4.3 wiring, what all is required?
01-12-2014, 06:15 PM
#21
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Great! I got rid of the transmission wiring. There are about 4 square connectors that were about 2ft from the ecu. What are these for? Just want to Mke sure before I get rid of them. Also, I has one upstream o2 sensor. The exhaust was not factory and the trans harness was cut prior to be pulling the engine. Are the obd1 systems only one o2 sensor?
01-15-2014, 10:04 AM
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I think one is fuel pump , air flow valve in top of motor under the vortex cover and not sure about the other . If the wiring harness plugs into it then you need it . I don't have my Manual with me . You really need to buy one for yor doner truck and factory electrical manual for your Toyota .you are going to need them anyway to hook up gauges and stuff . I bought them form eBay for about $30 each .
Last edited by james92toy; 01-15-2014 at 12:00 PM.
01-15-2014, 06:23 PM
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Great to have someone else on bored! Technically I have already started. Been gathering all necessary parts. Pulled my stock engine and trans. While motor was on the stand I changed a few seals, added both oil pressure sensors and fuel line fittings. All thats left is the toyota coolant temp sensor. I plan to make a write up once its complete. Taking lots of pictures of everything. Maybe we can tackle this wiring thing together.
01-16-2014, 04:07 AM
#29
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Great to have someone else on bored! Technically I have already started. Been gathering all necessary parts. Pulled my stock engine and trans. While motor was on the stand I changed a few seals, added both oil pressure sensors and fuel line fittings. All thats left is the toyota coolant temp sensor. I plan to make a write up once its complete. Taking lots of pictures of everything. Maybe we can tackle this wiring thing together.
I have already started a build thread, but there really isnt anything important in there yet. Im doing a 4.3 swap, SAS, and rear leaf swap all at the same time.
08-21-2014, 09:50 AM
#33
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Suspension Question
Hi I'm building up a 95 runner with the 4.3 liter engine. I'm using jeep wagoneer straight axles I think from a 1987. I was wondering what you used and how you set yours up and any recommendations you might have? Nice truck also
I have a 94 4.3 cpi , with stock l460e transmission a 92 4runner , smog legal in ca. I love my 4.3 swap . Lots of power , easy to work on. Gas milage not so good . 12 mpg city 16 hwy.
This is my first auto trans wheeling and i would never go back to stick.
Everything works like stock in my truck and looks like it came from the factory with a 4.3.
Are you trying to be smog legal ?
The cpi's mostly came with automatics so a stick might make it harder to smog cause you would have to get the computer ref lashed .
1992 to 1995 1/2 cpi's have a sliver computer under the dash. These are obi 1
smog. Also you can tell because the distributor wires will point up vertically. Less wiring . Its what all after market places sell harness for. This is the one you want.
After 1995 1/2 they went to obd2. more wires. Couple more sensors.
They have a black computer on pass fender , distributor wires point up horizontally .
You can make a 1995 1/2 into an obd1 by swapping out distributor , computer and harness , the motor is the same.
A tbi 4.3 is about 160 hp.
A cpi 4.3 is 195 hp , better heads and cam.
Wiring.
You could go through stock harness and cut out what you don't need , like wires that go to auto transmission.
I went with a "painless harness" about $400. Very simple to hook up.
You need a factory toyota wiring manual "get one from ebay about $30"
and one for your 4.3.
You will splice into your body harness to hook up gauges, very easy.
Temp sensor : buy a stock toy , drill and tap into intake water jacket , wire to body harness .
Oil sensor : cpi computer needs its own , put a tee fitting then screw a toyota in and wire to body harness
Tach : Wire from back of distributor to body harness .
Fuel pump : Wire comes from computer to pump .
DONT THROW AWAY ANYTHING TILL YOUR DONE WITH SWAP.
Here's some pic's
This is my first auto trans wheeling and i would never go back to stick.
Everything works like stock in my truck and looks like it came from the factory with a 4.3.
Are you trying to be smog legal ?
The cpi's mostly came with automatics so a stick might make it harder to smog cause you would have to get the computer ref lashed .
1992 to 1995 1/2 cpi's have a sliver computer under the dash. These are obi 1
smog. Also you can tell because the distributor wires will point up vertically. Less wiring . Its what all after market places sell harness for. This is the one you want.
After 1995 1/2 they went to obd2. more wires. Couple more sensors.
They have a black computer on pass fender , distributor wires point up horizontally .
You can make a 1995 1/2 into an obd1 by swapping out distributor , computer and harness , the motor is the same.
