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Old 08-13-2004, 20:30   #1 (permalink)
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Converting XF to EFI

How hard is it to convert an XF carby to EFI, what parts am i going to need, do i need to re-wire the whole thing, etc and what problems could i run into?
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Old 08-14-2004, 01:58   #2 (permalink)
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Re: Converting XF to EFI

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Originally Posted by the_wheel_man
what problems could i run into?
Ahh, it could run worse than when it was carby. If you are seriously contemplating this do not use the std efi ecu, it was pathetic and the airflow meters 1/2 th time don't work properly especially after a backfire up the intake tract. The hardware like the manifold and etc is fine though.
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Old 08-15-2004, 04:54   #3 (permalink)
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Re: Converting XF to EFI

i looked at it and then threw the idea out i had the kit for it an everything but you have to rewire the whole car for it and i had all the wiring for it out of a wreck i bought.

look at this stuff.

-wires for fuel pump
-you need an efi tank cuase the hole for the sender in carby is about 10cm diameter and the efi is about 20cm becuase of the in tank pump.
-wires running from the air flow meter go in the drivers side firewall and then run through the dash to get to the ecu.


thats just a few things i found that were going to be a pain in the arse

so i bought an xf fairmont ghia and it has the efi as standard with the limited slip diff.
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Old 08-16-2004, 00:46   #4 (permalink)
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Re: Converting XF to EFI

i was just thinking about this the other day but i dropped the idea because of all the screwing around involved...mainly my gas setup would need to be changed to fit EFI..but thats just one reason...
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Old 08-16-2004, 19:15   #5 (permalink)
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Re: Converting XF to EFI

When I put EFI in the PV it was a bare sheel rebuild, can't remember how much trouble the loom was. You are spot on with the parts required and I agree with "not ford" the EEC IV in the XF is crap compared to later ones.

I've just converted the fuel pump to an external VL to get my fuel gauge working again. I had been using a mofied ED wagon pump and housing but now I just use the std XF gauge.

No reason why you couldn't do the same in a sedan
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Old 08-16-2004, 19:33   #6 (permalink)
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Re: Converting XF to EFI

Its actually really easy to wire the engine bay for EFI. You only need to replace the wiring from the firewall forward (most, if not all the required qires should be in the existing loom). You probably have to take the dash out (or lean it forward) to get the ECU loom thru the firewall on the passenger side. Apart from that, everything should be a breeze.

I did the opposite about 8 months ago, I got rid of all the EFI wiring and replaced it with an engine bay loom from an 84 XF with the HEI electronic distributor.

I did all that cause I wanted to go straight gas and get rid of the ECU controlled spark timing so that the timing can be played with now by way of recurving.

Having said all that, "not ford" is right the XF EFI is prtty crap, but I have seen an XF EFI turbo still using the stock airflow meter, so things CAN be done.
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Old 08-16-2004, 21:53   #7 (permalink)
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Re: Converting XF to EFI

The main problem is the head. Most unleaded XFs had a head that the injectors can go into, but the leaded ones didnt.

I actually found with an XF that I once had (after some reading too) that the XF unleaded heads are a higher compression ratio than the XF EFI. I did notice the difference in power when driving it :)

The easiest way to see if your head can have EFI bolted on is to look at the inlet ports. If they have little bits cut out of them (i.e. round with another small round piece out of them) then it can cope with EFI. If the ports are perfectly round then the manifold and injectors wont go on it.

I think I have most of the XF EFI gear sitting around here. If you are interested drop me a PM.
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Old 08-17-2004, 18:14   #8 (permalink)
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Re: Converting XF to EFI

The EFI heads have a different casting number stamped in the side - don't have the exact info on me, but the EFI version had something like EI and carb CI stamped on it (I'm sure that's wrong - but you get my drift).
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Old 08-17-2004, 18:20   #9 (permalink)
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Re: Converting XF to EFI

Quote:
Originally Posted by roofi
The EFI heads have a different casting number stamped in the side - don't have the exact info on me, but the EFI version had something like EI and carb CI stamped on it (I'm sure that's wrong - but you get my drift).
Actually, I recall that I think there was a E1, E2 and a C1, C2.

I dont remember which can take EFI though :S (all Es and some Cs).
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Old 08-17-2004, 18:45   #10 (permalink)
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Re: Converting XF to EFI

I'm almost certain that all of the heads on the XF's had the releifs for the Injectors, I Think it was only the early alloy heads form the XD's and XE's that didnt.
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