Variable tps mod for 1.6L - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


E-Manage Post your questions about greddy e-manage installation and tuning here.

Reply
 
 
 
LinkBack Thread Tools
Old 10-01-2007, 12:40 PM   #1
Newb
Thread Starter
 
Join Date: Mar 2006
Location: 51st State
Posts: 29
Total Cats: 0
Default Variable tps mod for 1.6L

Hi all, just thought I'd post this in case its of any use to anyone with a 1.6 tps (on/off type) who is looking to upgrade to a variable tps .
This works perfect, and is fairly easy to do.
Variable tps is needed for e-manage ultimate features such as launch control and autotune.
For this mini-project, I've used a 1.6 auto-transmission throttle body, with variable throttle position sensor, part number B6S8-18-911
These sensors can be found on e-bay, and are quite easy to find.

Replacing the throttle body was a matter of convenience for me since I had one lying about, but it may well be possible to replace the stock sensor with the variable type with no hassle. Either way, the 1.6 auto TB was a straight swap, no agro.
My biggest worry was the wiring side of things, but that was no hassle actually. This new tps has an inbuilt switch to feed the stock ecu with a 5V signal at idle. Most other variable tps's don't have this, and so can't be used.

The wiring is as follows:
Stock 1.6 tps sensor has 3 wires - red, green & black-lightgreen.
New variable tps sensor has 4 wires - red, red-black, black-lightgreen, lightgreen-red.

To fit the new sensor, solder red to red, and black-lightgreen to black-lightgreen.
Solder green (stock sensor) to lightgreen-red (replacement sensor), and red-black (replacement sensor) is the tps signal.

Thats it !

BTW, red is the 5V signal which the stock ecu requires at idle (or 0 throttle position), 5V drops to 0V at any other throttle position.



The blue wire is for my tps input to the EMU.



old throttle body
100_2232.jpg

Last edited by tritium; 10-01-2007 at 12:51 PM.
tritium is offline   Reply With Quote
Old 10-01-2007, 09:41 PM   #2
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,526
Total Cats: 0
Default

not trying to diss or anything but that wiring looks pretty bad i hope you dont expect that to be final or anything. I personally try to use unshielded crimps and shrink tubing for my wiring, and I often use that corrugated tubing wrapped with electrical tape to protect it all as well.
akaryrye is offline   Reply With Quote
Old 10-02-2007, 04:02 AM   #3
Newb
Thread Starter
 
Join Date: Mar 2006
Location: 51st State
Posts: 29
Total Cats: 0
Default

lol, the pictures were taken just after soldering to show you the wiring colours. That isn't how it looks now obviously or the wires would be shorting out
tritium is offline   Reply With Quote
Old 10-02-2007, 04:12 AM   #4
Elite Member
iTrader: (5)
 
akaryrye's Avatar
 
Join Date: Jul 2006
Location: Central California
Posts: 2,526
Total Cats: 0
Default

why do you solder em twisted together like that? Do you solder and cap with wirenuts or something? I have always stripped each end, interlock the strands and maybe, but not always twist em a bit together and cover up with shrink tubing. Comes out real clean like that, but clean is mainly just to look nice and whenever my projects can look nice for little to no extra cost, i try to take the time to do it.
akaryrye is offline   Reply With Quote
Old 10-02-2007, 01:07 PM   #5
Newb
Thread Starter
 
Join Date: Mar 2006
Location: 51st State
Posts: 29
Total Cats: 0
Default

Quote:
Originally Posted by akaryrye View Post
why do you solder em twisted together like that?
Actually, they were soldered again and carefully trimmed to prevent strands poking through the insulation. Prior to takin those 2 photographs, the 4 connections were soldered just to hold the wires together for the camera. The lower harness is under tension, you can see it does not want to sit up and pose for the camera.

Quote:
Originally Posted by akaryrye View Post
I have always stripped each end, interlock the strands and maybe, but not always twist em a bit together and cover up with shrink tubing.
Works great on a work bench.

