cruise control

Joined: 19 Mar 2003 Location: Sunshine State

Hey all.

I need some advice about my crusie control

. It's the Command model shown in the pic.

My problem is it won't set to anything higher than about 103 kph. I called a few people and they said that's the way they are made. That's no good for long drives and 110 k zones. Any help about getting it to set at 110 k would be great.

Thanks.

It's running on a 97 GQ 4.2 Diesel.
Also it's a Vacuum style Cruise Control system.

Joined: 09 Nov 2002 Location: Traralgon Vic Aust.

If it is simular to Roscta (sp) c\cont units there will be a gain setting for speed control. On Roscta type there is switchs under a panel in the control unit. These change how the unit operates. If you have the install instructions it may tell you how to set this.
Does the cruise set a low speed, like 10-30km\h. If it does then the gain setting is on low. If it dosn't there may be a fault with the unit.

Joined: 11 Jan 2004 Location: Adelaide

Where's the vacuum come from? In a petrol engine it uses manifold vacuum to supply the control unit, but I wouldn't have thought a diesel could get the same vacuum. Is it possible that the engine just doesn't generate enough vacuum above 103 km/h?

Joined: 09 Nov 2002 Location: Traralgon Vic Aust.

We normally fit stepper motor type cruise to diesel, but have fitted vac type for cost reasons. Most vac pumps create enough vacuum to operate if in good condition.

Joined: 19 Mar 2003 Location: Sunshine State

Ok, it's a diesel. The Actuator has a Vacuum hose coming out of it joining onto a line that comes from a small black barrell on the passenger side, back corner of the engine bay. Sorry to sound like a newbie, but this is my first Patrol and I'm still learning what and where everything is. It's a big difference from the little zook.

I hope that makes sense.

cheers

This is not my engine bay. But you can see the barrell I am talking about in the top right of the pic. It's mounted to the inner guard.