Wazzajnr
Well-Known Member
OK, I've replaced all the hoses and the cruise control now works....... Of a fashion.
Problem is that the speed control is pretty poor. On a level road set at 70mph, it will slow down to about 67 then accelerate to about 72, rinse and repeat, ad infinitum.
Now, I'm a controls engineer and deal with tuning PID controllers on a daily basis so I'm sure I could tune it far better than this.
Looked at nanocom and there is a facility to select different "vehicle tune" I've tried a couple of different ones (disco II 4.0, ECU default and 4.6 engine) all of these produce different results so have an effect but if I try to select P38 4.0 it says "no data" and nothing changes.
Now, my questions are.
1. Does anyone know how to get it to select P38 4.0
2. Does anyone know if you can set your own values for PID parameters.
3. Does anyone else have this poor speed regulation, if so, any suggestions for a fix beyond what I've suggested?
It's pretty heavy on juice at the best of times but my estimate is that this makes it 20% worse not to mention how annoying it must be for anyone following at a similar speed!!
All suggestions gratefully accepted, apart from a match and a gallon of petrol!!
Problem is that the speed control is pretty poor. On a level road set at 70mph, it will slow down to about 67 then accelerate to about 72, rinse and repeat, ad infinitum.
Now, I'm a controls engineer and deal with tuning PID controllers on a daily basis so I'm sure I could tune it far better than this.
Looked at nanocom and there is a facility to select different "vehicle tune" I've tried a couple of different ones (disco II 4.0, ECU default and 4.6 engine) all of these produce different results so have an effect but if I try to select P38 4.0 it says "no data" and nothing changes.
Now, my questions are.
1. Does anyone know how to get it to select P38 4.0
2. Does anyone know if you can set your own values for PID parameters.
3. Does anyone else have this poor speed regulation, if so, any suggestions for a fix beyond what I've suggested?
It's pretty heavy on juice at the best of times but my estimate is that this makes it 20% worse not to mention how annoying it must be for anyone following at a similar speed!!
All suggestions gratefully accepted, apart from a match and a gallon of petrol!!