Cruise malfunction

Gate Keeper · 9th September 2012, 07:06

Whilst driving up the M6 cruise light flickered on the IPK and the engine speed dropped to 48 mph. I did a reset to 55 mph but it would drop back to 48 mph. Then it would accelerate +++ until I hit the brakes. I ended up with it switched off.

Any ideas?
Thanks

kaiser · 9th September 2012, 07:16

No Idea.
But part of the system is mechanical. It is situated next to the throttle body, and incorporates a bellow and an adjustable rod in a plastic holder. The rod can be moved in the holder to provide the right amount of travel. Usually it has been painted originally where it was adjusted.
I would, as a first port of call, check here to see that there is no mechanical interference, and all connections are OK.
Then I would check the speeder cable and its free travel and lastly that no carpets or mats are interfering, which I doubt.

If that does not work, then you have an electrical problem.

If you can't fix a problem with a hammer, then it is usually electrical.

Gate Keeper · 9th September 2012, 08:06

Thanks Kaiser. I will look for the connections first and see. Just to remind you - let me know if u need parts as I am due back to ZA soon also a member has Rover car badges made to order and if you need any new ones let me know

Simon.h · 9th September 2012, 08:15

Hi Gate Keeper,
Have a look at the Vacuum pipe and the actuator (i think it called that) on the throttle body.

Gate Keeper · 10th September 2012, 08:53

Thanks Simon. I will look into that as well. I did check the adjusting rod and found there was hardly any play in it. I am just about to set off to Newcastle via the lakes. I won't need C C here but would be handy to have it back again for the drive back to London and I am wondering if it needs to be working for the MOT?

rover54 · 10th September 2012, 09:33

Its not an MOT feature and not having it working does affect safety. I know you have your car looked after by somebody and you are not that far away, if he needs to borrow a T4 to look at your CC just let me know. It is here to be used.

Gate Keeper · 10th September 2012, 14:32

Thanks Ed

No more problems noted with C C on drive over. I am seeing a member this afternoon who has a T1 and a T4 in Newcastle and as a point of safety I will ask him to look at it. I have not had any warning lights and I will come back to you if I need your help when I am down your way. Thanks for that

Phil

rover54 · 10th September 2012, 15:34

Now let me guess who that is. I think he hold claim to 4 T4's and a T1. Phil, it is here to be used and not gathering dust and it is a no charge service.

Phil-T4 · 10th September 2012, 16:51

Problem is ED, Phil's car is too old for a T4 but i have feeling Brian's T1 will have better results

Gate Keeper · 10th September 2012, 21:41

The car is very old and the 16 pin socket turned out to be of a non standard design. I think that Rover just put together what they happened to have at the time to make up a connector. It had to be opened up as even T1 was failing to communicate. One pin was found to be compressed and the other pins needed emery paper - a lot of jiggery pokery with T1 various connectors, software discs and eventually T4 did do the talking with ZCS. The instrument panel also had a problem. We discovered the VIS has packed up completely. What was strange was that the CC had not been enabled even though it had been working of sorts. The new light module and the other ECU's are all singing the same VIN tune. We are not quite there and will resume tomorrow

9th September 2012, 07:06	#1
Gate Keeper This is my second home 4X4 Join Date: Jul 2010 Location: Nairobi Posts: 20,072 Thanks: 8,286 Thanked 7,017 Times in 4,160 Posts	Cruise malfunction Whilst driving up the M6 cruise light flickered on the IPK and the engine speed dropped to 48 mph. I did a reset to 55 mph but it would drop back to 48 mph. Then it would accelerate +++ until I hit the brakes. I ended up with it switched off. Any ideas? Thanks

9th September 2012, 08:15	#4
Simon.h This is my second home Previously owned- MG ZT V6 160 Y plate Lpg, MG ZT 190 2003 In Rare Celestial Factory Ordered Lpg MG Join Date: Mar 2010 Location: Calne Posts: 4,531 Thanks: 8 Thanked 116 Times in 108 Posts	Hi Gate Keeper, Have a look at the Vacuum pipe and the actuator (i think it called that) on the throttle body. __________________ Previously owned- MG ZT V6 160 Y plate Lpg, MG ZT 190 2003 In Rare Celestial Factory Ordered Lpg MG ZT 190 2004 lpg

