fiestaturbo.com

[Andy.B]

Just to say that not having the supressor wont harm anything, and most of the top tuners take these out and hard wire the MAP sensor in when they map your car. Aparently it makes the signal stronger to the ECU and it will make things work a little faster... ie the signal is alot stronger so you the senor can relay the signal to the ECU faster causing the ECU to do what it needs to quicker (must be talking mili secs) but aparently it makes a difference (Dont hold me to that but its only what i have been told).

Oh and nice update Scort you are spot on with those wire and pin outs.

As I have always said check everything corellates by using a buzzer or a multimeter before doing any of this. I cant be held responsible for you ECU going funlumps up.

[fordrs turbo]

so if i do these pin changes on my xr2i it would run like a frst with out changing the wiring loom and ecu. I have only putted a turbo in it and its going crazy at 0.4 bar ore do I need a full wiering loom end frst ecu?

[Farooq]

great i knew this would happen now i dnt know what to covert the 2i loom can an1 clarify what changes need done???????for 8v 2i to a ofac cheers

[alanl1978]

do i have to fit an extra plug for the charge air temp sensor or is this not needed to run the car

[cossiemk2]

The charge air temp sensor is already on the 2i. (on the side of the intake manifold(white plug)

If using the OFAC system, you need another sensor with a reduction ring because this sensor has a different thread.
This sensor also has another plug on it(smaller) but this can be had at any scrappy.

[Dr_x2]

Mates to make a convertion from 2i to ofab, i need to change my air temp sensor? thanks

[Andy.B]

To clarify the Air sensor issue (IAT) you will need the FRST sensor no matter what you use eiter OFAB or OFAC. I will be getting the finnis number later. But all you need to do is solder on a std two pin plug just like the ones that connect to oval side indicators.

[Dr_x2]

Cool.
Thanks mate

[rs_turbo_cabriolet]

i converted my efi xr3i cabby to run the fiesta turbo lump with ofac
i DIDNOT have to change any wires over in th ecu. just had to disconnet pin 2 on the edis

[Roosie]

would it still work if u didint change pin 2 on edis

[Roosie]

btt

[Andy.B]

Errrm yeh it should still work if pin 2 is left in, im not sure it actually feeds anything in a Turbo ECU. If you look at the FRST wiring digs it shows pin 2 is not needed and only needed on N/A cars. Not sure what it does Scort may be able to give a better answer to your question on what will happen...

[Seaniboy]

Hi. Some of you may know me and a friend have been putting a FRST engine in a MK5 Escort.

We got everything working fine and took it to the rolling road on Friday to get everything checked over.
We had a problem in that the CO was 8% and adjusting the potentiometer did nothing. The car also was pinky very very slightly at only 10psi!! .
So basically very rich on idle and leaning badly out higher up the range.
Something that is also strange out of 3 runs at 10psi it only pinked once??

Now here comes the bit as to why i have posted in this thread.

The car originally had a 2i lump in it and i did the wire changes stated in this guide. We have a OFAC brain.

After Friday i could not understand why this would happen and started reading the rest of this thread.

I then moved pin 27 back to 8 and the car seems to be more happy and seems to idle much more stable. I am just wondering what this pin does
-

2) Pin no. 45 (brown/yellow) needs moving to pin 27 - this is for the MAP sensor.

And should i change it back

[***Liza***]

My brain hurts... one Q , can i use my exsiting 16v loom (k plate 2i) to ofac ? cheers!! ( j have not read the whole article! before anyone slates me);p;

[Xr_Dub]

ANDY where all the xr2i 8v's all ofab ecu's?

it wud say ofab on the ecu? need some info on this

[fastford]

so which is better to run ofab or ofac?

[stevecnet]

i am new to fiestas could someone please tell me what OFAC and OFAB is and stands for? cheers

[maysaXr2i]

changing 8v 2i to OFAC is the IAT sensor the only sensor i will need to change or are there others>??????

[maysaXr2i]

changing 8v 2i to OFAC is the IAT sensor the only sensor i will need to change or are there others>??????

[kondis]

changing 8v 2i to OFAC is the IAT sensor the only sensor i will need to change or are there others>??????

thinking this too, or do i need to change also the map sensor?

[mad-fiesta]

Hi.
i was just wondering about the following Pin 4: Pin 20 (ECU) Current return..where would that wire be connected too as im currently trying to do a conversion on a mk6 escort and that wire has me a bit baffled..Thanks.






Pin 1: Ignition Live
Pin 2: Pin 22 (ECU) to the Fuel Pump Relay
Pin 3: Fed From DIS coil pack to the Rev counter
Pin 4: Pin 20 (ECU) Current return
Pin 5: Pins 57 & 37 (ECU) to the Fuel injection Relay
Pin 6: Oil Pressure
Pin 7: B+ (Constant Live)

[mad-fiesta]

All sorted out now..

