TD5-Pulled clutch master cyl ECU plug, TOPS

[dhumphri]

Reading thru some old post the other day and found one on pulling the ECU plug at the clutch master cylinder.
Tried this on the weekend and the difference is fantastic. Gear changes are soooooo much smoother now.
If u have not tried this I recommend it https://www.aulro.com/afvb/

[Omaroo]

<div class='quotetop'>QUOTE(dhumphri &#064; May 15 2006, 01&#58;39 PM) Quoted post</div><div class='quotemain'>
Reading thru some old post the other day and found one on pulling the ECU plug at the clutch master cylinder.
Tried this on the weekend and the difference is fantastic. Gear changes are soooooo much smoother now.
If u have not tried this I recommend it https://www.aulro.com/afvb/
[/b][/quote]

Huh?

[Scouse]

The Td5 clutch master cylinder has a pressure switch to let the engine ECU know when the clutch is disengaged.
It reduces the engine power momentarily (or something like that) but some have found it&#39;s better when it&#39;s disconnected, like dhumphri obviously has https://www.aulro.com/afvb/ .

[Omaroo]

Sounds good. I&#39;ll be trying it this evening. I really hate the gearchanges on our Td5 - I&#39;ve learned to do them smoothly, but anyone driving it sends shockwaves down the transmission and back every change.

[dhumphri]

Omaroo I was frankly amazed by the difference. I cant understand why u would have this sensor attached after a weekend of driving my vehicle without.

I also got rid of the centre muffler on the weekend as an experiment - had a stainless pipe made up by a local exhaust shop. This has made the engine much smoother and more responsive above 2000RPM.

My truck used to hate revving at or over 2500, now it seems so much sweeter in this RPM zone.

No matter what others say though it does make the car harder on the ears but not by much, the exhaust now makes a really low resonant sound where as before I did not notice it at all.

Daz

[Omaroo]

Also sounds good Daz https://www.aulro.com/afvb/

Yep - same complaints from me. Engine seems really rough and rattly over (what I think is) 2500rpm or so. Where abouts are you? It&#39;d be interesting to do a comparison on the two vehicles to see if our gripes are just normal or not. https://www.aulro.com/afvb/

[dhumphri]

Am in Sydney - live in Kurrajong Heights and drive down to either Richmond or Blacktown each day, then get the dreaded train into the city.

From what I have been able to tell the roughness over 2000 rpm is normal.

[Omaroo]

OK - I did this when my wife made it home with the Defender (it&#39;s her daily driver - lucky sod&#33;).

This is the single best piece of motoring advice I&#39;ve received this year. What a difference. Gone is that horrible slowing between gear changes. It&#39;s so dramatic that I&#39;ll have to re-learn how to change gear smoothly in this car again. The vehicle doesn&#39;t slow to a crawl between first and second any more - it accelerates better through the gears as you don&#39;t lose momentum at all. What a ripper&#33;

SO.... what&#39;s the downside anyone? I&#39;m sure that this was all very much of the design plan for the Td5 - so what is the original purpose? It cetainly didn&#39;t help with smoothing out changes if that&#39;s what they wanted....

Cheers Daz

Chris

[tombraider]

On manual vehicles with Cruise Control the cruise wont disengage when you hit the clutch and the vehicle will roar to redline.

Thats the issue&#33;&#33;&#33;&#33;

Cheers
Mike

[Omaroo]

<div class='quotetop'>QUOTE(tombraider &#064; May 15 2006, 10&#58;12 PM) Quoted post</div><div class='quotemain'>
On manual vehicles with Cruise Control the cruise wont disengage when you hit the clutch and the vehicle will roar to redline.

Thats the issue&#33;&#33;&#33;&#33;

Cheers
Mike
[/b][/quote]

Cruise..control... ???? https://www.aulro.com/afvb/




https://www.aulro.com/afvb/

[dhumphri]

no worries Chris - had to share this little gem with someone. Have not found the cruise controls in my TD5 either...

[Frenchie]

Won&#39;t it disengage when you hit the brake?

(Can&#39;t imagine why you would hit the clutch with cruise engaged??) style_emoticons/<#EMO_DIR#>/mellow.gif

[Piddler]

try coming up to a round about on the highway Frenchie,
It may mean to some that they have o change their driving style.

