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        General >> Problems >> fuel computer 2.3 ghia
        
(Message started by: scorpio197 on Jan 4^th, 2007, 8:43pm)

Title: fuel computer 2.3 ghia
Post by scorpio197 on Jan 4^th, 2007, 8:43pm

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

Title: Re: fuel computer 2.3 ghia
Post by scorpio_man on Jan 4^th, 2007, 8:48pm

hi there

most times it just the buttons that need cleaned out. take it apart but be careful of the wee springs.

handbook (http://www.fordscorpio.co.uk/handbook.htm)
hth

Title: Re: fuel computer 2.3 ghia
Post by jonnycab on Jan 5^th, 2007, 12:11am

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 :)

Title: Re: fuel computer 2.3 ghia
Post by scorpio197 on Jan 13^th, 2007, 7:20pm

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 ???

Title: Re: fuel computer 2.3 ghia
Post by TiberiuS on Jan 13^th, 2007, 7:34pm

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.

Title: Re: fuel computer 2.3 ghia
Post by Mummra on Jan 13^th, 2007, 9:58pm

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.

Title: Re: fuel computer 2.3 ghia
Post by harry.m1byt on Jan 14^th, 2007, 9:35am

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.