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Author Topic: MFA MPG  (Read 3837 times)

Offline Mitching

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MFA MPG
« on: 15 February 2011, 16:20 »

Small pic, but having difficulty uploading  :rolleyes:
Coming up 219, and on  drive yesterday it was 236, but only comes when I do the MFA reset by holding the button and turning power on, off then on again.
The only things working on the MFA is the clock, oil temp and outside temp.
Anyone know how I can fix it?
Cheers!
« Last Edit: 15 February 2011, 16:22 by Mitching »
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Offline SoundillusioN

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Re: MFA MPG
« Reply #1 on: 15 February 2011, 16:35 »
Quote from: Mitching on 15 February 2011, 16:20

Small pic, but having difficulty uploading  :rolleyes:
Coming up 219, and on  drive yesterday it was 236, but only comes when I do the MFA reset by holding the button and turning power on, off then on again.
The only things working on the MFA is the clock, oil temp and outside temp.
Anyone know how I can fix it?
Cheers!

Check vacuum pipes are all good. When mine worked,  :cry: I got odd readings when a hose had split.   worth a look.
« Last Edit: 15 February 2011, 20:46 by SoundillusioN »
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Offline Mitching

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Re: MFA MPG
« Reply #2 on: 15 February 2011, 16:56 »
Cheers, will have a look.
Where are the pipes? And where would they be split?
Can't find anything about it in the haynes  :rolleyes:
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Offline SoundillusioN

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Re: MFA MPG
« Reply #3 on: 15 February 2011, 20:57 »
Quote from: Mitching on 15 February 2011, 16:56
Cheers, will have a look.
Where are the pipes? And where would they be split?
Can't find anything about it in the haynes  :rolleyes:

Check all the rubber pipes that are usually only a few mm in diameter.  They are connected to places like the vacuum advance on the side of the dizzy and to various places on the intake manifold, one of which ends up going through the bulkhead to the back of your clocks in the dash.  (well that's how it is on the mk1 and I can't imagine it will be much different on the mk2)

All the small pipes (vacuum) in this diagram are for an 8v digi, can't remember what engine you have.


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Offline Mitching

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Re: MFA MPG
« Reply #4 on: 15 February 2011, 21:03 »
Cheers Shaun, muchly appreciated!
Yeah, mines a digi.
Will check it out in the light when the weather's a bit better!
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Offline SoundillusioN

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Re: MFA MPG
« Reply #5 on: 16 February 2011, 00:57 »
Quote from: Mitching on 15 February 2011, 21:03
Cheers Shaun, muchly appreciated!
Yeah, mines a digi.
Will check it out in the light when the weather's a bit better!

No worries.

Now I jumped on this thread as I presumed it was giving crazy MPG readings, thinking about it though is it only giving you those two numbers after a reset or have you seen any others?
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Offline tony_ack

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Re: MFA MPG
« Reply #6 on: 16 February 2011, 07:23 »
Could be the speed sensor if you're not getting the average speed or distance travelled either
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1995 VW Corrado VR6

Offline SoundillusioN

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Re: MFA MPG
« Reply #7 on: 16 February 2011, 11:45 »
Quote from: tony_ack on 16 February 2011, 07:23
Could be the speed sensor if you're not getting the average speed or distance travelled either

True, there was no mention of that working either.
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Offline Mitching

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Re: MFA MPG
« Reply #8 on: 16 February 2011, 13:34 »
Yeah, distance is some random 4 digit number, MPH reads 1.0 even on the motorway and MPG dones't work either.
Will check that out too then, as well as the vacuum hoses.
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Offline Mitching

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Re: MFA MPG
« Reply #9 on: 16 February 2011, 14:47 »
Where can I find the speed sensors?
Can't find anything in the haynes  :embarassed:
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