As far as I am aware no such setting like that exists
Hi
Does anyone know if it's possible to reprogram the cruise control ratios on a mk4 astra?
I have change the gearbox to the six speed and all was working as normal. I have now replaced the sixth gear with a different ratio to reduce the revs but the downside of doing this is that the cruise control now only works in the first five gears :-( so I'm assuming there is a table in the ecu with a speed to rev limit and the new gearing is outside this
Dave
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As far as I am aware no such setting like that exists
YOu are correct, road speed by RPM calibration table is in the ECU Flash/Map.
You need a tuner who has access to a DAMOS file for your ECU so he can re-calibrate the maps.
Difficult to find someone willing to do this job as it is rarely required and you need a deep understanding of the internal ECU
structure, function and calibration logic.
To help you understand here is some explanation of the ME7 ECU from an Audi:
https://s4wiki.com/wiki/Tuning#Gear_detection
And here is a Bosch document (translated) explaining ECU calibration workflow and items:
http://files.s4wiki.com/docs/ME-7.3....dDataSheet.pdf
1327 pages long, so you can understand why good tuners charge so much for a remap.
Thanks for the info I'll have a look later
Is the map only accessible via a tech2 or are there any other systems to allow access
Dave
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No diagnostic tool can help you with this.
You need chip tuning tools.
You go about this as you would remaping.
Ok thanks
I've done remapping on my bikes but not on the car. What's the best interface/kit to get for the Vauxhall?
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Depends on your budget but i presume you are not willing to spend 4000€ for a genuine tuning tool.
Clones are a risk so have a failover plan (ability to recover from a failed flash with Tech2 or a tool that can recover bricked ECUs)
Galletto, MPPS, Alientech, all should be able to write GM ECUs.
You need an editing software, definition files (damos/A2L).... Best start googling stuff.
There is a long road infront of you if you decide to do this yourself.
You did not tell us which engine you have?
Hi
Thanks for the info
It's a z20let
Dave
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There are a few German damos nad. ols files floating around the internet for ME1.5.5 (Z20LET).
Just Google it, you will find them.
Diagnostics.org.uk is a trading name of RJP Projects Ltd which is a company registered in England and Wales with company number 7453778
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