Quote:
Originally Posted by akaryrye View Post
Comes out real clean like that, but clean is mainly just to look nice and whenever my projects can look nice for little to no extra cost, i try to take the time to do it.
I started this thread to perhaps save people from going through the hassle & uncertainty I went through to do this, I spent some time carrying out electrical tests before I went pulling off my old throttle body, and with the boost pipes and limited access, it was a pain in the backside so I didn't want to have to pull it all off again if it didn't work.
The above pictures indicate where to connect the wires, thats all. Not how to crimp, paint, heatshrink, polish, bling up, etc - there are other forums for that.
But point taken; it doesn't really take pictures to indicate connect red to red, black-lg to black-lg, etc.


Here's a picture from earlier today, still not quite finished though :
tritium is offline   Reply With Quote
Old 10-10-2007, 02:51 AM   #6
Junior Member
 
Join Date: Oct 2006
Posts: 257
Total Cats: 0
Default

thanks for the information bud. im sure it'll b useful to me in the future = )
shinobix is offline   Reply With Quote
Old 10-14-2007, 12:46 AM   #7
Newb
Thread Starter
 
Join Date: Mar 2006
Location: 51st State
Posts: 29
Total Cats: 0
Default

No problem pal
tritium is offline   Reply With Quote
Old 01-31-2008, 01:29 AM   #8
Junior Member
 
Join Date: Feb 2007
Location: Austria
Posts: 47
Total Cats: 0
Default

Does anyone know the correct Connectors for the tps??? Im also connecting an auto TPS in my 91 NA, but my wiring wouldn`t be functional. How are the right wiring???????

Its very important for me, can anybody help me please?

How are the originale Pins (original Colors) on the new 4Pins Connector from in correct order from Top to Down???

I Have: From the Top - 1. orig. greenwhite
2. new var. TPS Signal to EMU
3. orig. blackgreen
4. orig. red

I get by the new TPS SIgnal for my EMU by 0% throttle 6,5 V and bei 100% throttle 5,9 V .... WHATS WRONG????

Jonny
jonny is offline   Reply With Quote
Old 01-31-2008, 02:55 PM   #9
Junior Member
iTrader: (2)
 
Join Date: Nov 2006
Location: N/A
Posts: 360
Total Cats: 0
Default

An even cheaper and easier mod is to use the signal from a gm 1 bar map sensor. I ran mine this way when i had an safc on my turbo escort.
mikeflys1 is offline   Reply With Quote
Old 01-31-2008, 04:25 PM   #10
Elite Member
iTrader: (24)
 
Join Date: Jul 2007
Location: Cypress, TX
Posts: 3,778
Total Cats: 35
Default

Quote:
Originally Posted by mikeflys1 View Post
An even cheaper and easier mod is to use the signal from a gm 1 bar map sensor. I ran mine this way when i had an safc on my turbo escort.
That's how I tune. I hooked the map sensor up to the tps input on emanage blue and use the airflow adjustment map. You gotta calibrate it though.
Bryce is offline   Reply With Quote
Old 06-19-2011, 09:03 AM   #11
Newb
 
Join Date: Mar 2009
Location: Germany
Posts: 17
Total Cats: 0
Default

I just started this mod with the Automatic TB. But when i Check the signals (wired up), there is no vTps Signal that i can use.

BTW. RED is 12V for idle and LT GRN-WHT is 5V for WOT both 0V at their idle or WOT positions as they should get switched to BLK-LT-GRN (0V GND).
So far for the original 3-Pin switch-type TPS.

The automatic 4-Pin TPS doesnt get you the right signals when connected.
If you test it unconnected, it seems to have 2 switches and a potentiometer but all pins where connected to each other internal by some resistors. So the output when connected to 12v, 5v and gnd is not equally to the 3-pin switch type TPS.
e.g you dont get 0V at idle. its somewhere near 2,5V and so on.

It seemed so easy but its very frustrating...



So now my question... Will a Map sensor give me a reliable signal to go with on a NA setup?

All i want is to set up the airflow Map to prevent the ECU from getting so ritch at higher revs. (gets up to A/F 9.5 above 7000)

Thanks Michael
Speedwolf is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Raleigh: Fiberglass headlight scope, 1.6L ECU, AFM, Hardtop latches, more bigmackloud Miata parts for sale/trade 13 09-22-2017 01:34 PM
Going back to stock. Need some 1.6 parts. Trent WTB 2 10-01-2015 01:15 PM
Time to start learning and play with tuning The Gleas MEGAsquirt 3 10-01-2015 10:30 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 06:31 AM.