A tbi 4.3 is about 160 hp.
A cpi 4.3 is 195 hp , better heads and cam.
Wiring.
You could go through stock harness and cut out what you don't need , like wires that go to auto transmission.
I went with a "painless harness" about $400. Very simple to hook up.
You need a factory toyota wiring manual "get one from ebay about $30"
and one for your 4.3.
You will splice into your body harness to hook up gauges, very easy.
Temp sensor : buy a stock toy , drill and tap into intake water jacket , wire to body harness .
Oil sensor : cpi computer needs its own , put a tee fitting then screw a toyota in and wire to body harness
Tach : Wire from back of distributor to body harness .
Fuel pump : Wire comes from computer to pump .
DONT THROW AWAY ANYTHING TILL YOUR DONE WITH SWAP.
Here's some pic's
08-21-2014, 04:13 PM
#34
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Thanks . In front i used a Allpro off road front leaf hanger and frame tubes. 4"
allpro springs , trail gear shock tube mounts . rancho rs9ooo shocks . In back
All pro offroad 5" springs 56 long . And spring mounts from ruffstuff . Made my own cross bar above the axle and a little forward on the frame to mount shocks and hang the gas tank to. I also raised the gas tank about 2 ". I have a 1" body lift to help clear stuff. Work good nothing special . If you want any pictures let me know I will pm to you .
allpro springs , trail gear shock tube mounts . rancho rs9ooo shocks . In back
All pro offroad 5" springs 56 long . And spring mounts from ruffstuff . Made my own cross bar above the axle and a little forward on the frame to mount shocks and hang the gas tank to. I also raised the gas tank about 2 ". I have a 1" body lift to help clear stuff. Work good nothing special . If you want any pictures let me know I will pm to you .
Last edited by james92toy; 08-22-2014 at 09:54 AM.
12-01-2014, 06:20 PM
#35
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Thanks . In front i used a Allpro off road front leaf hanger and frame tubes. 4"
allpro springs , trail gear shock tube mounts . rancho rs9ooo shocks . In back
All pro offroad 5" springs 56 long . And spring mounts from ruffstuff . Made my own cross bar above the axle and a little forward on the frame to mount shocks and hang the gas tank to. I also raised the gas tank about 2 ". I have a 1" body lift to help clear stuff. Work good nothing special . If you want any pictures let me know I will pm to you .
allpro springs , trail gear shock tube mounts . rancho rs9ooo shocks . In back
All pro offroad 5" springs 56 long . And spring mounts from ruffstuff . Made my own cross bar above the axle and a little forward on the frame to mount shocks and hang the gas tank to. I also raised the gas tank about 2 ". I have a 1" body lift to help clear stuff. Work good nothing special . If you want any pictures let me know I will pm to you .
12-01-2014, 06:31 PM
#37
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Thanks . Stock distributor and coil . The spark plug wires will plug in vertically on a obd 1 distributor , and horizontally if it's obd2. My alternator is older gm for on board welder .
12-02-2014, 06:27 PM
#38
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Howell told me I'd need to use a obd1 distributor on my obd2cpi motor in order for it to work with there harness. Do you have a build thread on your rig??
12-02-2014, 06:53 PM
#39
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No I don't have a build thread . You can pm me any questions if you want .
Only harnesses I've seen are for obd1. So make your motor obd1. You need silver computer , speed sensor box , distributor , harness . There's a crank sensor on the timing cover you will not be using anymore . My motor was obd2 .
Start looking around for harness coupons, I had a $100 off painless from summit when I bought mine .
Only harnesses I've seen are for obd1. So make your motor obd1. You need silver computer , speed sensor box , distributor , harness . There's a crank sensor on the timing cover you will not be using anymore . My motor was obd2 .
Start looking around for harness coupons, I had a $100 off painless from summit when I bought mine .
12-04-2014, 04:17 PM
#40
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No I don't have a build thread . You can pm me any questions if you want .
Only harnesses I've seen are for obd1. So make your motor obd1. You need silver computer , speed sensor box , distributor , harness . There's a crank sensor on the timing cover you will not be using anymore . My motor was obd2 .
Start looking around for harness coupons, I had a $100 off painless from summit when I bought mine .
Only harnesses I've seen are for obd1. So make your motor obd1. You need silver computer , speed sensor box , distributor , harness . There's a crank sensor on the timing cover you will not be using anymore . My motor was obd2 .
Start looking around for harness coupons, I had a $100 off painless from summit when I bought mine .