[cwebb]

Obviously you guys with the defenders must have a different Master Cylinder than those of us with Discovery TD5 manual. I know exactly where the master cylinder is, however there is definitely NOT a ECU plug connected to it. I checked the slave clyinder too.
As someone said, as the Disco has cruise control, perhaps the clutch switch is actually on the clutch instead of the master cylinder?

[disconut]

<div class='quotetop'>QUOTE(tombraider &#064; May 15 2006, 08&#58;12 PM) Quoted post</div><div class='quotemain'>
On manual vehicles with Cruise Control the cruise wont disengage when you hit the clutch and the vehicle will roar to redline.

Thats the issue&#33;&#33;&#33;&#33;

Cheers
Mike
[/b][/quote]

I believe I was the original author of that post. It does make a big difference. Ask Zook. Alas I fitted an Autron Cruise Control to mine and hooked it up again. What a pain&#33; https://www.aulro.com/afvb/ I am about to disconnect it again. I need another switch that is the reverse of what is now fitted so the cruise will operate correctly when the clutch is engaged. That way I can leave the ECU plug off permanently. I had the plug off and wired the cruise across it and it is backwards to what you expect. ie, clutch in and the switch makes, clutch out and it breaks the circuit. If anyone has their switch out can you please give me the thread size? I will source an aftermarket one to do the job.

Trev.

[bluetongue]

I removed the switch from my 2000 TD5 defender tonight and took it for a run... it definately makes a difference. I don&#39;t know if it was my imagine or not but also seemed to make a difference in the high revs. Truck just seemed to have more guts to get up inclines and I could actually accelerate up a hill when doing over 80-90 k&#39;s.... climbed up over 100 k&#39;s no worries... I&#39;m sure it wasn&#39;t doing that before. I&#39;ll do more tests on same bit of road I think - with/without the switch.

Daz, with the straight-thru pipe... after some discussions on a thread a few weeks back, I took mine to a muffler place and they told me it was illegal to not have a muffler. I was planning to take it to a few more places, but I was just wondering if you had any problems or if you just got them to do it regardless?

Regards,
Scott

[rick130]

So, do Disco II&#39;s have the clutch switch or not ? as I just told a DII owner tonight to disconnect his as he was complaining about just those symptoms. https://www.aulro.com/afvb/

[disconut]

<div class='quotetop'>QUOTE(rick130 &#064; May 16 2006, 10&#58;38 PM) Quoted post</div><div class='quotemain'>
So, do Disco II&#39;s have the clutch switch or not ? as I just told a DII owner tonight to disconnect his as he was complaining about just those symptoms. https://www.aulro.com/afvb/
[/b][/quote]

A quick glance at the disc would suggest not.

Trev.

[dhumphri]

Hi Scott

The exhaust place I went to did mention that it was illegal but was happy to do it anyway.
I just kept the old muffler for road worthys in case I have to refit it.

Would be a 20 minute job to do if needed.

After a few days driving it I no longer notice the slightly &#39;thoatier&#39; sound the exhaust makes.
Definately improves performance though.

Daz

[Rosco]

I&#39;m with Bluetongue here ... p&#39;raps my imagination, not sure ... https://www.aulro.com/afvb/ https://www.aulro.com/afvb/. I tried it today and after a spot of running around it appeared to be significantly smoother on the uptake and gear changes.

<u><span style="font-size:36pt;line-height:100%">BUT</span></u>

I also filled to the brim prior to my daily peregrinations and have this dreadful feeling .. https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ that the fuel gauge appeared to drop at an ernstwhile unheard of rate.

Would this be a possible downside https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/

I shall watch closely my roamings on the morrow.

Rosco

[disconut]

<div class='quotetop'>QUOTE(Rosco &#064; May 17 2006, 07&#58;53 PM) Quoted post</div><div class='quotemain'>


I also filled to the brim prior to my daily peregrinations and have this dreadful feeling .. https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ that the fuel gauge appeared to drop at an ernstwhile unheard of rate.

Would this be a possible downside https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/

I shall watch closely my roamings on the morrow.

Rosco
[/b][/quote]

It wont change your economy. I log all my fuel usage. You are probably just lead footing it to fully enjoy the smoooooooth gear changes. https://www.aulro.com/afvb/ https://www.aulro.com/afvb/ https://www.aulro.com/afvb/

Trev.

