Speedometer

[humpy]

On the way home I was passing a 30mph speed camera and took a look at the speedo to check. I was quite surprised to see an indicated 120mph! Needless to say the speedo was somewhat 'out'. A bit further up the road I managed an indicated 200mph, which must be an unusual event - even in a 2.5 GTO The speedo was jumping about 120 - 200 - 120 - 200, then after 5 mins it seemed to settle back to normal. Apart from the fact that there's a better than even's chance it knackered - any bright ideas?

H

[Inflict]

Hey there humpy,

Mine has done this a few times over roughly 4 months of ownership. It seems to occur after I've washed the car extensively, I think its pressure washing under the wheel arches that does it. I'm pretty sure the sensor is round about that area. Usually after things dry out it works again fine. This could be complete superstition or plain shit but anyway thought I'd offer what I knew!

Edited by Inflict on Tuesday 24th October 00:52

[M400UK]

speedo sensor is located on the passenger front wheel, its most likely that which is causing the problem.

[obes]

Sensor might be on top of the gearbox in yours mate, the older ones were atop the diff. Although it does sound like the wet wheel problem

[GTO400]

Thought only 6 speed cars have the sensor in the front wheel hub, 5 speed cars have the sensor in the gearbox l think.
Possible speedo fault

[steve f]

so thats why you lot think you have got fast cars even ferrari electrics aint that bad

[l6nex]

Think you'll find they are just as bad!! my 360 was back 11 times for electrical faults and my 355 done nothing blow fuses everytime it was washed!!!

[AMG Merc]

Here we go again...

[alex s]

Owen is right, on the five speed it is on the gearbox...I would check the wiring as a bad/loose conection can do this, also remember when it is registering 200mph the miles are going on at that speed!! Mine had this problem on the way back from the owners day at Rockingham in 2004, and the 100 mile odd trip home put nearly 1500 miles on the clock.

[steve f]

AMG Merc said:

Here we go again...

great fun isnt it

[twerlie]

steve f said:

AMG Merc said:

Here we go again...

great fun isnt it

Just noticed on your profile picture that you have painted your car Ferarri Red...!

[humpy]

alex s said:

Owen is right, on the five speed it is on the gearbox...I would check the wiring as a bad/loose conection can do this

Thanks - Mine's a 5 speed. I'll have a look, realise I havn't a clue what I'm looking for and then get Gary to sort it

alex s said:

when it is registering 200mph the miles are going on at that speed!!

that's not good at all!