Re: [Quantum Owners] H4 EFI ECU

Jim Hearne Wed, 20 Dec 2017 10:37:37 -0800

Oops, sorry, i was thinking of the Mondeo ecu location.
Been a while since i worked a Mk3 Fiesta.


Jim


On 20/12/2017 17:28, 'Steve Kodz' via Quantum Owners Group wrote:


Julian,

The ECU is indeed located behind the glove box as standard on the H4,replicating the location of the Mk3 Fiesta. It'll most likely be arectangular metal box. To remove it you need to undo the rubbergrommet in the engine bay then remove the wiring that is secured witha bolt (M6 I think). The ECU should then unclip and drop into thefoot well.

I'll leave you in Jim's capable hands to determine the correct/bestECU for you.


Regards,
Steve


On 20/12/17 17:17, Julian Coleman wrote:

Jim, Bill

Thanks for the note re the spares supply Bill, I may well need it,although the engine is running pretty well so it's not a case offixing something dead. It just doesn't feel quite right.

Jim, the car is H4 GTX which people seem to know about. (It'scurrently white, although it was once yellow it seems.)

The ECU is behind the glove box. Nearby are the air bag controller(no air bags so I assume this is just to keep the management stuffhappy), and the immobiliser box (brown plastic). I took a photo ofthe ECU and it looks just like the ones on e-bay (it looks a bit likean over-sized hard drive), though I cannot see the connector end sohaven't confirmed the ident code. So I think I have located the rightbox.

From your comments, would it be sensible to swap the original ECUwith a Mondeo unit? If so which one? Ideally I'd want to be able tohave it programmed - the car has non standard manifold and exhaust,no cat, modded inlets, and that's just what I can see. Unless it hasbeen tweaked (of which I have no evidence, so I'm assuming not), itcan't be running as well as it might and I've read the 1.6Si settingscan blow the 2L engine, though I suspect only if you get on to atrack and push hard!

That said, I assume any compatible ECUs would not have theprogramming ports either.


Your expert comments are really appreciated!

I'll check out the MAF and injectors tomorrow.


Julian Coleman
City Audio Services



    ----- Original Message -----
    From:
    [email protected]

    To:
    "[email protected]" <[email protected]>
    Cc:

    Sent:
    Wed, 20 Dec 2017 16:07:52 +0000 (UTC)
    Subject:
    Re: [Quantum Owners] H4 EFI ECU


    If you need a replacement ecu, turbobreakers may be able to
    help....this is their flEbay user name.
    Bill


    On Wednesday, 20 December 2017, 15:28, Jim Hearne
    <[email protected]> wrote:


    Yes, the diagnostic port is just a 3 pin connector, usually in
    loom across the rear of the engine bay.
    There is also often an identical connector that is for the octane
    adjusting plug.
    If you find a 3 pin connector with a plug with a loop of wire
    connected into it, then that is the octane plug.
    Not that it will help you much as it’s pre OBD standards and will
    only work with a specific diagnostics code reader.
    You can get the codes out with an led and switch but it’s fun
    counting the flashes.
    The mondeo Ecu’s are still around and you are lucky your H4 is
    based on a 1.6SI as thats the only Fiesta loom that is pin
    compatible with the early Mondeo 2.0 ecus.
    While you are in the engine bay see what the part number on the
    MAF is and what colour the ring on the rear of the injectors is.
    Just noticed you mentioned the ECU is above the glovebox, are you
    sure thats not an alarm control box, the ecu is under the drivers
    side of the dash (unless yours is LHD) ,  next to the door pillar.
    Is your H4 Blue ?
    Jim
    *From:* Julian Coleman
    *Sent:* Wednesday, December 20, 2017 3:18 PM
    *To:* [email protected]
    *Subject:* Re: [Quantum Owners] H4 EFI ECU
    Jim
    That's really helpful, thanks.
    I've since been told that the diagnostics port, if it has one, is
    not part of the ECU itself but separate and can be located just
    about anywhere.
    Your comments re the ECU being compatible are really interesting.
    I guess it raises the question as to what the best solution is.
    I'm guessing finding an appropriate 2L ECU is not as simple as it
    sounds. But step 1 is finding out what is in there!
    Regards

    Julian Coleman
    City Audio Services



        ----- Original Message -----
        From:
        [email protected]
        To:
        <[email protected]>
        Cc:
        Sent:
        Wed, 20 Dec 2017 14:40:31 -0000
        Subject:
        Re: [Quantum Owners] H4 EFI ECU


        You just need to undo the clamp from under the dash.
        Then, in the engine bay undo the M10 bolt in the centre of
        the big connector and the ecu will drop down into the car.
        The 2.0 won’t run very well with a 1.6ecu as the 2.0 has a
        different MAF and injector size.
        But that’s the next step , first find out what the ecu is,
        you are looking for a 4 letter code that usually spells a word.
        I think GURU was the 1.6si code and DEEP, DESK and another 4
        letter word begining with D were the 2.0 Mondeo ecus
        Jim
        *From:* Julian Coleman
        *Sent:* Wednesday, December 20, 2017 2:15 PM
        *To:* [email protected]
        *Subject:* [Quantum Owners] H4 EFI ECU
        Hi
        I'm attempting to get to grips with an H4 which has a 2L
        Zetec but I believe run by an original ECU for a 1.6 Zetec
        (Mk3 Si). I have found the unit, up behind the glove box
        where it's not too easy to get at and I cannot see any
        labels. I need some practical advice as to how to gain access
        - I can't actually see what is going on up there.
        I think I can probably loosen the clamp bolt. But what
        happens if I do? Would the unit drop out with its wiring
        attached? Where would the diagnostic port be?
        Any other info would be gratefully received.
        Regards

        Julian Coleman
        City Audio Services