Anti stall not working

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ratty said:
Td5's do have anti stall but compared to the new tdci's it's crap.
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would you be so kind and explain how is that managed on a Td5 though? ... i've studied very deeply the engine management and didnt find any description of such thing in the addaptive strategy... or is that ''anti stall'' only a generic term for something not some built in feature? ... i'm not trying to argue i just want to understand
 
sierrafery said:
would you be so kind and explain how is that managed on a Td5 though? ... i've studied very deeply the engine management and didnt find any description of such thing in the addaptive strategy... or is that ''anti stall'' only a generic term for something not some built in feature? ... i'm not trying to argue i just want to understand
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I don't know tbh. What I do know is that I can't stall my Landy in low range with feet off the pedals even when on a steep hill towing a 10 ton truck. I can stall it if I touch the throttle though. There are plenty of vids out there of people demonstrating it and it's written up in the project storm literature.

http://www.lr-mad.co.uk/en/land-rover-td5
 
You may want to test the fuel pressure at the regulator, this should read 4 bar. I can't see this being a fuelling problem providing the vehicle is driving normally. You should be able to drive in 1st/2nd/3rd/4th and rev up all the way 4000rpm (maybe 5th but you'll be going a tad fast). It sounds like the engine isn't seeing something. As sierrafery has suggested try unplugging the MAF. I expect this will have a positive impact on your performance, however I don't believe this will have any effect on the stalling issue.

Perhaps its the larger tyres, what is the throttle response like, does it hold back in both low and high?

It sounds to me like an ABS sensor is failing/failed. Have you had the 3 amigos light up? Jack each corner up and put the vehicle in 1st and release the clutch slowly. You should register 10-15mph. If you don't then it will be that hub. I think what's happening is when you try to pull off that corner can't see the wheel speed and thus the TC does not work. You still because all the power is going to that free spinning wheel and what's left simply isn't enough to get you going. If you have diff locks on your lt230 then can I suggest putting the centre diff in and seeing if "the good old mechanical method" makes any difference. Also replace the hub that's failed, I bet you have one!!
 
I don't know if a Td5 has anti stall or not. Some compelling evidence in this thread that it doesn't. However, when the 2.4 Puma's came out, it was something I read about and read more than one place that said Td5's also had it.

I have no proof of this, however I can attest to having driven several Td5's Disco's that must do something to prevent stalling. A good example is just manoeuvring around a tight yard in high 1st. If you use the throttle pedal, it's quite easy to stall the Td5. However keep your foot well clear of the pedal and it won't stall, but does something to keep the revs up, even bumping over obstacles in high range.

Doing the same and resting your foot on the pedal will cause it to stall too, so the position sensor must be quite sensitive.

My logic assumed if you where having an input on the pedal, then it must be overriding any ECU anti stall ability. Keep off the pedal and the ECU will sort it out.

Don't think I've tried this in 2nd low range, but certainly high range on multiple Discovery's it acts the same.
 
sierrafery said:
would you be so kind and explain how is that managed on a Td5 though? ... i've studied very deeply the engine management and didnt find any description of such thing in the addaptive strategy... or is that ''anti stall'' only a generic term for something not some built in feature? ... i'm not trying to argue i just want to understand
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ratty said:
I don't know tbh. What I do know is that I can't stall my Landy in low range with feet off the pedals even when on a steep hill towing a 10 ton truck. I can stall it if I touch the throttle though. There are plenty of vids out there of people demonstrating it and it's written up in the project storm literature.

http://www.lr-mad.co.uk/en/land-rover-td5
Click to expand...

I've not studied the TD5 engine management particularly closely except for the maintenance manual, but as has been stated by Ratty they do have an anti stall most definitely in low range.
I do vaguely recall some mention back when the Puma was first released that it's anti stall was superior to the TD5.
I would be very interested to find out how it works.
I would have guessed an addaptive strategy but if you're saying there isn't one named as such, it can only possibly be called something else......Or possibly just a default protocol at zero throttle input?
 
