converted my s2 to efi 3i loom ofac ecu powerchip and 701's but on idle its rich and hunts and on boost its so rich it pops in the exhaust have put a new co pot on it but when i turn it the co stays the same any ideas on what i could try next

 

check the map sensor is in good working order. who mapped it for you?

 

This seems to be happening to every person that converts over to EFI

I'm beginning to think maybe theres something thats being missed

 

havent tested the map sensor yet might be worth a shot

what has everyone else done to overcome this problem ?? its starting to piss me off cos everything i do dont make a difference i just need to be pointed in a different direction

 

I have no idea i never really see any answers.

To be honest though without even a CO analyser you can't even set the car up for basic running.

You have the FPR and CO pot to play with in order to get the correct fuelling. I'd fit standard injectors and remove the chip firstly though and see if you can get the idle micture right before jumping in at the deep end.

 

can u adjust the fpr ?? this 1 came off a 3i efi would that make a difference

 

yea its got a grub screw in the middle.

Not too sure if the fuel pressures are different between the two, but worth getting it checked!

 

ages ago i rad something about there needing to be pin changes when using the xr3i loom and ofac ecu,i saved the basic info but not the reason why,but im sure whoever it was who posted says it was something about the fueling

here is what i got

1) Pin no. 8 (brown) needs moving to pin 27, which is empty (CO adjuster signal wire)
2) Pin no. 27 (brown/yellow) needs moving to pin no. 45
3) EDIS Module pin 2 (blue/yellow) may now be disregarded as it is not used by the 0FAC ECU (pin 28 on ECU).

i had a fiesta turbo loom whice came with my ecu and compared the two,the only difference between the two was the brown/yellow wire,the brown one that it says needs moving was already in the same place on both looms but the bwown/yellow needed moving on the xr3i loom as it sways above

 

As far as im aware the OFAC & 31 looms are identical, with the exception of cutting pin 2 of the EDIS plug (Blue/Yellow) wire.

now......an OFAC loom is the only loom ive not had in my hands so i can't vouch for that 100%, ive been going by diagrams.

bassy_g did you continuity test every wire?

 

the mystery deepens
when i get my car back from the body shop i will try that cant make it any worse

anyone else have any opinions on this??

 

Im half tempted to buy an OFAC loom now just so i can bell it all out and make sure my knowledge is 100% on it

 

iv got one

 

Ill give you 50p for it, you know its for a worthy cause.....

 

Ill swop it for your motor

 

i just looked at them side by side mate,i dont even no what a continuity test is.
the pins on the ecu connecter were identical appart from

1.xr3i/orion loom had no amal valve wire

2.the brown/yellow wire was at pin 27 on the xr3i/orion loom and at pin 45 on the ofac fiesta turbo loom

 

Are you 100% that pin change is the only difference?

i really do need to get a loom in my hands

Turbo-Beal

 

Well i thought your car was worth around the 50p mark so i thought is would be a good trade

ill have a look at my loom and check the pins for you if you want?

 

on mine im 100% sure,i changed that pin on my orion loom to match the fiesta turbo ofac loom,
the other pin(no 8) that is mentioned above was at no 8 on the fiesta loom as well