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Mpg light turns on intermittently

Posted: Wed Dec 20, 2017 5:47 pm
by Oyo
Hey guys- my mpg light is turning on after a year of driving my Rocco - 1984

It's a bit of a distraction and I can't suss out what it is trying to tell me

It occurs at random, whike in different gears - pressing on or off the gas and various revs ..

Any suggestions ?

Thanks :)

Re: Mpg light turns on intermittently

Posted: Wed Dec 20, 2017 8:28 pm
by mark1gls
The light is telling you to change gear. Have you tried changing gear to see if it goes off?

I’ve got a couple of strange electrical problems which sometimes seems to fix themselves and work for a couple of months then stop working again, perhaps you have this sort of fix/problem?

Re: Mpg light turns on intermittently

Posted: Wed Dec 20, 2017 11:28 pm
by Oyo
mark1gls wrote:The light is telling you to change gear. Have you tried changing gear to see if it goes off?

I’ve got a couple of strange electrical problems which sometimes seems to fix themselves and work for a couple of months then stop working again, perhaps you have this sort of fix/problem?

Thanks .. I am driving it as I have for the past year - I am up and down the gears all the time - as mentioned changing the gears doesn't stop it, nor does taking the foot off the gas etc.

guess it's another of those bizarre electrical nuances that reawaken after 33 years - sounds just like you mention- reckon it will go just like it arrived ! :)

Re: Mpg light turns on intermittently

Posted: Thu Dec 21, 2017 8:27 pm
by the edmundator
It shouldn't ever light up in 5th. It's controlled by the vacuum system, I think, so worth checking the condition of all the vacuum hoses.