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[Mk2] [Turbo] Bouncing speedometer

 
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Tsia
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1995 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Sun Nov 05, 2017 5:04 pm    Post subject: [Mk2] [Turbo] Bouncing speedometer Reply with quote Reply with quote including images

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 [Laughing]

I can get a video up at some point if necessary.
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pbmr2
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PostPosted: Sun Nov 05, 2017 10:39 pm    Post subject: Reply with quote Reply with quote including images

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?
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Tsia
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1995 Toyota MR2 Mk2 Turbo Rev3

PostPosted: Sun Nov 05, 2017 10:41 pm    Post subject: Reply with quote Reply with quote including images

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 [Think]
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platmatt8
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1993 Toyota MR2 Mk2 Turbo Rev2

PostPosted: Fri Nov 24, 2017 11:13 pm    Post subject: Reply with quote Reply with quote including images

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