) with the key in "run" or "acc". If this is good, then check the bulbs. If they are good, then there is a break or short in the wire between the bulkhead and the lights. If you do not get 12V, then check the "turn/BU" fuse in the YJ fuse block.
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post #164 of 252 Old 10-15-2013, 03:13 PM Thread Starter
lbsickboy
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OK i just checked the what you said the 2 wires together and with igntion turend to star run in reverse and yeeeee haa bingo they came on.

So thans sorted just one last thing SLO, i dont want to tracÚ a wire from the NSS
All the way to the bulkhead would you happen to know where the shortes way to connect the Brown wire to the PCM or the Transmission computer?
or am i taling out of my back end

http://www.jeepforum.com/forum/f12/4-0l-xj-97-motor-into-yj-87-a-1567705/
WANGLER 87 4.0 HO AW4
4,5 " ROUGH COUNTRY LIFT KIT, 1.5" BOOMERANG SHACKLES, 33'' BANDEN, ROUGH COUNTRY DUAL STEERING STABILIZER
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post #165 of 252 Old 10-15-2013, 03:31 PM
SLO_Ken
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The NSS wire is Black, not Brown...

It should have been connected to the G terminal on your original YJ starter solenoid. (see .pdf attached)
Attached Files
File Type: pdf 87 YJ NSS.pdf (118.3 KB, 27 views)
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