[dangerousdave]

ok sorry guys i know this is an old thread now but i have bought a frst engine to put in my 2i i am lookin for map sensor now think i have one commin this weekend and a stage one chip in a ofac ecu was wondering if i use my 2i inlet manafold and sensors do i need to change the charge air temp sensor?? and also do i just need to chop one wire to pin 28 to have her running sweet? cheers guys any help would be amazing ta!

[fordy3636]

Hi i have a escort s1 am wanting to put efi mangement in could you tell me the wiring and the colours if you could that i join together
thanks loads steve

stevebailey599@hotmail.com

[dangerousdave]

alrite mate what management you using? and have you got a block witrh crank pos sensor? also flywheel to suit??

[abz88]

ive done these changes but car seems to not idle and u cant rev it. im using the ofab ecu

[1428levi]

hi sorry this is a little confusing theres so many opinions, basically iv got a g reg xr2i , i have the turbo engine with a ofac ecu, , do i need any thing else wwhat do i do lol , sorry

[cossiemark]

whats the difference between OFAB and OFAC what do they mean???

[cossiemark]

take it no 1 is answering ay of these posts anymore???????

[Xr_Dub]

[quote="SNP11Y"]take it no 1 is answering ay of these posts anymore???????[/quote]
they use different map sensor's and ofac can run more boost from what im aware of!!

[staceyray]

can you tell me where my iat sensor is or a pic of where it goes on my 8 valve xr2i cos it doin my head in lol any info will be apr?cheers

[NOZ3Y]

Hi well i'm a newbie anyways i just recently done an xr2i to rs turbo conversion which i regret badly anyways im having trouble with it i brought the engine complete with OFAC ecu and map sensor and basically i was told that i can just plug and play i then done research to find you cant didnt know about pin changes at the time my xr2i was running OFAB so basically i stripped out the wiring loom and replaced it with an OFAC loom i connected all together to find it still wont run but out of pure curiosity i connected my xr2i OFAB ecu on to OFAC wiring loom to find it started and idled, i have two queries 1. if i convert my xr2i loom to OFAC and connect the ECU will it start idle and run ok 2. with the OFAC wiring loom in and the xr2i OFAB ecu connected will it run like an rs turbo or is the ECU not programmed to run turbo I.E. Boost please reply and help me out with this fault i have spent hours trying to figure it out spent hundreds for parts which aint made a difference and its just sitting out side collecting rain and bird poo lol

[georgiocat]

Hello people.As many of you may know I bought a fezt engine with OFAB management and all the relevant stuff for my Escort Mk5b.The previous owner of the engine as far as I know was running at the begining with the OFAB and then went to parallel ECU and at the end at MS.I unwrapped the loom,(I am an electrician on business),and doublechecked everything.All is fine but I am troubled at a point.The previous posts was really helpfull and really cut down the time of transplant from my previous loom.But I stuck at a point.I have only two questions.First one:Is the current return from ecu going to earth?And second...I have no1 pin on edis plug cut.Is it needed for running?I read that pin 2 is not needed but the previous owner has cut the no1 also.I am thinking of reconnect it again.Should I?As far as I know,pin 1 is PIP,it is needed for ECU to understand that the engine is rotating and start injecting.Am I right?Please answer if you can,cause this week I want to finish it ;) Thanx a lot for your time,this thread is a real treasure,IMHO...

[georgiocat]

No one...? Well,today I started the looms interchange and connecting...I will try pin 1...Fingers crossed nothing bad will happen...I wouldn't afford it...And something last...On my previous loom(that is the Escort one),it had the carbon canister connected.Is there any case I can drive it with the OFAB?Anyone who has done it?

[georgiocat]

Well,nothing here too...Anyway,loom is connected now and working fine.Car starts up at once,idling fine and revving fine.Current return is the earth,since nobody answered my questions,I thought I maybe say that.Also...If you don't connect pin 1 of EDIS to the ECU,engine will never start up.You will have spark but injectors will not fire.Pin 1 sends a series of pulses to the ecu,and judging from that I guess it understands some parameters of the engine,and one of them is that it needs fuel.Perhaps you could use that for immobilizer also ;) I have to say that although I run an OFAB system,I don't use a map supressor.My loom hasn't the connector for it,but the most strange is that no one here in Greece know the existence of it...I guess they never sold them!!lol.Fingers crossed,I really really hope not to burn anything due to it's absent...Is there any way of knowing if my loom is a converted one,or a genuine OFAB loom?The map connector was not replaced,it goes straight to the ECU plug.Any ideas?Also...Can I use the purge canister with OFAB?Anyone...?