Cruise Control Hunting

Dorset VogueSE

Well-Known Member

Posts

1,259

Location

In the petrol station - thanks to the supercharger

• Nov 15, 2007

• #1

Guys,

when in lazy comfort mode, cruise engaged, wafting down the motorway, I noticed that the speedo seems to vary by about 5mph. The car slows, gets a bootful of juice from the cruise system, goes too fast then starts all over again. Had the displeasure of driving a company Vulvo the other day. The speedo on that was rock steady with cruise on.

Do the RR symptoms above seem normal to you guys or is it possible I have a vacuum leak or similar

 

Sirus

Your all Banned except me

Posts

22,196

Location

The Country of Black

• Nov 15, 2007

• #2

Hills

 

Dorset VogueSE

Well-Known Member

Posts

1,259

Location

In the petrol station - thanks to the supercharger

• Nov 15, 2007

• #3

No, on the straight level sections. Forgot to mention, it's a P38

 

S

slob

Well-Known Member

Posts

22,488

Location

Harrogate or London

• Nov 15, 2007

• #4

could be yer have a small vacumm leak, if yer CC is vaccummmm operated a small leak could lead to symtoms yer describe

 

R

redrange

New Member

Posts

846

• Nov 15, 2007

• #5

Dorset VogueSE said:

Guys,
Do the RR symptoms above seem normal to you guys or is it possible I have a vacuum leak or similar

Click to expand...

i would say you have a problem, went to south coast yesterday and mine was a solid speed regardless of inclines, not hills you understand!

 

wills

Well-Known Member

Posts

1,209

Location

Northamptonshire

• Nov 15, 2007

• #6

Sounds like the vacuum tubes are beginning to perish...

Cruise Control Problems and Solutions

Good luck!

-Wills

 

Dorset VogueSE

Well-Known Member

Posts

1,259

Location

In the petrol station - thanks to the supercharger

• Nov 15, 2007

• #7

Thanks Wills,

Will have a good look at the weekend when I can check it in daylight.

 

E

Ed Foster

New Member

Posts

121

Location

Oxfordshire, UK

• Nov 15, 2007

• #8

I've just replaced my vacuum tubes and on the flat keeps speed well but on downward inclines it does tend to speed up a small ammount and on upward grades sometimes accelerates a little past the set speed before slowing down to it....I did notice that the throttle cables are a little stiff (possibly in need of lubrication) could this be anything to do with it? Also the accelerator pedal is a bit stiff (but only slightly so).