Is My mk2 MFA Trip computer broken?

Hi all

was driving my mk2 and after about 20min for driving looked at the MPG on the trip comp and it said 11.8 i know that this is well off for a 1.8 8v
i have been running it on super unleaded but this should make it do a better MPG?
is it doing a rubbish MPG or is it the Trip computer playing up? what else could be causing the problem?

 

i think you may have solved the mystery the clocks on the car atm are naff and i did notice the hose behind the dash but nowhere to put it. thanks mate

were would the vac hose be in the engine bay?

 

goes to the brake servo pipe from inlet manifold

 

Wouldn't you have astronimical mpg if the hose was disconnected?

 

I'm pretty sure if the hose comes off they read 99.9 mpg

 

the mpg has bee all over the place when i had a glans at it while driving it said 9.9 could have said 99.9 but i was driving wasn't paying attention to it

 

i think maybee the engine may run a little rough too if there was a vac leek,try this.locate where the vac pipe goes on the servo pipe, take the vac pipe off ,cover the hole up on the servo pipe,see if there is any difference how the engine runs like this compared to how it runs now,if theres no change the chances are the vac pipe is intact and the fault is on the unit on the clocks
thats the only way i can think of checking it,appart from getting a set of clocks and trying them

 

thanks i will try that when i can get it stared the immobilizer died on my yesterday
getting it sorted Tuesday thanks mate

 

just noticed you have a thread going about your alarm system,and youv disconnected your car battery,the mfa does reset itself after the battery has been disconnected ,and maybe you havnt drove long enuff for the mfa to work out its averages,long shot but worth considering

 

i haven't driven the car since the battery was disconnected i think the clocks a broken the rev jumps all over the place when you accelerate i thinks its just old and needs changing

 

one possibilty why the mfa is all over then,dont forget too when the rev counter (i assume you mean this and not the engine revs) is all over the place its a sign off the hall sender failing

 

its the clock pin a think the revs on the car sound fine just when i change gear the pin goose made but the engine revs stay the same putt another set of clock on it the other day revs were fine but the MPH and the fuel gauge didn't work on that set