20 replies to this topic

[mcbunny]

i was just wondering if the vx can be clocked with the stack display been digital or if it could be done by dealers etc

[adtmits]

i was just wondering if the vx can be clocked with the stack display been digital or if it could be done by dealers etc

Any car can be clock if you have the right tools.....

not sure if the VX is anymore prone to it than others....

Edited by adtmits, 03 July 2006 - 06:33 PM.

[CocoPops]

I wouldn't have thought so, it's a digital unit and they're supposed to be tamper proof aren't they?

[adtmits]

dunno but the clio can definitley be done with the right equipment.......

[mandarinvx]

I remember reading a post where a stealer had re-set the milage on a 'new' car - ie delivery miles. The post questioned the legality of them doing this. I think there was a limit as to how much can be lowered, like they may only be able to re-set at under 50 miles or something, but low and behold cant find the post now. A HPI check should indicate whether the car has been clocked - provided the owners/dealers entered milage on MOT's etc. Another sure sign is wear, worn carpets, seats etc should indicate the amount of milage on a car, and if they provide you with ten reciepts for sets of tires or anything like that

[mcbunny]

yeah i have heard about dealers doing it to reset test delivery mileage with a vx tho wear is hard to gauge imo seats wear fast with the way you have to get in and out etc

[paulf-cam]

yeah i have heard about dealers doing it to reset test delivery mileage

with a vx tho wear is hard to gauge imo seats wear fast with the way you have to get in and out etc

Isn't it as simple as changing the dash?

Ta, Paul.

[johnaachen]

yeah i have heard about dealers doing it to reset test delivery mileage

with a vx tho wear is hard to gauge imo seats wear fast with the way you have to get in and out etc

Isn't it as simple as changing the dash?

Ta, Paul.

No!

The mileage is stored in EEPROM (electrically erasable programmable read-only memory) memory in the ECU. This means that it's value is allowed to be changed and will still be present even if the ECU is switched off. This is contrast to ROM (Read Only Memory) which means you cannot change its value (e.g. circumference of tyre or pi) and RAM (Random Access Memory) e.g. the coolant temperature - when the ECU is switched off the value is lost. However with EEPROM when you switch the ECU off the data is not lost.

If you knew the memory location of the variable in the ECU then it would be very easy to "reset" it to zero...or start it at any other value you wished up to the maximum that can be stored for that amount of memory.

See! I am an Automotive engineer!!

PS playing with memory locations, changing values in ECUs (Calibration) is what I do......

[eddo]

See! I am an Automotive engineer!! Johnaachen Your cars a low mileage example isnt it? Ed

[slindborg]

John you dont happen to work for ford in southampton do you? we have all kinds of anti tamper software in the PCM that talks back to the cluster to confirm that the milage is correct on the new tranny. even i cant work out how to clock it back and i can look at the software lmao

[Richy]

Stack clocks can be ''clocked'' as already mentioned you just need the right software and a con man IT geek

[johnaachen]

See! I am an Automotive engineer!!

Johnaachen
Your cars a low mileage example isnt it?

Ed

Very!

That did make me laugh!!

@slindborg - no I work for Ricardo......

You need to use somethinng like INCA (if its Bosch software) and then you can access all the parameters in the ECU.....it depends what type of ECU it is though what type of claibration tool you can use....

[dw1]

It's mind boggling and cool finding out what people do to earn a crust out of niches in life. John - at least if your odomoeter goes wrong you'll be able to fix it! ducks for cpver.

[johnaachen]

It's mind boggling and cool finding out what people do to earn a crust out of niches in life.

John - at least if your odomoeter goes wrong you'll be able to fix it! ducks for cpver.

Swings at dw1 and misses!!

Probably not no! But I will know whats wrong with it at least!

[VIX]

My NA is on its 3rd Stack unit the first 2 clicked badly. At each replacement the mileage went back to zero (although I made a point of having the correct mileage noted in the log book). I was told that there was no way for the correct mileage to be picked up by the replacement Stack unit even assuming it is stored in the ECU.

[johnaachen]

My NA is on its 3rd Stack unit the first 2 clicked badly. At each replacement the mileage went back to zero (although I made a point of having the correct mileage noted in the log book). I was told that there was no way for the correct mileage to be picked up by the replacement Stack unit even assuming it is stored in the ECU.

Then the calculation/memory must be made in the stack rather than in the ECU....I stand corrected!

[patnkat]

I have just turned to 75000miles on my VX and hope to keep up the flawless Vauxhall service history. Its not just the display that needs to be altered. Im not going to get repairs done by Vauxhall but at least it helps to the HPI check and any mileage check. ANY computer system can be broken and any vehicle mileage altered! Keep receipts and service history.DONT jsut trust a display Paul

[paulf-cam]

Then the calculation/memory must be made in the stack rather than in the ECU....I stand corrected!

[slindborg]

@slindborg - no I work for Ricardo......

You need to use somethinng like INCA (if its Bosch software) and then you can access all the parameters in the ECU.....it depends what type of ECU it is though what type of claibration tool you can use....

Ahhhhh thats where ricardo are then
I work for the uber stable Visteon in diesel PCMs

Id guess that you might be able to have a crack at the Cluster with the KWP2000 protcol but i doubt it very much as there didnt appear to be a comms line on the wiring diagram when i was wiring a VX cluster into a nova (oh yes lol)

[medlow]

My NA is on its 3rd Stack unit the first 2 clicked badly. At each replacement the mileage went back to zero (although I made a point of having the correct mileage noted in the log book). I was told that there was no way for the correct mileage to be picked up by the replacement Stack unit even assuming it is stored in the ECU.

Same here... previous owner had the bad clicking problem and had the Stack unit replaced under warrenty. mileage to zero..
Vaux said they cannot clock the unit forward.

Luckily I have the document from Vauxhall stating what the mileage was before it went in for the repair, to avoid any confusion later on..

MED.