Cruise control how hard to convert?

[layback40]

Originally Posted by turbovm

Thanks guys I take it the factory cruise control doesn't work so well anyway and could be more drama than its worth.

The factory one is fine. My older one has it & has been no real problems.
Many aftermarket ones are a problem as they need vacuum to work their actuator. You would need to have it work on the peddle as its drive by wire.

[Redemptioner]

Originally Posted by layback40

The factory one is fine. My older one has it & has been no real problems.
Many aftermarket ones are a problem as they need vacuum to work their actuator. You would need to have it work on the peddle as its drive by wire.

Well that's no true, anything on a vacuum actuator will never be as good as an electrical one and the XJ had a vacuum one so......

The aftermarket ones come in Vacuum or electric, I recommend buying the electrical one every time as it has far more resolution for control. Also the control algorithms are far better on the aftermarket ones and will only get better with time, the factory ones uses some pretty basic preset settings, if you change anything on the jeep (exhaust, tires, towing, more weight etc) then the factory one will not work so well.

The controller for mine is wireless and is built into the gear lever (not easy to find), I find this setup to be much more convenient than the steering wheel one (don't need to look down) and outperforms a stock CC every time.

[layback40]

Originally Posted by Redemptioner

Well that's no true, anything on a vacuum actuator will never be as good as an electrical one and the XJ had a vacuum one so......

The aftermarket ones come in Vacuum or electric, I recommend buying the electrical one every time as it has far more resolution for control. Also the control algorithms are far better on the aftermarket ones and will only get better with time, the factory ones uses some pretty basic preset settings, if you change anything on the jeep (exhaust, tires, towing, more weight etc) then the factory one will not work so well.

The controller for mine is wireless and is built into the gear lever (not easy to find), I find this setup to be much more convenient than the steering wheel one (don't need to look down) and outperforms a stock CC every time.

Do you have any experience with the Bosch EMU systems used on the VM diesel XJ's? I see you dont drive a XJ diesel. In particular the later 92 pin EMU?

The best an aftermarket CC could do is to be connected some how, via a mechanical device to the accelerator peddle as there is no other way an aftermarket CC could input. If you look at the design of the peddle, you would see that it doesnt lend itself to having an electrical actuator attached. I actually have a car (Mercedes) that has an electrical actuator CC ~ VDO & its original equipment. The Bosch system on the jeep is much better.

The aftermarket CC would need its own speed detection, something else to get damaged while in the bush as they normally just have magnets on the tail shaft & a sensor near by.

Can you name a brand & model of CC that would fit & work well with the XJ VM diesel?

[Redemptioner]

Originally Posted by layback40

Do you have any experience with the Bosch EMU systems used on the VM diesel XJ's? I see you dont drive a XJ diesel. In particular the later 92 pin EMU?

The best an aftermarket CC could do is to be connected some how, via a mechanical device to the accelerator peddle as there is no other way an aftermarket CC could input. If you look at the design of the peddle, you would see that it doesnt lend itself to having an electrical actuator attached. I actually have a car (Mercedes) that has an electrical actuator CC ~ VDO & its original equipment. The Bosch system on the jeep is much better.

The aftermarket CC would need its own speed detection, something else to get damaged while in the bush as they normally just have magnets on the tail shaft & a sensor near by.

Can you name a brand & model of CC that would fit & work well with the XJ VM diesel?

You are correct, never had a diesel, but I also take it you have not installed many CC's .

The AP500 with your choice of controller works really well. No need to hook it up to the pedal, this is done at the throttle body (same as OEM so you have to do this either way as XJ's are not fly by wire). If you have a manual then you need a clutch switch, you can add one to the pedal or you will probably find there is already a clutch switch on the clutch so you just need to tap into that ($0.60 item to achieve this). You will need some sort of speed sensor input from somewhere, again this is just a matter of tapping into the already existing speed sensor on your transmission (another $0.60), magnet speedo setup is for vehicles with a mechanical speedo so no need to worry there. You can also tap into the coil ( or one of the other options like the crank sensor) to get engine revs and add over-rev protection (yet another $0.60) but this is completely optional.



Then you just have to choose from the 5 different options for the controller and bingo working. The aftermarket ones don't hunt as much as the original ones, you can set the power off/on based on revs etc unlike the OEM ones, it will automatically adjust to the changes you make to the vehicle, blah blah blah, better all round.


I hazard a guess the aftermarket ones are cheaper too

[jaffazoom]

Not having driven a diesel xj I have to admit I agree with Redemtioner on a good aftermarket Cruise control. Look up Rosta Cruise controls. They do a lot of types but electric actuator rather than vacuum is best.

With the universal ones you can set how aggressive they are and can avoid a lot of shifting. (my xj only has to see a hill and its banging down the gears and charging up any incline).

I'm going to fit one to my diesel conversion with mechanical pump.

aren't the late factory diesel xj's are drive by wire so I'm not sure if an aftermarket CC would fit up other than connecting to the accelerator pedal itself.
You can get aftermarket CC that read the gearbox speed sensor so you don't have to fit magnets etc as mentioned.

[Redemptioner]

Originally Posted by jaffazoom

Not having driven a diesel xj I have to admit I agree with Redemtioner on a good aftermarket Cruise control. Look up Rosta Cruise controls. They do a lot of types but electric actuator rather than vacuum is best.

With the universal ones you can set how aggressive they are and can avoid a lot of shifting. (my xj only has to see a hill and its banging down the gears and charging up any incline).

I'm going to fit one to my diesel conversion with mechanical pump.

aren't the late factory diesel xj's are drive by wire so I'm not sure if an aftermarket CC would fit up other than connecting to the accelerator pedal itself.
You can get aftermarket CC that read the gearbox speed sensor so you don't have to fit magnets etc as mentioned.

Thought fly by wire did not come in till 2005 for the GC which makes it a later model than XJ...
EDIT: in the petrol model, real jeep owners don't drive diesels anyways.

[jaffazoom]

Originally Posted by Redemptioner

Thought fly by wire did not come in till 2005 for the GC which makes it a later model than XJ...

99% sure the updates (well at least the 2000-01)
have mechanical pump with full electronic control and hence no accelerator cable but fly by wire. I'm pretty sure I remember someone on here even having problems with the accelerator unit. As always happy to be proved wrong