MFA mpg after changing clocks

[marf497 0]

I put new clocks in my 2l 16v (9a) as my old clocks where VR clocks my new clocks work great except the MPG is miles out showing about 15mpg had a search and seen posts about a vacuum pipe on the back of the clocks. When i removed my old clocks(mpg was ok on them) i didn't see any vacuum pipe ive had my clocks out and can't find this vacuum pipe is this pipe only on VR6's?? or should it be their ive removed the bottom cover under the steering column at the pedals and still cant see this pipe. Any ideas would be apreciated.

[VR6 0]

The VR doesn't use a vacuum pipe as it takes an electronic feed. Should be a purple wire for the VR clocks to work with correct MPG.

 

What are the clocks that you've put in from?

[marf497 0]

16v clocks i only changed them as my revs where reading a lot lower than they should be i'm going to change them back tomorrow and see if my mpg is ok just can't see this vacuum pipe anywhere. not sure if it is used on my mine its a 1994.

[marf497 0]

put my old clocks back in and my mpg on the mfa are ok now no vacuum pipe connected. Tried swapping over the dial for the revs as the spacing was different but still showed low.