[DEFENDERZOOK]

<div class='quotetop'>QUOTE(disconut &#064; May 16 2006, 07&#58;57 PM) Quoted post</div><div class='quotemain'>
I believe I was the original author of that post. It does make a big difference. Ask Zook. Alas I fitted an Autron Cruise Control to mine and hooked it up again. What a pain&#33; https://www.aulro.com/afvb/ I am about to disconnect it again. I need another switch that is the <span style="color:#CC33CC">reverse of what is now fitted</span> so the cruise will operate correctly when the clutch is engaged. That way I can leave the ECU plug off permanently. I had the plug off and wired the cruise across it and it is backwards to what you expect. ie, clutch in and the switch makes, clutch out and it breaks the circuit. If anyone has their switch out can you please give me the thread size? I will source an aftermarket one to do the job.

Trev.
[/b][/quote]


<span style="color:#006600">wouldnt it work out cheaper to just fit a relay or solid state transistor....?


and omaroo.....there is a down side....you might feel it once a month or less often....
it may surge a little bit in gear under certain loads and conditions which i cant manage to replicate....
i find it may do it whilst coasting at low speeds and giving it just half a tad of throttle.....most wont even feel
it....it will give a slight surging like you are on and off the throttle.....


but hey....&#33;&#33;&#33;
you are no longer dumping boost everytime you press the clutch to change gears.....
its almost like it has been chipped....no need to double de clutch to get gears in...they just fall straight in
like on a normal car......and you can change at normal speed without having to pause in the neutral position....


another thing you will need to watch....
if you take it in for a service....someone may reconnect the plug for you....thinking it fell off or was forgotten...

as for faults or any other problems...i havent had any....and mines only been off for the last 40,000kms....</span>

[disconut]

<span style="color:#CC0000">"wouldnt it work out cheaper to just fit a relay or solid state transistor....?"</span>

Could do, but its just too messy. I could have added a mechanical switch to the clutch also. I think an oil pressure switch or similar from Repco should do it.

40,000K,s eh. I think I still have your original smilie post somewhere&#33;

On ya Zook.

Trev.

[DEFENDERZOOK]

<div class='quotetop'>QUOTE(disconut &#064; May 17 2006, 08&#58;19 PM) Quoted post</div><div class='quotemain'>
<span style="color:#CC0000">"wouldnt it work out cheaper to just fit a relay or solid state transistor....?"</span>

Could do, but its just too messy. I could have added a mechanical switch to the clutch also. I think an oil pressure switch or similar from Repco should do it.

40,000K,s eh. I think I still have your original smilie post somewhere&#33;

On ya Zook.

Trev.
[/b][/quote]


<span style="color:#FF0000">and all thanks to you buddy.....</span>

[bluetongue]

Zook mentioned it may surge a little bit... yeah mine definately does this, I only noticed it today in peak hour traffic when I&#39;m coasting in 1st/2nd gears. Overall though it&#39;s a definate improvement...

[DEFENDERZOOK]

<div class='quotetop'>QUOTE(bluetongue &#064; May 17 2006, 09&#58;57 PM) Quoted post</div><div class='quotemain'>
Zook mentioned it may surge a little bit... yeah mine definately does this, I only noticed it today in peak hour traffic when I&#39;m coasting in 1st/2nd gears. Overall though it&#39;s a definate improvement...
[/b][/quote]


<span style="color:#333399">thats the function of that switch.....
either accelerate a bit more or back off the throttle.....i hardly ever get to the stage of surging...
it is so subtle it can hardly be felt.....</span>

[disconut]

I have just been doing some low range work and noticed the surging was more evident when climbing long hills etc. :mad:
So to keep the benefit of smooth gear changes around town and enjoy off roading without the surging, I decided to install a switch into the circuit. I can now decide which mode to operate in without leaving the cab. Cruise control works fine also.
You can have the best of both worlds! :)

I put the switch directly into the end of my seat extension rail and run the wiring directly into the ECU area.
"Cut the black/white wire on the black ECU plug", and "job done".

Trev.

114

115

[crump]

I tried this a couple of months ago and noticed no difference, could it be that as mine is chipped I'm already getting the benefit???:eek:

[disconut]

I tried this a couple of months ago and noticed no difference, could it be that as mine is chipped I'm already getting the benefit???:eek:

One I looked at had the wire "cut" 10mm up from the switch plug in the loom cover effectively disconnecting it. The owner was surprised.
Yours may already be done? or the switch is knackered?

Trev.