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Topic: fuel computer 2.3 ghia (Read 446 times) |
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scorpio197
Full Member
FORD = Fix Or Repair Daily or Found On Rubish Dump
Posts: 128
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fuel computer 2.3 ghia
« on: Jan 4th, 2007, 8:43pm » |
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I dont have an owners handbook for my scorpio and I have a burning question about the fuel computer .If you press the larger button it changes from temperature to miles ,miles per gallon etc ,can some one tell me what do the other two buttons do ? mine dont seem to do anything at all . Do I have a problem or is it because its the lower series ie not an ultima ..thanks guys in advance ..david
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scorpio_man
Administrator
Ford Kuga awd
Posts: 5654
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Re: fuel computer 2.3 ghia
« Reply #1 on: Jan 4th, 2007, 8:48pm » |
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hi there
most times it just the buttons that need cleaned out. take it apart but be careful of the wee springs.
handbook
hth
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Jonnycab
Senior Member
Former owner of 2.3 Ultima Facelift saloon
Posts: 3900
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Re: fuel computer 2.3 ghia
« Reply #2 on: Jan 5th, 2007, 12:11am » |
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The buttons on the module do tend to stop working after a while.
Spraying with a bit of switch cleaner seems to help, but doesn't last forever.
I find that if I hit it underneath (not kidding) a couple of times then it works. 
Also the reset button has to be held in for a couple of seconds 
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scorpio197
Full Member
FORD = Fix Or Repair Daily or Found On Rubish Dump
Posts: 128
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Re: fuel computer 2.3 ghia
« Reply #3 on: Jan 13th, 2007, 7:20pm » |
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thanks for the info folks ,I tried to clean it ,still not working ...took it apart cleaned it sprayed it with switch cleaner ...still not working ...I got another switch from ebay ...and still the reset button fails to work  ..My local FMD said disconect the battery for half an hour and see if it resets ,if it does then it must still be a faulty switch..has anyone got any more ideas please 
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TiberiuS
Senior Member
Ex. 1996 2.3 Ultima - RIP P789 KHJ
Posts: 2257
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Re: fuel computer 2.3 ghia
« Reply #4 on: Jan 13th, 2007, 7:34pm » |
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It's the design of the contacts, stripped mine and cleaned it when I first owned the car. But then how often do I use the computer I ask myself  , the only time I ever use the buttons is when I've had the battery off and it's defaulted to metric 
If you're nimble with a screwdriver then you can 'prise' it out and get at the contacts...switch cleaner doesn't work well unless the contacts move against each other, dislodging the crud
Regards, Bruce.
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Bruce - '07 Jaguar XKR coupe, '95 Jaguar XJ Sport 4.0, '82 Ford Capri 2.0 Ghia, '15 Honda Civic (sloooooww..)
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Mummra
Full Member
Mummra-the-ever -living
Posts: 286
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Re: fuel computer 2.3 ghia
« Reply #5 on: Jan 13th, 2007, 9:58pm » |
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Hi, the best way to clean the contacts is with switch cleaner and a toothbrush to get right into the contacts. I would also check the underside of the board as well, because I have had dry joints on the switches and resoldering them should do the trick.
Don't forget the R button needs to be held down for a few seconds and that it only resets the average readings and will have no effect on any of the other settings.
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harry.m1byt
Full Member
What's YaBB?
Posts: 792
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Re: fuel computer 2.3 ghia
« Reply #6 on: Jan 14th, 2007, 9:35am » |
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Isn't there a diagnostic in the dash which enables you to test the function of the fuel computers buttons?
For information:-
The 3x buttons don't connect onto individual wires to go to the computer, they use a crude form of multi-plexing where each button feeds a different resistance back to the computer when pressed.
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August '95 2.9 12v auto Ultima -
Now flashing
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