LC-1 install with DIYPNP on NB using stock O2 plug? - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


MEGAsquirt A place to collectively sort out this megasquirt gizmo

Reply
 
 
 
LinkBack Thread Tools
Old 05-13-2016, 02:22 PM   #1
Junior Member
Thread Starter
 
Join Date: Dec 2008
Location: Ft. Lauderdale, FL
Posts: 273
Total Cats: 7
Default LC-1 install with DIYPNP on NB using stock O2 plug?

I am in the early stages of swapping a VVT motor into my '99. Part of this swap will be a DIYPNP and VVTuner (Same type of set-up I run on the track car). When I go to wire in the LC-1, can I use the factory O2 plug to provide power/ground to the LC-1 and signal to the DIYPNP? Looking at the wiring diagrams for the '99, it looks like there is a dedicated heater circuit for both +12 and ground, a shielded sensor ground and a signal back to the stock ECU. Has anyone wired up an apadter harness using the existing front O2 sensor plug and just plug that to the factory harness? My plan is going to be to power the LC-1 through the heater +12 wire, ground the LC-1 through the shielded ground and signal through the factory O2 signal wire. Anyone see any potential issues?
MX5RACER is offline   Reply With Quote
Old 05-14-2016, 12:30 AM   #2
Junior Member
iTrader: (1)
 
Join Date: Dec 2015
Location: Brisbane
Posts: 219
Total Cats: -16
Default

Wideband. Don't be silly.
adryargument is offline   Reply With Quote
Old 05-14-2016, 09:31 AM   #3
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,899
Total Cats: 1,792
Default

Quote:
Originally Posted by MX5RACER View Post
I am in the early stages of swapping a VVT motor into my '99. Part of this swap will be a DIYPNP and VVTuner (Same type of set-up I run on the track car). When I go to wire in the LC-1, can I use the factory O2 plug to provide power/ground to the LC-1 and signal to the DIYPNP? Looking at the wiring diagrams for the '99, it looks like there is a dedicated heater circuit for both +12 and ground, a shielded sensor ground and a signal back to the stock ECU. Has anyone wired up an apadter harness using the existing front O2 sensor plug and just plug that to the factory harness? My plan is going to be to power the LC-1 through the heater +12 wire, ground the LC-1 through the shielded ground and signal through the factory O2 signal wire. Anyone see any potential issues?
I hate the idea of wiring and installing an LC1 controller in the engine bay.
Braineack is offline   Reply With Quote
Old 05-15-2016, 06:27 PM   #4
Junior Member
Thread Starter
 
Join Date: Dec 2008
Location: Ft. Lauderdale, FL
Posts: 273
Total Cats: 7
Default

Quote:
Originally Posted by adryargument View Post
Wideband. Don't be silly.
Thanks for the valuable comment.
MX5RACER is offline   Reply With Quote
Old 05-15-2016, 06:29 PM   #5
Junior Member
Thread Starter
 
Join Date: Dec 2008
Location: Ft. Lauderdale, FL
Posts: 273
Total Cats: 7
Default

Quote:
Originally Posted by Braineack View Post
I hate the idea of wiring and installing an LC1 controller in the engine bay.
The way the LC-1 connects to the sensor, where else can you mount it? Aside from not liking the placement, do you see any issues with my plan?
MX5RACER is offline   Reply With Quote
Old 05-15-2016, 09:14 PM   #6
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,899
Total Cats: 1,792
Default

I like wiring off the ecu loom, running sensor down through shift boot. If you need length, they sell a sensor extention loom. The controller can hang out safely under the radio.
Braineack is offline   Reply With Quote
Old 05-18-2016, 02:13 PM   #7
Newb
iTrader: (1)
 
Join Date: Jul 2014
Posts: 15
Total Cats: 1
Default

I lopped off the connector of my stock O2 sensor and put it on my LC2. The control module is mounted under the dash and gives easy access for the serial port and calibration light. The heater circuit works great to power the sensor, but I remember having to probe the connector to figure out the polarity of the heater power wires. I don't remember why, maybe I was lazy in reading the diagram.
hobbes567 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
MS3X VVT - no crank and cam signal issue coma MEGAsquirt 35 05-12-2016 02:45 PM
DIYPNP wbo2 wiring question (0v-5v) wire. 92 1.6 honeydesean MEGAsquirt 2 10-11-2015 12:07 PM
DIYPNP 1994 No spark, No RPM signal. SerGundorf MEGAsquirt 14 08-01-2015 02:04 PM
LC-1 Error 5 issues MX5RACER MEGAsquirt 0 04-01-2010 11:01 AM
LC-1 signal distortion in MS pnp 9495 yanik MEGAsquirt 3 04-23-2009 03:41 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 06:59 PM.