Guys, the fact that a well working Td5 which doesnt have any management and fueling issued doesnt stall in LOW doesnt mean it has that "anti-stall" feature, afaik it's a management enhancement on modern cars which works based on crank sensor, road speed and torque calcuations made by a management designed for that... which IMO is not the case for Td5, as we speak about the case when no throttle is applied it's idle speed controll case here and for this the Td5 gets only the TPS input...the only thing which is resolved by the Td5 addaptive startegy is to keep stabile idle as long as the torque request doesnt exceed the fueling... that's it, so as in LOW it's a more "agressive" fuel map involved it will keep the idle speed better but this can't be named "anti-stall" IMO

i'll stand corrected if somebody shows me any official data about how the Td5 ECM is configured for that "anti-stall" management

IMO in this particular case it's about or an engine management/fueling issue or too high expectations in comparison with other vehicles :)
 
Cannot comment on a tech document on the anti-stall for Td5 other than it works. The reality is I think the Ecu will do whatever it can to fuelling to ensure 750 revs are maintained when no throttle us used. This has a side effect of being a very basic anti-stall mechanism. With no pedals a td5 in low second will drive over most things without a stalling as the Ecu will increase fuelling appropriately to ensure 750 rpm is maintained. Touch the throttle and the Rev management stops and the LR can stall.
 
Shifty1962 said:
Well I've learned something new today! Not seen you around on the forums for a while mate. Hows things?
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Hiya Shifty

I'm good thanks. It's been a bit hectic at home and work and I find it hard to get back into the swing of LZ if I haven't been on it for a while. The longer I leave it the harder it seems to get.

How's things with you?
 
All good mate. Just started a new job and getting used to a regular salary rather than the variable income as self employed. Will also make a nice change to get paid while on holiday. My Fender is running like a sewing machine (prob jinxed it now though). Also bought a Scooby Outback after my Doris blew our Volvo up which is turning into a bit of a money pit. Its nice when it works but parts are very expensive.
 
Shifty1962 said:
All good mate. Just started a new job and getting used to a regular salary rather than the variable income as self employed. Will also make a nice change to get paid while on holiday. My Fender is running like a sewing machine (prob jinxed it now though). Also bought a Scooby Outback after my Doris blew our Volvo up which is turning into a bit of a money pit. Its nice when it works but parts are very expensive.
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My Landy is running fine too but it's time for me to sort the rust out. Luckily I've managed to buy the very last black sheep rear crossmember and am also gonna sort the rust out that's making an appearance on the bulkhead plus am on the hunt for two new second row doors.

Hopefully it'll keep my Landy on the road for a good few years to come.
 
ratty said:
My Landy is running fine too but it's time for me to sort the rust out. Luckily I've managed to buy the very last black sheep rear crossmember and am also gonna sort the rust out that's making an appearance on the bulkhead plus am on the hunt for two new second row doors.

Hopefully it'll keep my Landy on the road for a good few years to come.
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I've got to have a go at my front door bottoms this year. I must also get round to painting my blacksheep xmember as its just been painted in red oxide since it was fitted. Cracking piece of engineering from Clive. He also made me a heavy duty front bumper from the same 6mm steel which takes no prisoners in Sainsbury's car park when they park blocking me in lol.
I'm on the look out for a decent spare diff to convert to a locker so if you hear of one give me a shout.
 
Shifty1962 said:
I've got to have a go at my front door bottoms this year. I must also get round to painting my blacksheep xmember as its just been painted in red oxide since it was fitted. Cracking piece of engineering from Clive. He also made me a heavy duty front bumper from the same 6mm steel which takes no prisoners in Sainsbury's car park when they park blocking me in lol.
I'm on the look out for a decent spare diff to convert to a locker so if you hear of one give me a shout.
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http://www.ebay.co.uk/itm/261973326014?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1586.l2649
Just happens im selling a near perfect one
 
Shifty1962 said:
I've got to have a go at my front door bottoms this year. I must also get round to painting my blacksheep xmember as its just been painted in red oxide since it was fitted. Cracking piece of engineering from Clive. He also made me a heavy duty front bumper from the same 6mm steel which takes no prisoners in Sainsbury's car park when they park blocking me in lol.
I'm on the look out for a decent spare diff to convert to a locker so if you hear of one give me a shout.
Click to expand...

I was hoping Clive would make me a rear crossmember come bumper which I could mount an electric winch inside but unfortunately he wasn't able to due to his circumstances. I'm just glad I got to him in the nick of time as I'll take his rear crossmember over a standard one any day.

Looks like johnlad might be able to sort your diff problem for you.
 
Just done a little experiment this morning re anti stall.
Sure enough if I select 2nd Lo it climbs up and over a high curb and a railway sleeper with no trouble at idle but if I so much as breathe on the throttle it stalls unless I feed it more pedal. So there is obviously some form of intelligence going on with regards to the ECU keeping the revs at about 750 with no throttle input.
 
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