Ford EDIS
The Ford EDIS or Electronic Distributorless Ignition System is a computer-controlled ignition system developed by Ford that uses an ignition coil for each pair of cylinders (wasted spark). All the coils are placed in a single module called a coilpack.
Vehicles with EDIS
Ford used the EDIS module on a number of vehicles from 1988 to 199X.
EDIS-4
The EDIS-4 module is used on the following vehicles equipped with the Ford HCS engine, and the 1.9-liter straight-4 Ford CVH engine, between 1988 and 1993:
- Ford Escort / Mercury Tracer
- Ford Fiesta (Europe)
- Ford Escort (Europe)
- Ford Sierra (Europe)
- Ford Scorpio (Europe)
- Ford Mondeo (Europe)
This system was also used on the 1995–2001 4-cylinder Ford Rangers and 1995–2001 Mazda B2300, B2500. But was incorporated into the EEC-V ECU, so there is no external module.
EDIS-6
The EDIS-6 module is used on the following vehicles equipped with the 4.0L Ford Cologne V6 engine and 3.8L Ford Essex V6 engine between 1990 and 1997:
- Ford Ranger / Mazda B-Series
- Ford Explorer / Mazda Navajo
- Ford Aerostar
- Ford Mustang (3.8L V6)
- Ford Thunderbird Supercoupe
- Ford Taurus SHO V6 (1989–1995)
- Ford Windstar
The European Ford Scorpio 2.9 V6 24V Cosworth also uses the EDIS-6 module.
EDIS-8
The EDIS-8 module is used on the following vehicles equipped with the 4.6-liter V-8 Ford Modular engine between 1990 and 1997:
- Lincoln Town Car, Mark VIII
- Ford Crown Victoria / Mercury Grand Marquis
- Ford Thunderbird / Mercury Cougar
- Ford Mustang
The EDIS-8 Module was also used in Some later 5.0L Ford Explorers until around 2002
Aftermarket use in non-Ford vehicles
The EDIS system's relative simplicity, in particular the fact it does not require a cam sensor, makes it a popular choice for custom car builders and classic car owners looking to retrofit a modern ignition system to their vehicle. The crankshaft-mounted trigger wheel, VR sensor, EDIS Module and an ignition control computer can all be easily fitted to most older engines that originally used a traditional distributor for ignition.
See also
References
- [http://patft.uspto.gov/netacgi/nph-Parser?u=%2Fnetahtml%2Fsrchnum.htm&Sect1=PTO1&Sect2=HITOFF&p=1&r=1&l=50&f=G&d=PALL&s1=4661778.PN.&OS=PN/4661778&RS=PN/4661778 US Patent Number 4,661,778: Ignition diagnostic monitor]
- [http://patft.uspto.gov/netacgi/nph-Parser?u=%2Fnetahtml%2Fsrchnum.htm&Sect1=PTO1&Sect2=HITOFF&p=1&r=1&l=50&f=G&d=PALL&s1=4922874.PN.&OS=PN/4922874&RS=PN/4922874 US Patent Number 4,922,874: Automobile electronic control modules communicating by pulse width modulated signals]
- [http://patft.uspto.gov/netacgi/nph-Parser?u=%2Fnetahtml%2Fsrchnum.htm&Sect1=PTO1&Sect2=HITOFF&p=1&r=1&l=50&f=G&d=PALL&s1=5014676.PN.&OS=PN/5014676&RS=PN/5014676 US Patent Number 5,014,676: Ignition system with repetitive sparks]
- [http://www.dainst.com/info/edis/edis.html Ford EDIS technical information]
- [https://web.archive.org/web/20070426014229/http://megasquirt.sourceforge.net/extra/edis-whatyouneed.html MegasquirtnSpark-extra EDIS mode]
- US Patent Number 6,115,665: Memory Efficient Computer System And Method For Controlling An Automotive Ignition System
- [https://web.archive.org/web/20140714152238/http://etypeuk.com/forum/viewtopic.php?t=437 E-Type UK EDIS/Megajolt Ignition Support Thread]