V8 EEC V on a 4 cylinder

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johnhennessy
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V8 EEC V on a 4 cylinder

Post by johnhennessy » Sat Mar 24, 2018 4:48 pm

as the title suggests, i want to run a V8 pcm on a 4 cylinder, in fact a 2.3 duratec from 2003, this is now supercharged with an eaton M90 in suck through config.

Mike has been trying to tune this for some time but right from the beginning we,(that's the royal we) were dogged by the PATS system for no apparent reason.
it would seem that Ford changed the PATS in 2002 and it is no longer switchable from 1 or 0 and in my case shows 70 in the scalars so it can't be turned off.
this has locked me and Mike out of the tuning process, i think it is stopping a tune downloading and will randomly set to code 15, "incorrect key code" disabling the vehicle, i have no idea how to unlock this or why it happens, the first time i got lucky and it self healed after 2 days but its back now and i have a 2000lb brick in my shop that used to be a car.
to prevent this happening again and to use a more supported EEC V i would like to use a V8 pcm on my 4 cylinder duratec and preferably one with more support than the CAC1 straegy or the PRCD0 strategy Mike has been trying to use on the original pcm.
the only other changes apart from the supercharger are 39 lb. injectors and a mechanical thermostat, the MAF sensor is stock and the MAP sensor only sees vacuum as it is upstream of the s/c, the iac is functioning normally and all the other sensors are as OEM.
there is a boost bypass valve on the "out" side of the s/c which is vacuum controlled returning air to the "in" side of the s/c. the ignition is DIS not coil on plug.

so the original question, can i use a V8 EEC V, used prior to the 2002 PATS update, on my 4 cylinder duratec and re configure the cylinder count, engine displacement, the injector and plug firing order and anything else needed?

as it stands now my PCM is stuck and may not come back to life so the expense of a new PCM is on the cards as it were.

your thoughts would be much appreciated

John

jsa
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Re: V8 EEC V on a 4 cylinder

Post by jsa » Sun Mar 25, 2018 5:47 am

Short answer is yes you could.
Cheers

John

95 Escort RS Cosworth - GHAJ0 / ANTI on a COSY box code
Moates QH & BE
ForDiag

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skunk
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Location: Newmarket, ON

Re: V8 EEC V on a 4 cylinder

Post by skunk » Sun Mar 25, 2018 5:49 am

Hey John, theoretically yes you can run your 2.3 on a v6-8 ECU. In practice you need to figure out wiring changes and hardware compatibility and if the definition file is broken out enough for your required changes to software. You probably wont get a lot of help since there aren't many out there doing this sort of thing. I think there is an old thread on this site discussing using a 5.0 eec-iv to run a Lima 2.3 with dis............your in uncharted Guinea Pig territory lol

I have an old Lima 2.3T I am planning on experimenting with doing this same thing if time permits this summer. I will post the random notes I copy and pasted years ago into a notepad for reference. Keep in mind the notes pertain to EEC-IV and may not be accurate or apply to you....I take no responsibility for the content.
  • Here is how to change to make an A9L work with anything from a 1 to 8 cylinders.

    Change the following:
    Number of HEGO Sensors:
    Number of Cylinders:
    Firing Order:
    Fuel Injector HEGO Selection:


    STOCK A9L 302:
    Number of Hego Sensors: 2 ( 1 or 2)
    Number of Cylinders: 8 (1 to 8, new processors to 10)
    Firing Order: 1-3-7-2-6-5-4-8 (which is done sequentially left to right)
    Injector EGO Selection Port: 0,0,0,0,2,2,2,2 (sequentially read left to right ie, for inj 1,3,7,2,6,5,4,8) where 0=EGO1 and 2=EGO2

    To make this same A9L use one EGO1 only, set the entire bank of EGO selection port values to 0,0,0,0,0,0,0,0.
    To make this A9L use EGO2, set them to 2,2,2,2,2,2,2,2.
    Note, you can change any 1 port to use either side, as long as the hego is on that injector side.
    Note, if number of EGOs is set to 1, then EGO1 is used only and all data should be set to
    0,0,0,0,0,0,0,0. Note, that the eec uses the number of cylinders to loop through the firing order and ego selection port.
    Keep in mind the selection port always contains 8 ports in the bin file, however depending on the number of cylinders programmed in
    will say where the eec stops using ports. For example, for a V6:

    V6 EXAMPLE (the xample you sent looks correct) for 2- O2 SENSORS:
    Number of Hego Sensors: 2
    Number of Cylinders: 6
    Firing Order: 1 4 3 6 2 5 0 0
    (NOTE! The eec does not care what is programmed in the last two slots, ie 0 is ok and will be ignored)
    Injector EGO Selection Port: 0,0,0,,2,2,2, 2(not used), 2(not used)

    V6 EXAMPLE (the xample you sent looks correct) for 1- O2 SENSOR:
    Number of Hego Sensors: 1
    Number of Cylinders: 6
    Firing Order: 1 4 3 6 2 5 0 0
    (NOTE! The eec does not care what is programmed in the last two slots, ie 0 is ok and will be ignored)
    Injector EGO Selection Port: 0,0,0,0,0,0, 2(not used), 2(not used)

    There's some more things that require altering for a 4 cylinder conversion;

    Engine_Displacement (aka SARCHG) perhaps I'm stating the obvious with this one.
    Ignition_Degrees_Per_PIP (aka DEGPIP) - set to 180 degrees
    PIPs_per_Rev (aka ENGCYL) - set to 2
    Signature_PIP_Multiplier_Highest_Value (aka SIGKLU) - set to suit 30% dutycycle
    Signature_PIP_Multiplier_Lowest_Value (aka SIGKLL) - set to suit 30% dutycycle

    The following may also need altering to ensure the pulsewidth conversion factor still works;

    Number_of_Injector_Output_Ports (aka NUMOUT)
    Number_of_Pips_Between_Injector_Outputs (aka PIPOUT)

    In addtition to what I posted before, here's another parameter that will need changing;

    Signature_PIP_Difference_Value (aka MHPFD) - set to suit 30% dutycycle
That's all I got......Good Luck!
John
1987 Turbocoupe.
A3M1/A9L, BE/EA, Tweecer RT.
306,Single Turbo, Ported E7's, Ported Stock Intake, 42lb Matched Green Tops, PMAS 3" Blow-Thru Protube (42# supercharger calibrated),T5z, 3.73 gears
..... Nothin Fancy.......Just something to keep me from the honey-do list.........

johnhennessy
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Joined: Tue Feb 27, 2018 12:21 pm

Re: V8 EEC V on a 4 cylinder

Post by johnhennessy » Mon Mar 26, 2018 6:24 pm

maybe i should consider a pcm from a 2001 2.3 ranger because the pats is pre 2002 and should be switchable to disabled?

disciplerocks3
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Re: V8 EEC V on a 4 cylinder

Post by disciplerocks3 » Sat Mar 31, 2018 11:24 am

Hey skunk I have another question about this. What would need to be done on the pinout to add features to an ECU that did not come with them besides turning them on in the strategy? Say like VCT, or intake manifold runners?

For example: I want to run a 2.0 ecoboost motor with dual vct on an 04 2.3 ECU without vct.

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skunk
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Location: Newmarket, ON

Re: V8 EEC V on a 4 cylinder

Post by skunk » Sat Mar 31, 2018 2:03 pm

I am no expert but if the ECU can actually support the hardware you would need to determine which pin controls it and add the wiring. Be aware It's not uncommon to have the data available in software but the actual hardware lacks the ability to drive components. Best bet is once you determine the appropriate pin, activate the software and check for an expected output such as continuity to ground for a switch or Hz for something modulated

Sorry bud....wish I had a better answer for you. You, just like the OP are in Guinea Pig territory!

Good luck
John
1987 Turbocoupe.
A3M1/A9L, BE/EA, Tweecer RT.
306,Single Turbo, Ported E7's, Ported Stock Intake, 42lb Matched Green Tops, PMAS 3" Blow-Thru Protube (42# supercharger calibrated),T5z, 3.73 gears
..... Nothin Fancy.......Just something to keep me from the honey-do list.........

disciplerocks3
Gear Head
Posts: 2
Joined: Tue Oct 06, 2015 5:11 pm

Re: V8 EEC V on a 4 cylinder

Post by disciplerocks3 » Sat Mar 31, 2018 6:50 pm

Makes sense. Thanks for the help.

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