XF vs EA Tachos - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars

sgreatwood · 09-26-2002, 08:33

Does anyone know if the tachos from XF clusters are the same spec as EA? I picked one up from the wreckers yesterday, as it was lying on a back seat by itself and got it for $13, but when i try and run it in my EA 3.9CFI as a top-of-dash mounted tacho, it reads about 400rpm or so higher upright (normal position) than when flat. The flat reading seems more correct too (dad's tacho is dead, so i can't check it).

i'm wondering if the tacho is different or if the coil is putting out a different voltage or something. Also, I've read here that redline is about 5500 rpm, but I ran the tach today on Maroondah hwy and I backed off the throttle at a reading of about 3800 rpm as it sounded a bit scary... i'm thinking it was closer to 5 than 4...

Are the ECUs the same between XF efi and EA efi?

thanks for any help guys

Simon

carazy · 09-26-2002, 20:17

the techo works on the pulse of electricty not the amount of voltage so I can't see how it would be differant
Oh and the ECU's are very different.

sgreatwood · 09-26-2002, 23:06

OK, thanks. aren't the CFI EA & XF both EEC-IV? I just did a search of the board.

Troutman · 09-27-2002, 00:44

Quote:

Originally posted by sgreatwood
OK, thanks. aren't the CFI EA & XF both EEC-IV? I just did a search of the board.

I understand they are. However, EA and EB II are also EEC-IV, and they are by no means the same. The programming and features would presumably differ slightly.

sgreatwood · 09-27-2002, 07:59

Ah, thanks Jack. sorry for the wrong forum - wasn't sure just where to put it. btw, nice wheels :) I think I like the turbos better, but they look pretty schmick now :)

Simon

EDXR6 · 09-30-2002, 01:55

if it is an aftermarket tacho, ie not a ford factory one then it should just work. all u need is ground +12 and a tacho signal. also check to see if it has a switch on the back of it to select if it is a 4 - 6 or 8 cylinder car

sgreatwood · 10-05-2002, 07:36

EDXR6, thanks for the tip, but it's an XF electronic tacho, from an XF dash. (just the dial and back stuff, not the cluster).

I've pulled it out, but did the XF have a V8? could that be the problem? maybe the needle just got bent... must have been a lot though and doesn't look it...

ta

Troutman · 10-06-2002, 02:26

Quote:

Originally posted by sgreatwood
EDXR6, thanks for the tip, but it's an XF electronic tacho, from an XF dash. (just the dial and back stuff, not the cluster).

I've pulled it out, but did the XF have a V8? could that be the problem? maybe the needle just got bent... must have been a lot though and doesn't look it...

ta

The only V8 XFs are those that have been converted aftermarket. With this kind of query, the best way to find out if it works is having a go at hooking it up. :)

If it's no good, and you still want a digital dash, I'd try selling the XF dials and buying EA ones.

Hope this helps.

LoverBoy · 04-10-2003, 09:00

Quote:

Originally posted by EDXR6
if it is an aftermarket tacho, ie not a ford factory one then it should just work. all u need is ground +12 and a tacho signal. also check to see if it has a switch on the back of it to select if it is a 4 - 6 or 8 cylinder car

hey EDXR6 you seem to know your stuff.
Was wondering if you could help me here (or anybody in the know)
I just brought an after market tacho (3 3/4", before you call me a "RiceBoy" the bloke at my wreckers quoted me $140 for an ea s pak cluster, and the tacho was only $98) and it has four wires:
but there's 2 I'm unsure of, one of them being the tacho lighting and the other being tacho signal, from my understanding it's a pink wire, you have an ED so I thought i'd ask you where it is.
Help would be GREATLY appreciated.
Cheers
Mason.

LoverBoy · 04-10-2003, 18:35

Please, anyone who knows how to hhelp me with an ED?!