I made an observation over the past 24 hours. Yesterday we had a run out of 125 miles along fast A roads and motorways along with a few slower A roads due to speed restrictions. The stop/start more or less packed up about 4 weeks ago, which I put down to short journeys and the DPF filter not having chance to regenerate properly. So after the run I expected the S/S to function correctly. No, it didn't. Today I got back in the car and for once did not connect the phone to the USB. The first journey there was no S/S working but coming back home it functioned every time. As I was near the dealer I was going to get it in to have it looked at. When it started working again I decided not to book it in. The question here is because I was so near the dealer and the car was parked within a few hundred yards from the dealer for around 40 minutes. Now can the car electronically link to JLR near a dealer and be checked over?? I don't know. Can the phone actually be blocking any updating if the acceptance of connection to JLR is not granted? Really strange situation that the S/S works faultlessly for weeks on end then just packs up. I have kept the battery topped up fully with a CTEK charger, so it is not battery related. The car should have cleaned the DPF on the first part of the larger journey at 63 miles. The only other thing I can think of was that I had the aircon on all the time but switched it out this morning. In the past the aircon made no difference whatsoever as long as the battery and DPF were 100%. Any thoughts again on the subject??
Stop/Start again a few thoughts
1 reading
Guest
G
- Status
61 - 80 of 899 Posts
G
Guest
·The regeneration stage releases the hydrogen from the gas mats in the cells which become clogged if allowed to dischrge regularly. The battery will seem charged under normal conditions and will work OK but after regeneration will accept and keep a higher charge better.jaguarnewbe said:
Joined
·
1,790 Posts
It will be some years before the damage caused to engines, where Stop/Start has been continually used, will become evident. I am absolutely certain in my own mind that an engine that is continously stopped and started is going to wear out much faster than one that is kept running.
Joined
·
986 Posts
I agree entirely. I'm lucky in this instance having a manual means I choose when to use it, mainly only for long traffic lights. Having a manual also means no need to worry about the damage and emissions caused by remote start :mrgreen:BOBCDP said:
A rare double win for the now extinct manual transmission in the XE!
I think it was your post at 10.47 am on Wednesday as it looked like the first part of the quote marks somehow got deleted so the whole post looked down to you. (now fixed)Vespa said:
Then you were quoted with a quote in the middle which made the quote wrong and then someone else quoted your original quote but because the original quote was wrong another quote then had two wrong quotes so people think your quote was you when it fact your quote should have been after the first quote so people would know it was someone else's quote and not your quote.
I'd try and fix it but it would be like herding cats and I'd probably get the quotes wrong when I was quoting other quotes.
I think the gist is there so please carry on.
I've now got a headache.
:mrgreen:
EDIT: I think it's now fixed and makes sense.......................well, sort of.
But don't quote me.
:lol:
G
Guest
·Thanks. More quotes than "quirkys" in BBC secondhand junk selling programmes (Antiques) :lol: :lol:
G
Guest
·Well it's 7 days since the update and the remote and S/S packed up again. I decided that after totalling up the mileages for this week and basically not hardly using the car that the battery management is very sensitive to systems being shut down to prorect the starting charge. I reckon that my total mileage for the week is too low to actually get these systems to stay live. I have actually only done 20 miles all week !!!
I reckon the car has had 90 mins of running out of 10,080 mins for the week. It has to lose charge at that rate. I charged it yesterday and it took 5 hours. That works out around 1 hour per day taking in to account the driven times. Any other car with none of these fancy systems, would never have given any inkling of a low charge and started as normal the same as my XE. Thinking back to the VW I had, I sometimes had a warning flash up to start the engine as the batery charge was low. Similar winter driving conditions when I retired. The car before was my beloved Rover 45V6 that never failed me but was driven daily at least 40 miles or so to work. Did I buy the wrong car this time?? No bloody way I love it and I have got to grips with all it's foibles (or I think I have).
I reckon the car has had 90 mins of running out of 10,080 mins for the week. It has to lose charge at that rate. I charged it yesterday and it took 5 hours. That works out around 1 hour per day taking in to account the driven times. Any other car with none of these fancy systems, would never have given any inkling of a low charge and started as normal the same as my XE. Thinking back to the VW I had, I sometimes had a warning flash up to start the engine as the batery charge was low. Similar winter driving conditions when I retired. The car before was my beloved Rover 45V6 that never failed me but was driven daily at least 40 miles or so to work. Did I buy the wrong car this time?? No bloody way I love it and I have got to grips with all it's foibles (or I think I have).
Joined
·
347 Posts
Yesterday I had some time to try things out in various stop start scenarios.
After a 100 mile run, so the battery should be up to charge and the car fully up to temp stop/start still refuses to work in Normal mode. Just as an experiment I decided to flip to eco mode, well I wasn't going to get over about 10 mph anyway. Lo and behold stop/start working fine. I concluded that in eco mode it limits the load on the engine/battery by stopping the air con etc working so hard?
Didn't last long as I got fed up with the car stopping every few seconds so I went back to normal mode :roll:
After a 100 mile run, so the battery should be up to charge and the car fully up to temp stop/start still refuses to work in Normal mode. Just as an experiment I decided to flip to eco mode, well I wasn't going to get over about 10 mph anyway. Lo and behold stop/start working fine. I concluded that in eco mode it limits the load on the engine/battery by stopping the air con etc working so hard?
Didn't last long as I got fed up with the car stopping every few seconds so I went back to normal mode :roll:
Didn't I hear that eco switches off the aircon completely?
That could tie in with the thought that anything that needs the engine running will kill stop start.
It was mentioned some time back that until the temp set in the car is reached then it won't work either as that overrides stop start.
That info came from a Jag Techie.
That could tie in with the thought that anything that needs the engine running will kill stop start.
It was mentioned some time back that until the temp set in the car is reached then it won't work either as that overrides stop start.
That info came from a Jag Techie.
Joined
·
476 Posts
Mine has been in today to sort out the high idling revs and for the recently prescribed bench test on the battery in relation to the Stop/Start hibernation. The test has resulted in a new battery being fitted; so once they return the car tomorrow after completing the fuel adaption run, I'll let you know how long stop/start continues to work with short journeys, A/C constantly on and no charging facility.
Joined
·
329 Posts
My Stop/Start has been given a good workout the past two days.
Yesterday after about 7 or 8 long stops in a pretty short space of time, the Stop/Start finally gave up. No surprise really as it was running on battery only for a majority of that time and probably needed a decent charge again. It's probably the irony of Stop/Start in that when conditions are ideal for you to want it, the conditions are also therefore ideal for it to struggle to keep up!
Overall my S/S has been faultless, but my driving is almost all 20 minute + runs at 70+ mph so everything gets a chance to stay in good condition I expect. I think those who are in traffic the most are probably the most likely to have S/S act up the most also....
Yesterday after about 7 or 8 long stops in a pretty short space of time, the Stop/Start finally gave up. No surprise really as it was running on battery only for a majority of that time and probably needed a decent charge again. It's probably the irony of Stop/Start in that when conditions are ideal for you to want it, the conditions are also therefore ideal for it to struggle to keep up!
Overall my S/S has been faultless, but my driving is almost all 20 minute + runs at 70+ mph so everything gets a chance to stay in good condition I expect. I think those who are in traffic the most are probably the most likely to have S/S act up the most also....
Eco just reduces the 'power' going to aircon. So runs at a reduced rate. Stop /start will switch aircon off when car has stopped. It does this on all the vehicles I have driven. When air con is needed again as cabin is too hot, the engine will start to allow compressor to run. The fan runs at a reduced rate blowing the residual cooled air into the cabin.PhilB said:
Be aware start/stop is not really designed to work all the time or for prolonged periods. It is designed to allow the car to pass euro6 regs, if it is was designed to improve emissions for a prolonged period a different design would have been utilised.
I would bet that if one reduced the usage of all electrical systems (radio, aircon, lights etc), stop/start will operate for longer but only up to a certain point.
I must be lucky as mine seems to work fine.
Kicks in a few miles after starting in morning - certainly not up to running temperature.
Works even though I have heater, heated screens etc. all on - even air-con sometimes.
I agree with GMH - as mine will restart if stationary for a while with lots of systems on.
In summer with less systems on it stays off much longer.
I do think though that it is too sensitive - unless it needs to be to protect the battery
Kicks in a few miles after starting in morning - certainly not up to running temperature.
Works even though I have heater, heated screens etc. all on - even air-con sometimes.
I agree with GMH - as mine will restart if stationary for a while with lots of systems on.
In summer with less systems on it stays off much longer.
I do think though that it is too sensitive - unless it needs to be to protect the battery
This thread has now been pinned to keep it at the top of the pile and moved to the main faults section after a suggestion from a member.
It should save new threads being started on this very topical subject and keep all the info in one place.
Please carry on stopping and starting.
It should save new threads being started on this very topical subject and keep all the info in one place.
Please carry on stopping and starting.
One thing I notice about the new range rover PHEV is that the remote cabin climate control now works off the large battery. You can heat the cabin before entry without starting the engine. I'm sure with a larger battery such systems as clinare and srart/stop will work for much longer.
My 200 r sport has been back to JLR 3 times in last 12 months re stop start not working. It used to be intermittent but now just doesn't work EVER!. Last time they has car 3 days & they said they had to "reprogram" something! Going back tomorrow for 4 th time. Car is 18 months old and this has been ongoing since it was about 6 months old. Car serviced at 13 months. Have other cars - Audi /Mercs & they all worked. Any loan car works fine - not impressed!!!!
Exactly the same as mine; on the 4th occasion, when the car was 15 months old, a new battery was fitted and it has worked perfectly ever since.
Unlike many on here I actually like it, so I am finally happy to have it working as it should.
Unlike many on here I actually like it, so I am finally happy to have it working as it should.
Joined
·
476 Posts
Following on from my posts above, it has now been 10 days since they replaced the battery and after two years of almost total disappearance, Stop/Start now activates regularly, notwithstanding numerous short journeys from frosty remote starts. Too early to say that the solution is total and absolute but so far, so good and based on robdayau's experience it looks optimistic.
RMC, ask them for a bench test of the battery with a view to having it replaced.
RMC, ask them for a bench test of the battery with a view to having it replaced.
61 - 80 of 899 Posts
- Status
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
