EFI - Electronic Fuel Injection Swap
by Michael Decipha Ponthieux
Last Updated: 2017-10-18
This applies to all engines that are capable of operating with a ford ignition system.
Note: EDIS setups SHOULD have a cam sensor installed for proper engine operation for every startup.
Which ECU ?
It is highly recommend to ONLY run EDIS ignition when performing fuel injection swaps utilizing an EEC-V.
Although older EEC-IV's support EDIS with the additional of an EDIS module, the 96+ EEC-V's do not require an external EDIS Module.
EDIS SWAP INFORMATION
|EEC-V||2003-2004||Crown Vic / Maurauder / Marquis / Town Car / Continential||Recommended for EDIS swaps using Coil on Plugs, Can also be used with 4R70W trans swaps. 4R100 swaps require a 4R100 ecu from a 99-04 F150 truck (not f250.)
|EEC-IV||1989-1995||Foxbody & SN94-95** Mustang||Can be used for EDIS swaps as well but is not recommended, requires the use of an external EDIS module equipped on 91-94 EEC-IV 4.6L lincolns and crown vic / grand marquis. It goes
without saying, cut the plugs and take them too so you can plug in to them.
You will need:
It will be necessary to run new fuel lines (feed & return) to the fuel tank in some applications. In these applications, I recommend mounting the fuel pressure
regulator near the fuel tank so you only have to run one line from the regulator up to the rails.
|ECU|| w/ Wiring Harness, 2003-2004 Luxury Sedan engine harness is most ideal usually.
|Ignition Coils||coil on plugs preferably from the vehicle you snatch the ecu and harness from
|Spark Plug Wires||GM LS based engine Coil near Plug wireset
|Lower Intake Manifold Complete|| w/ Thermostat Housing, ACT (if applicable), etc... only needed if swapping from Carb setup. A carb to t/b adapter will suffice as well.
|Upper Plenum||If using the carb to t/b elbow, you will have to fab in an ECT sensor into your lower manifold.
|Throttle Body|| w/ TPS and IAC valve; the iac valve can be remote mounted if need be using SHORT 5/8" hose. Throttle cable will have to be fabbed.
|MAF Sensor|| w/ housing, the sensor itself used in a different housing will crete a NEW meter.
|Fuel Rail|| w/ Fuel Pressure Regulator, recommended to utilize the fuel rail pressure sensor as stock equipped from donor.
|Fuel Injectors||Siemens Deka 80s are recommended for most all setups
|Fuel Pump||See PRE-TUNE INFORMATION for more details
A VR Edis crank trigger will need to be fabricated to the timing cover as well as a 35 tooth (36-1) reluctor
wheel mounted to the rear of the harmonic balancer. A cam sensor will need to be fabricated for sequential fire.
SBF Distributor --> EDIS Swap Parts Needed
|5.0L 97-01 Explorer - Timing Cover, reluctor wheel, crank trigger, cam sensor and cam synchronizer stalk
|for 302 based engine, use the cam sensor and cam sensor synchronizer stalk from the 99-01 explorer.
|for 351 based engines, you will need to locate a 99-04 v6 mustang and remove the cam sensor and cam synchronizer stalk
| on 351 based engines, the bottom half of the v6 stalk will need to be mated to the upper half of the v8 stalk.
Minimum Sensors/Wiring Required
Complete ECU pinout information is available HERE
|Description||89-93 EEC-IV||94-95 EEC-IV||96 EEC-V||
|+ Battery Power|| Pin # 1||Pin # 1||Pin # 55
|- Ground||Pin # 20, 40, 60||Pin # 20, 40, 60||Pin # 24, 25, 51, 76, 77, 103
|- Fuel Pump||Pin # 22||Pin # 22||Pin # 80
|+ Ignition Switch||Pin # 37, 57||Pin # 37, 57||Pin # 71, 97
|MAF RETURN||ALREADY WIRED IN HARNESS
|ECT||ALREADY WIRED IN HARNESS
|INJECTORS||ALREADY WIRED IN HARNESS
|IAC||ALREADY WIRED IN HARNESS
|ACT||ALREADY WIRED IN HARNESS
|VREF||ALREADY WIRED IN HARNESS
|SPOUT||ALREADY WIRED IN HARNESS
|SIGRET||ALREADY WIRED IN HARNESS***
|TPS||ALREADY WIRED IN HARNESS
|MAF 5v||ALREADY WIRED IN HARNESS
|PIP||ALREADY WIRED IN HARNESS
|Hego 1 - Passenger Side Front||HIGHLY RECOMMENDED
|Hego 2 - Driver Side Front||HIGHLY RECOMMENDED
|-Signal Return||***HIGHLY RECOMMENDED TO TAP TO GROUND (DO NOT CUT)
|Hego Ground (foxbody ecu only)||WIRE TO GROUND
OBD-II Port Wiring
Although the OBD-II port isn't required, it is nice to have and is very simple to wire up. The following wiring diagram is also to be used for
wiring bench flashing stations as well.
Startup / Tuning - Base Tunes
Base tunes can be downloaded from the HOMEPAGE and include detailed step-by-step
how-to's for initial fire up. Write-ups are also accessible from the homepage for details and specifics for dialing in your tune and fine tuning there after.
However, if you find yourself here seeking knowledge you may very well factor in purchasing a custom tune REMOTE TUNING as its always quite involved.
The 94+ ecu's can control AODE/4R70W transmission as well if you so choose to swap one of those transmission in as well.
The 89-93 mustang ecu cannot control an ELECTRONICALLY COMPUTER CONTROLLED AUTOMATIC TRANSMISSION.
Mechanical automatic transmissions such as an AOD is basically the same computer wise as a manual transmission as well
as any other automatic transmission that does not get shifted by the ecu and requires no ecu control for operation.
Keep in mind, the 94-95 mustang ecu requires a 1 ohm (EEC-IV) tcc solenoid and the 96+ (EEC-V) requires a 10ohm tcc solenoid.
Reference the 4R70W SWAP INFORMATION for specifics.
Also see the TRANS TUNING WRITE UP for more details on modifying the transmission parameters.
Can my tune cause a no start?
No (but maybe yes), the EEC-4 does not control the starter relay solenoid. Some 2003 - 2004 EEC-5s do have provisions
for starter relay control used on select luxury sedans such as the 03/04 Marauder and the like. The hardware in the ecu
is present only if the vehicle was equipped with it. Unless you've wired it up to your starter interrupt relay and have
a pats code fault, the car should start up no problem.
Can I use a 6 cylinder ECU to run my v8 ?
No, the v6 ecu's only have 6 injector outputs, you can use an 8 cylinder ecu in a
6 cylinder or 4 cylinder application though, but you cannot use a 4cyl or 6cyl ecu in an 8cyl.
If you have any questions along the way don't hesitate to post on the support forum
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