gookah wrote:the high idle speed is not just incorrect adjustment of the new cable is it? holding the throttle sightly open?
Funny all this has happened after the install of a cable..
BladeRunner919 wrote:The TPS is easy to see working correctly in diagnostics. Mine went faulty and I could see in INPA that the output was inconsistent and 'jerky'. I assume the garage read the fault codes - what codes were present?
therealdb1 wrote:Surprised your garage has not come across this before as it is fairly common on all brands of cars with electronics attached to the throttle but then I guess replacement of a throttle body is not common and not something to be undertaken lightly due to the cost as you have discovered.
Zed Carer wrote:therealdb1 wrote: the electronics are only for the idle control valve and it was expected that this should just have reset to the original default values but it hasn't.
gookah wrote:Zed Carer wrote:therealdb1 wrote: the electronics are only for the idle control valve and it was expected that this should just have reset to the original default values but it hasn't.
the M52tu indeed has a hybrid control,..... yes its cable throttle, but its an electronically controlled motorised throttle too, The electronics are used to not only control the asc to shut the throttle on rear wheel traction loss, but also used for cruise control settings.
Idle control I believe is simply on off, and not variable.
All these problems seem to stem from a cable change.... I am very cynical how all these 'extra problems/spend required' are now present.,
NZ00Z3 wrote:Yes the ICV rattle is normal.
NZ00Z3 wrote:Suggest you start with the accelerator cable. Check that it is installed and adjusted correctly.
Have seem a incorrectly installed cable at the throttle body on a M52TUB25 cause a high idle issue. The cable had been installed incorrectly at the mounting for the throttle body.
Then check that it is adjusted correctly. Best done with an inspection camera or mirror to check that the throttle body butterfly is closing properly.
If all of this checks out, then do the EMC accelerator range calibration as suggested.
gookah wrote: All these problems seem to stem from a cable change.... I am very cynical how all these 'extra problems/spend required' are now present.,
therealdb1 wrote:Procedure is:
Turn off ignition for 30 seconds
Turn on ignition (do not start the engine)
Delete DME adaptions
Reset fault code memory
Press the throttle pedal fully to the floor 4 times
I cannot remeber if INPA actually confirms the adaptions have been reset but because you have a new throttle body fitted the ECU does not know where fully closed and fully open throttle positions are and that is what you are telling it with this procedure.
John Wilson wrote:I suppose its not something simple like the regular problems of a split in one of the boots on the inlet side which developed through being disturbed with the original work?
Zed Carer wrote:Thanks for the instructions. Whilst waiting to see if I can get free access to INPA I've resurrected my old works laptop - they forgot to ask for it back when I retired 6 years ago. So far deleted loads of files so should have circa 25 to 30GB free. Its running a 6 year old version of XP and I don't particularly want to connect to the internet as there is no up to date anti-virus software so I've been looking at This Not sure if there any others that you think might be better?
gookah wrote:my opinion is that after removing the throttle body to fit the cable, the round plug was not fitted correctly resulting in all the codes and problems, A subsequent refit of a new TB saw it connected properly. I know from experience that it is a pig to get at, plug in and rotate fully.
I have removed loads of these and had no problems afterwards.. so have many others..
The garage probably realised but did not want to say. I would be asking for the old TB back and testing it.
Zed Carer wrote:I've been looking at This
therealdb1 wrote:Zed Carer wrote:I've been looking at This
That is the sort of thing that you need. It is similar to what I have.
therealdb1 wrote:Any luck with your INPA?
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