Standard Edition $595	Professional Edition $1895
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The Complete MEFI ECM Solution - Tuning, Data Logging, Diagnostics for MEFI1, MEFI2, MEFI3, MEFI4, 4A, 4B

Our Marine EFI (MEFI) Scan & Tune system allows you to download the internal MEFI programming to your PC or laptop with our MEFIburn program, change the operating parameters of the controller, and then reprogram the controller with your modifications. It also allows you to view all of your sensor systems in real time and log the data for later viewing, in addition to seeing which malfunction trouble codes, MALF's, have been set, and clearing them. Some competing systems will only allow you to monitor the performance of your boat or off-road vehicle's engine controller and reset engine trouble codes. Other costly packages force you to use an inconvenient hardware dongle or key, and only work with a few versions of the MEFI ECM series. Those days are over!

• Marine - MerCruiser, Volvo Penta, Crusader, Indmar, many boating applications
• Off-Road - Sand rails, race cars, industrial engines, and more
• Crate Engines - Ramjet 502, Ramjet 350, LT1, LS1, LS2, LS6, LS7, Ecotec

• A USB - MEFI Interface Cable. This has the 10-pin Delphi MEFI connector on one end and plugs into your computer's USB port on the other end. All of the electronics are contained within the cable itself. The cable is about 3m (10 ft) long, giving you plenty of distance between your engine and where you will be placing your laptop. 6-foot and 15-foot USB extender cables are available
• A CD-ROM containing all the software you need to do both monitoring and tuning of your controller.
• A Step-By-Step set of instructions that will show you how to get up and running quickly.

The following table will help you determine which MEFI controller you have. On the bottom of the controller is a sticker with a part number. The GM part numbers and MEFI ECM's are listed here:

GM Part No. MEFI Type 16159919 MEFI-1 16189069 MEFI-1 16220371 MEFI-1 16234539 MEFI-1* 16210729 MEFI-2 16237009 MEFI-3 16237019 CEFI-3 16236999 MEFI-3* 12489488 MEFI-3 12489493 MEFI-3 12569494 MEFI-4 12575479 MEFI-4a 88962717 MEFI-4a 88962718 MEFI-4a 12584052 MEFI-4b 12597744 MEFI-5 12607802 MEFI-5a

MEFI 1 and MEFI 2 packaging MEFI 3 and MEFI 4 packaging

*Used by MerCruiser

Monitor your MEFI 1, MEFI 2, MEFI 3,
MEFI 4,MEFI 4A, MEFI 4B system

Scanner Pro is used for doing engine monitoring, data logging, and malfunction trouble code reading. We have developed MEFI 1, MEFI 2, MEFI 3, and MEFI 4 definition files that allow you to take full advantage of the features that Scanner Pro has to offer.

Our custom-designed interface cable allows you to do real-time monitoring and data logging of the MEFI engine controller.

MEFI Scan & Tune supports the following controllers:

Download and Burn

A critical step in the tuning process is the ability to upload and download programs between your MEFI controller and your PC or laptop. We have developed custom software, the MEFIburn program, specifically designed for MEFI controllers to do that data transfer. This MEFIburn software can do both the download and critical upload (programming) functions. It works with the common automotive .bin file format, the Motorola S-record .ptp file format, as well as the Ingenius Pro .cal, .asm, and .umi file formats. The MEFIburn program has the capability to convert files between all 5 formats, so regardless of the calibration or tuning file type you have, you can use it.

The MEFIburn program allows you to enter a password on password protected calibrations, if you know the password, or if you do not know the password, completely blank out the internal memory of the MEFI controller and upload a fresh base tune to start your custom tuning process. The MEFIburn program also allows you to clear all Malfunction Diagnostic Trouble Codes with the click of a button. For complete details and screen shots, see our MEFIburn page

Tune Your MEFI Controller

TunerPro is a free, donate-if-you-like-it tuning platform aimed at making tuning easier and cheaper. TunerPro started life as GMECM Edit, and debuted in early March of 2003. TunerPro has since grown into a very robust tuning tool.

We have developed two versions of control definitions to work with TunerPro, the Standard Edition and the Professional Edition. There are hundreds of parameters that can be tuned in a MEFI controller, however, only a handful are typically used. We have selected this typical parameter set for the MEFI Scan and Tune Standard Edition. The full parameter set is overwhelming for all but professional tuning applications, so for those pro users, we have MEFI Scan & Tune Professional Edition. For complete details and screen shots of TunerPro, see our TunerPro page and Mark Mansur's TunerPro.net webpage

Monitor and Data Log Your MEFI Controller

ScannerPro is a free, donate-if-you-like-it monitoring platform also done by Mark Mansur. Mark has done a great job of creating a simple to use and very detailed monitoring and data logging framework

We have developed 4 versions of control definitions to work with ScannerPro, MEFI-1, MEFI-2, MEFI-3, and MEFI-4. There are many parameters, flags, warnings, and MALF trouble codes to be monitored and logged for each generation of the MEFI ECM. For complete details and screen shots of ScannerPro, see our ScannerPro page and Mark Mansur's ScannerPro.net webpage

Ramjet 350 and Ramjet 502 Reprogramming

We have the capability to reprogram the calibration and tune of your Ram Jet 350 or Ram Jet 502 MEFI ECM. We do this Ramjet tuning on a mail in basis, and charge $200 for basic tuning. Don't suffer with a poor running Ramjet any longer!

Compare features, price, & MEFI types covered: