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The mkiv Supra Owners Club

Strange happening with my speedo


Stratty

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Hi guys

 

I am hoping you can help me solve a little problem with my speedo.

 

I had an NA-TT conversion done a few weeks ago and the problem has only happened since then.

 

When I put my foot down, the speedo climbs as normal but as soon as the 2nd turbo cuts in, the speedo goes flying around to about 140mph (when I am only doing 50mph).

 

It looks more like a boost gauge rather than a speedo.

 

I hope this makes some sense as it's quite hard to explain without seeing it.

 

Any ideas?

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Maybe you think your doing 50mph, But really that 2nd turbo is pushing you too 140mph.

 

Pushing that comment to one side, Mine did this when i first fitted the kph / mph and delimmiter converter, Fixed it by re doing the wire joints. When you go NA - TT is there any wiring on the Speedo / Dash side that might no be brillient ?

 

Just an idea? ;)

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i had the same problem duo to a cheap ebay km/mls convertor.

changed to a good one and problem solved.

 

I have had the converter on it since I bought it over 3 years ago and have never had a problem with it.

 

Might be an idea just to change it for a better one like you say and see what happens.

 

Where did you get yours?

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  • 3 months later...
I have had the converter on it since I bought it over 3 years ago and have never had a problem with it.

 

Might be an idea just to change it for a better one like you say and see what happens.

 

Where did you get yours?

 

did you manage to get to the bottom of this? i've a similar fault, up to about 70 it reads ok anything above that 80-100 reads 140mph

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