Ford EEC-IV wiring (1993 Mondeo, Zetec 2.0)

[alga]

Oooh, thanks a lot for the pointers. I was going to get the contacts from the generic electronics suppliers like Digikey or Farnell. JPT terminals are widely available, but the 1.6 mm round pin system of the oval plug appears to be quite rare.

As for deleting pluse air, canister purge and EGR sensors & valves, I haven't been able to try it out yet.

[big_wasa]

Originally Posted by alga

As for deleting pluse air, canister purge and EGR sensors & valves, I haven't been able to try it out yet.

No you will be fine with out these and more besides. Such as the air con presure switches and other load adjusters like the heated windows and clutch.

It also runs fine with out the speed sensor But I do plan on refitting that as there are meant to be other gains such as fuel cut on over run ect.

Dont limit your self to the early eec-iv as the Pat's is no big deal as long as you have the matching key and you gain the obd2 function.

Ive done several and had one I did through iva

Pre 95 deep ecu

http://youtu.be/Pxq4ks2Us_U

Post 95 (1997)104 pin eec-v with Pats owls ecu

http://youtu.be/BKqeCjdBM0w

1999 104 pin eec-v with pats Olw5 ecu. This was wired for a midi and shows how few connections there are. Done so the user only had perm live switched live, a few earths, fuel pump and there is one for the tacho.

http://youtu.be/pUbV0NPvx4M

[Bonzo]

Originally Posted by big_wasa

No you will be fine with out these and more besides. Such as the air con presure switches and other load adjusters like the heated windows and clutch.

It also runs fine with out the speed sensor But I do plan on refitting that as there are meant to be other gains such as fuel cut on over run ect.

Dont limit your self to the early eec-iv as the Pat's is no big deal as long as you have the matching key and you gain the obd2 function.

Ive done several and had one I did through iva

Pre 95 deep ecu

http://youtu.be/Pxq4ks2Us_U

Post 95 (1997)104 pin eec-v with Pats owls ecu

http://youtu.be/BKqeCjdBM0w

1999 104 pin eec-v with pats Olw5 ecu. This was wired for a midi and shows how few connections there are. Done so the user only had perm live switched live, a few earths, fuel pump and there is one for the tacho.

http://youtu.be/pUbV0NPvx4M

Some really usefull information there Big W

[alga]

So, I have got the engine wired and running with the stock ECU. Some notes:

* I'm using an LED with a resistor to read error codes on the STAR connector. I made a plug to connect to the triangular STAR socket by pulling out the terminals out of a similar plug and inserting them into a triangular male plug which was used to blank one of the unused plugs on the engine harness, speed sensor or somethinlg like that.

All the removed systems (Pulse Air, EGR, Power Steering valve) are ringing error codes in the STAR connector. They are a bit annoying as you have to read them all slowly just to see if there are any other codes. I'm not sure if it's worth silencing these errors by adding resistors where needed. Fuel pump relay code is also signalled. Probably the ECU expects the pump to stop after building out the pressure when the engine is not running, mine is always running when ignition is on.

* The tach signal is 12V positive pulses 1 ms in duration. Sierra's tach expected a coil signal, with negative pulses from 12V to 0, and didn't work with the ECU signal. I made a logic inverter out of a MOSFET, now the tach works. I can post the schematics if anyone is interested.

* The radiator fan control signal is grounded for off, disconnected from ground for on. So, another MOSFET is needed to drive the fan relay, or a normally closed relay. Or an original transistor fan relay out of a Mondeo.

* The engine tends to foul plugs, from time to time one of the cylinders refuses to fire due to no spark. Might be old sparkplugs, or the engine might be running rich at idle. I think the ECU relies on EGR at idle speeds. I haven't gotten around to checking the oxygen sensor yet.

[twinturbo]

Missed this last year.

The oval plug is a ford specific plug.


I must try and get my blacktop running, I have an ecu which I think is PATS free but it's over a year since I looked at it.

TT

[alga]

I found the female terminals for the oval Ford plug at Würth. They came with pieces of red wire and silicone seals already crimped on, ready for soldering, and they cost something like 40p apiece (eek!)

[gaz05]

Originally Posted by alga

* The radiator fan control signal is grounded for off, disconnected from ground for on. So, another MOSFET is needed to drive the fan relay, or a normally closed relay. Or an original transistor fan relay out of a Mondeo.

There's two relays on the model with air con. One is switched on pin 31 and the other on pin 13. Do you know if it's possible to use pin 31 to switch a normal relay or is it be possible to use a five pin relay adapted to use the normally closed contacts and switched by pin 13? I'm adapting a Daiwoo Matiz fusebox with escort dash,sierra switchgear and Mondeo ECU.

[big_wasa]

No it wont work. The ecu uses the fan to draw the warm air for the gas conversion for the Ac to work. It relys on the pressure switches aswell.