Spartan Wide Band install

Flatfoot

Active Member
Aug 18, 2017
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Milton, Fl
Can somebody check my wiring and make sure I’m not gonna burn something up. Wiring up my wide and putting my PiMPxs in. Read over another thread and decided to use the old O2 sensor and cut the connector off. Using the veryuseful.com wiring schematic I wired the connector I cut off to the spartan wideband controller as follows. Red wire from the controller to the ignition run circuit. The green wire from controller to pin 29 on connector. The white and black wire from the controller I twisted together and connected to the ground on the connector plug. Is this right?
 

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beyondEOD

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Nov 23, 2019
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No you have tied the sensor ground and heater ground together. Not good. Sensor will not be accurate.

Black Electronics Ground = Ground where interfacing device is grounded
White Heater Ground = Ground to chassis or engine block
 

BugsOli

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Jul 1, 2013
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Hello mate, I'm interested in knowing how you did your install as I'm going the same route as you, which is using the driver side original O2 sensor bung to install my Spartan.
Do you have pictures on how you installed your wideband and its controller please? My car is an 87 and I will be using a MicroSquirt, which is equivalent to the MegaSquirt 2.
Thanks a lot!
 

beyondEOD

Member
Nov 23, 2019
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Indiana
One way would be to use a relay. Where it says ms3 fuel sub in your micro fuel pin. This is a very protective circuit. You can do without the 1 amp fuel on the trigger and possibly the flyback diode but I like safe.

For your power ground on the spartan take it to the power ground at the ms or to the block/chassis.

The sensor ground has to go back to the ms on the sensor ground input for the best accuracy.


There is a product in development by someone on here that would also make this super easy solid state.

WidebandRelay.PNG
 

BugsOli

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Jul 1, 2013
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Thanks bro! But if I want to do it simple and fast, couldn't I do the same as @Flatfoot? Meaning I use the original O2 bung and splice the Spartan brown wire to the OEM narrowband circuit (driver side for example but don't remember the color, black?).
Since my MS is not yet installed (I still have the A9M in my car), I would like to "simulate" the narrowband signal so the ECU doesn't throw codes...
When I install the MS I won't need the narrow band anyway but I would prefer to use the original harness if possible.

The MicroSquirt has an input wire (pink) for the O2 WB.
 

beyondEOD

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Nov 23, 2019
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Indiana
Yes you can use the factory harness. Just make sure to separate your sensor ground. I'd have to look at how the factory does it to be sure if it's good to go. Look over a wiring diagram and see if the power and sensor ground are separate. If they are not you can just bolt down the power ground to the motor mount right near the sensor.
 
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DemonGT

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May 24, 2002
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Sparta,WI
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Just got my Pimpxs today with the spartan WB. Was wondering how exactly how everyone wired up the WB? Where did you hook into for each wire?

Was hoping someone had a good video install of one or write up with pics. I thought enough people have installed them id just copy how they
did theres with running wires etc.
 
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DemonGT

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May 24, 2002
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the pimp has instructions for the spartan WB installation on the usb drive, its in the manual
Thanks for the info i had not even thought of that. I was thinking the USB just had the base tune on it and
tuner studio. Ill be sure to read it over and report back with questions i have which im sure ill have. I struggle
with wiring. I can put just about any part into my car myself but when it comes to wiring i hate it...one of the main
reasons iv stuck with the stock fan/clutch instead of going electric fan.

Planning on buying and installing the DD EFI dash this fall/winter. Should have plenty of questions to ask/post
when i do that. lol
 
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