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AMP EFI

MS3Pro PnP Standalone Engine Management System

$1,299.99

SKU: MS3Pro-PNP-9900

In Stock
In Stock
Ships by Sep 12
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The AMP EFI MS3Pro PnP is a plug-and-play standalone engine management system designed for the 1999-2000 USDM Mazda Miata with a manual transmission. It offers easy installation, with an average setup time under one hour, and comes with a pre-loaded base map to help your engine start quickly.

This system provides fully tunable engine control with 16x16 fuel tables and 16x16 ignition tables, along with features like closed-loop idle speed control and air conditioner control. It supports four sequential fuel injector channels and onboard peak and hold drivers for both high and low impedance injectors.
Show original supplier description
The AMP EFI MS3Pro PnP (Model #MSPNPPro-MM9900) is a comprehensive standalone engine management system engineered for the 1999-2000 USDM Mazda Miata models equipped with a manual transmission. A pre-loaded base map is included to facilitate an easier engine start. At its core, the MS3Pro PnP offers advanced tunable engine control capabilities. It features high-resolution tuning with 16x16 fuel tables and 16x16 ignition tables. Additional integrated features include multiple acceleration enrichment strategies, closed-loop idle speed control, air conditioner control, and four sequential fuel injector channels with individual trim tables. The system's onboard peak and hold drivers accommodate both high and low impedance injectors, eliminating the need for an external ballast resistor. It also allows for the removal of the stock airflow meter. The MS3Pro PnP boasts an advanced feature set for precise tuning and enhanced performance. This includes 12x12 Air Fuel Ratio target tables for use with a wideband O2 sensor, VVT support for later VVT motor swaps, and programmable voltage regulator control for NB alternator swaps. For performance enthusiasts, it offers multiple traction control strategies, a built-in 3-step rev limiter/launch control with flat shift and burnout capabilities, real-time barometric correction, and an internal 4-bar MAP sensor capable of reading up to 44 PSI of boost. Overboost protection, closed-loop boost control (requires EBC solenoid kit), rally-style anti-lag, and water injection control (on/off or variable) are also included. For advanced diagnostics and custom setups, it features a knock sensor input with adjustable sensitivity and windowing, a table switching input for on-the-fly map changes, flex fuel sensor input for E85/gasoline switching, and a CANBus connector for interconnectivity with other MegaSquirt-compatible devices. Included in the package are the Miata 9900 MS3Pro PnP ECU, a 6-foot RS232 serial tuning cable (USB adapter sold separately), a USB memory stick with tuning software and documentation, a 6-foot vacuum hose for the MAP signal with a T-fitting, four mounting screws, and a registered version of TunerStudio and MegaLog viewer. The product is subject to California Proposition 65 warning regarding cancer and reproductive harm.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandAMP EFI
Part NumberMS3Pro-PNP-9900
CategoryIgnitions and Electrical

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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