fiestaturbo.com

[georgiocat]

Here I have some info on OFAB mamangement.This is part of the info I used for the FEZT engine transplant in my MK5b Escort.Since I gather technical staff for ages now,I can't be sure where I found this,but obviously the opyright goes to the author,it is not mine just to be clear.It helped me a lot and hope to do the same with other people.If the admins want they can move it to the relevant section of the forum.Thanx.

Loom:


Loom plugs:


George

[georgiocat]

I have to clear out after some search that the schematics on Haynes manual,and autodata,that I have personally checked numberous times when I was converting my car,is for the OFAC,so if you are converting to,or checking OFAB layout you must follow this guide,not the guide in Haynes or autodata.I have also TIS guide but is is a pain in the a@@e to follow it,and as everybody who worked on wirring knows,when you do that kind of work you need a clear and easy to read schematic...

[FezzyGTI]

what is ofab ??? eg what type of engine is it for?

[georgiocat]

OFAB is one of the 3 types of management for the Fiesta turbo.OFAA was the first one,OFAB the second release from Ford which was based on the marelli map sensor,and OFAC being the last one which used the classic rectangular ford map sensor.It was on CVH engines,but can work on zetec turbos,although not sure on what needed for the conversion on a zetec since I never did it.

[TANGO.]

giorgio do you have any diagrams for the 12 pin car loom, grey colour at the back of the bay?

many thanks

wayne

[FezzyGTI]

[quote="vauxhallscum"]giorgio do you have any diagrams for the 12 pin car loom, grey colour at the back of the bay?

many thanks

wayne[/quote]





i would like this 2 plz if possible cheers 4 info

[georgiocat]

No my friend,I am sorry I haven't...

[TANGO.]

ok no worries dude, just needed to know what each of the brown wires are!!!!

[georgiocat]

If they are just plain brown ones,I mean no color trace on them,they usually are current return,ground.

[FezzyGTI]

[quote="vauxhallscum"]ok no worries dude, just needed to know what each of the brown wires are!!!![/quote]


I can show you 2 photo of the plug they go to on the loom inside the car. They go 2 a plug wi about 24 plain brown wire's in i hav the in car loom for a si in my bed room so traced them 2 try figure it out 4 my project.

[TANGO.]

that would be great mate nice one!!
I dont think it makes a difference which wire they go to as long as its another brown, would be nice to know for deffo though

[FezzyGTI]

Ok no prob's when i get home i will take a few photo's and post them up hope it helps. Not sure if its same for si loom as for this loom but i would of thought it is?

[FezzyGTI]

do ya mean this plug?
if so pins 12 and 7 (bown wires twisted together further in 2 loom) pin 8 brown wire on its own goes in 2 fuse box 2 many wire 2 see where it links 2 tho. pin 1 also brown wire joins 2 sum more brown wires looks like an earth

[IMG]http://i791.photobucket.com/albums/yy198/Nafrival/DSC07320.jpg[/IMG]
http://i791.photobucket.com/albums/yy19 ... C07320.jpg

they go 2 pins 1 and 14 on this plug

[IMG]http://i791.photobucket.com/albums/yy198/Nafrival/DSC07321.jpg[/IMG]
http://i791.photobucket.com/albums/yy19 ... C07321.jpg
hope sum of this helps

the images dint wrk so put links aswell

[mikeymikeyp]

sorry to post on an old thread but i was hoping someone had a idea where the 12 pin plug as in pic above joins to the 8 pin plug on ofac/ofab engine loom

thanks guys i do really need a bit of help here

[georgiocat]

Sorry m8,just saw your post...I believe your question is allready being answered by someone if I am not mistaken...

[mikeymikeyp]

thanks for the reply mate I found what i was looking for and posted it up
cheers

[georgiocat]

Sorry not to be so helpfull regarding your issue,but since I own an Escort and not a Fiesta,I couldn't help you really on that... :)

[Lee jst]

Can anyone tell me if there is much difference between this ofab wiring diagram and the wiring for a ofac loom?

Thanks lee

[s1chris]

Hi Lee,

Check this thread out as it may answer your question -

efi-ofab-ofac-differences-are-a-internet-myth-discus-vt65850/

Cheers Chris

[Lee jst]

Thanks for the link to that Chris intresting bit of info there

[90_Spec]

HI All,
I know this is an old thread now, but im running into the same confusion over it all.
Did anyone actually get tot he bottom of the OFAB / OFAC co pot/ MAP pinouts? i know there is a lot of opinion out there, but can anyone say, "YES" there are variations of OFAB where the CO pot and MAP are in different pin numbers to the conventional conversion guide ... those being CO pot signal on pin 8 and MAP signal on pin 27?

Also, does anyone know what the output voltage / signal voltage from the CO pot should be for a standard setup?
Hope you can all help,
Cheers, Rich