Speedo is out

[Tj2001]

Recently took my 2004 VY into the mechanics to fix a few things and get a service. Upon getting it back, I’ve noticed when I’m driving with maps on, the maps read my speed as 6-7kms over what my Speedo says. Before I took my car in the speedo and maps speed matched. I initially thought the maps may have been wrong, but I’ve noticed when driving on the freeway (110km/h) my car says I’m doing 103 when I’m driving behind people, going the same speed as them. When there’s no one in front of me and I’m doing what my car says is 110, I’ve noticed I’m overtaking a lot of people. Is recalibrating your Speedo an easy fix, or do I need to take it in somewhere?

 

[krusing]

Yes, it’s an easy fix,
Just need a high end scan tool,

Has the Diff been replaced?,
it’s possibly has a different ratio in it now, hence the speedometer is out.

Do you know the current ratio installed ?, it’s usually on a label on the right hand side of the diff housing.
What size tyres you running ?
As I have a listing of the standard PPK settings

If your local to me, I can change it if you like..

 

[Tj2001]

Yes, it’s an easy fix,
Just need a high end scan tool,

Has the Diff been replaced?,
it’s possibly has a different ratio in it now, hence the speedometer is out.

Do you know the current ratio installed ?, it’s usually on a label on the right hand side of the diff housing.
What size tyres you running ?
As I have a listing of the standard PPK settings

If your local to me, I can change it if you like..

Oh I deffs don’t have a scan tool
The mechanic just changed the fuel injector and oil as I had fuel running through my oil. I also got 4 new Tyers put on before I went to the mechanic, all 16’s like my old set were. Diff hasn’t been touched to my knowledge

 

[krusing]

What size tyres you running ?

 

[krusing]

Oh I deffs don’t have a scan tool
The mechanic just changed the fuel injector and oil as I had fuel running through my oil. I also got 4 new Tyers put on before I went to the mechanic, all 16’s like my old set were. Diff hasn’t been touched to my knowledge

Change the fuel injector,
as you had Fuel running through your oil?