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docs: update boards/MX5_PNP

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Administrator 2020-01-08 01:53:08 +00:00 committed by Josh Stewart
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boards/MX5_PNP.md
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@ -2,7 +2,7 @@
title: Miata/MX5 89-95 NA6 PNP
description: Plug and Play board for the NA Miata/MX5 model years '89 through to early '95
published: true
date: 2020-01-07T05:09:42.847Z
date: 2020-01-08T01:53:01.609Z
tags: boards, PNP
---
@ -13,10 +13,11 @@ The Speeduino Miata / MX5 Plug N Play (PNP) box is designed for easy installatio
The stock ECU for these vehicles have a 2 plug loom connection and look like the below:
![OEM_ECU.png](/img/MX5/OEM_ECU.png =70%x){.align-center}
![OEM_ECU.png](/img/MX5/OEM_ECU.png =600x){.align-center}
> **WARNING:** Note that some changes to the stock hardware configuration are required with this unit. In particular, please see below in the fuel pump section for details that must be understood prior to starting
{.is-danger}
> **WARNING:** In particular, please see below in the fuel pump section for details that must be understood prior to starting
{.is-warning}
Hardware requirements
@ -32,7 +33,7 @@ For a load reference, it is strongly recommended to run a manifold pressure line
The 1.6L cars typically come with a suitable MAP port near the throttle body that is capped off in stock form and is generally the easiest place to take the manifold pressure reference.
![MAP_orig.png](/img/MX5/MAP_orig.png =70%x){.align-center}
![MAP_orig.png](/img/MX5/MAP_orig.png =600x){.align-center}
5mm or 6mm vacuum hose should be used and there are multiple original holes in the firewall where this can be run.
@ -40,7 +41,7 @@ The 1.6L cars typically come with a suitable MAP port near the throttle body tha
Manual NA6s come with a switch only TPS that provides limited feedback to the ECU. It is highly recommended to replace this with a Variable TPS (VTPS) that provides a signal indicating the current throttle position. The original wiring can be used with any 3 wire VTPS
![TPS_wiring.png](/img/MX5/TPS_wiring.png =70%x){.align-center}
![TPS_wiring.png](/img/MX5/TPS_wiring.png =600x){.align-center}
> **Note:** If a VTPS is **NOT** being fitted, the stock TPS should be disconnected and a 1k resistor placed between the signal line and ground to prevent erratic acceleration enrichment at full throttle.
{.is-warning}
@ -52,7 +53,7 @@ In the stock configuration, inlet air temperature is provided by a sensor in the
The 2 wires from this sensor can be pinned directly into the AFM connector on pins 1 and 6 (It does not matter which wire goes to which pin):
![IAT_connector.png](/img/MX5/IAT_connector.png =70%x){.align-center}
![IAT_connector.png](/img/MX5/IAT_connector.png =600x){.align-center}
### Wideband O2 Sensor
@ -66,7 +67,7 @@ The stock ECU does not perform any fuel pump control as this is taken care of by
The fuse to be removed is found in the engine bay fuse block:
![ST_SIG_fuse.png](/img/MX5/ST_SIG_fuse.png =70%x){.align-center}
![ST_SIG_fuse.png](/img/MX5/ST_SIG_fuse.png =600x){.align-center}
#### Alternative control methods
@ -74,7 +75,7 @@ If the above method of fuel pump control is either not desirable or not availabl
To do this, a jumper wire is required on the AFM connector per the below:
![AFM_fuel_pump.png](/img/MX5/AFM_fuel_pump.png =70%x){.align-center}
![AFM_fuel_pump.png](/img/MX5/AFM_fuel_pump.png =600x){.align-center}
Once the above jumper is in place, the fuel pump pin in TunerStudio should be set to A9.
@ -96,4 +97,4 @@ The stock sensors can use preset calibrations within TunerStudio. The following
**Stock Coolant Sensor (CLT)** - RX-7_CLT(S4 & S5)
**Stock inlet air sensor (IAT)** - RX-7_AFM(S5 in AFM)
![sensor_calibrations.PNG](/img/MX5/sensor_calibrations.PNG){.align-center}
![sensor_calibrations.PNG](/img/MX5/sensor_calibrations.PNG =500x){.align-center}