9th September 2012, 07:16	#2
kaiser This is my second home 75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007 Location: Johannesburg ZA Posts: 6,200 Thanks: 1 Thanked 859 Times in 613 Posts	No Idea. But part of the system is mechanical. It is situated next to the throttle body, and incorporates a bellow and an adjustable rod in a plastic holder. The rod can be moved in the holder to provide the right amount of travel. Usually it has been painted originally where it was adjusted. I would, as a first port of call, check here to see that there is no mechanical interference, and all connections are OK. Then I would check the speeder cable and its free travel and lastly that no carpets or mats are interfering, which I doubt. If that does not work, then you have an electrical problem. If you can't fix a problem with a hammer, then it is usually electrical.

9th September 2012, 08:06	#3
Gate Keeper This is my second home 4X4 Join Date: Jul 2010 Location: Nairobi Posts: 20,072 Thanks: 8,286 Thanked 7,017 Times in 4,160 Posts	Thanks Kaiser. I will look for the connections first and see. Just to remind you - let me know if u need parts as I am due back to ZA soon also a member has Rover car badges made to order and if you need any new ones let me know

10th September 2012, 08:53	#5
Gate Keeper This is my second home 4X4 Join Date: Jul 2010 Location: Nairobi Posts: 20,072 Thanks: 8,286 Thanked 7,017 Times in 4,160 Posts	Thanks Simon. I will look into that as well. I did check the adjusting rod and found there was hardly any play in it. I am just about to set off to Newcastle via the lakes. I won't need C C here but would be handy to have it back again for the drive back to London and I am wondering if it needs to be working for the MOT?

10th September 2012, 09:33	#6
rover54 Retired rover 75 v6 Auto Conn. SE 54 plate LPG and 2006 Rover 75 v6 Auto LPG , 1.8 r75 Manual Join Date: Aug 2010 Location: London Posts: 3,379 Thanks: 0 Thanked 6 Times in 6 Posts	Its not an MOT feature and not having it working does affect safety. I know you have your car looked after by somebody and you are not that far away, if he needs to borrow a T4 to look at your CC just let me know. It is here to be used.

10th September 2012, 14:32	#7
Gate Keeper This is my second home 4X4 Join Date: Jul 2010 Location: Nairobi Posts: 20,072 Thanks: 8,286 Thanked 7,017 Times in 4,160 Posts	Thanks Ed No more problems noted with C C on drive over. I am seeing a member this afternoon who has a T1 and a T4 in Newcastle and as a point of safety I will ask him to look at it. I have not had any warning lights and I will come back to you if I need your help when I am down your way. Thanks for that Phil

10th September 2012, 15:34	#8
rover54 Retired rover 75 v6 Auto Conn. SE 54 plate LPG and 2006 Rover 75 v6 Auto LPG , 1.8 r75 Manual Join Date: Aug 2010 Location: London Posts: 3,379 Thanks: 0 Thanked 6 Times in 6 Posts	Now let me guess who that is. I think he hold claim to 4 T4's and a T1. Phil, it is here to be used and not gathering dust and it is a no charge service.

10th September 2012, 16:51	#9
Phil-T4 I really should get out more....... MG ZT-T, Rover 75 Tourer Join Date: Mar 2011 Location: Olney Posts: 2,969 Thanks: 245 Thanked 1,088 Times in 657 Posts	Problem is ED, Phil's car is too old for a T4 but i have feeling Brian's T1 will have better results

10th September 2012, 21:41	#10
Gate Keeper This is my second home 4X4 Join Date: Jul 2010 Location: Nairobi Posts: 20,072 Thanks: 8,286 Thanked 7,017 Times in 4,160 Posts	The car is very old and the 16 pin socket turned out to be of a non standard design. I think that Rover just put together what they happened to have at the time to make up a connector. It had to be opened up as even T1 was failing to communicate. One pin was found to be compressed and the other pins needed emery paper - a lot of jiggery pokery with T1 various connectors, software discs and eventually T4 did do the talking with ZCS. The instrument panel also had a problem. We discovered the VIS has packed up completely. What was strange was that the CC had not been enabled even though it had been working of sorts. The new light module and the other ECU's are all singing the same VIN tune. We are not quite there and will resume tomorrow