[Mk2] [Turbo] Bouncing speedometer

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Tsia
Posts: 1569
Joined: Fri Sep 23, 2011 9:12 pm
Location: Milton Keynes

[Mk2] [Turbo] Bouncing speedometer

Post by Tsia »

Hi guys,

My speedometer is almost perfect, except for the fact that it'll sometimes jump up a few MPH. I'll be cruising at say 40, then every few minutes or so, without accelerating, it'll jump to 60+ and fall straight back down to 40 again. It's a Rev 3 turbo (originally NA, swapped to a rev 3 turbo engine 10 years or so ago).

Ideas? It's hardly the end of the world, but still a PITA :lol:

I can get a video up at some point if necessary.
pbmr2
Posts: 929
Joined: Fri Jun 18, 2010 12:49 pm

Re: [Mk2] [Turbo] Bouncing speedometer

Post by pbmr2 »

As it's converted, could you look at the gearbox and see if it's a cable or digital speed sensor?

What year is the chassis?
Tsia
Posts: 1569
Joined: Fri Sep 23, 2011 9:12 pm
Location: Milton Keynes

Re: [Mk2] [Turbo] Bouncing speedometer

Post by Tsia »

Chassis is 1995, rev 3 turbo engine so it must be of similar times. Although at this point I'm unsure if it has a turbo or NA gearbox :-k
platmatt8
Posts: 2113
Joined: Sun Sep 10, 2006 8:41 pm
Location: Blackburn (Home of the mighty Rovers)

Re: [Mk2] [Turbo] Bouncing speedometer

Post by platmatt8 »

Check there’s no water in the gearbox sender plug/socket and that cables are I good repair.
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