J

jsbholden

New Member
my disco is down on power and is shuddering under acceleration. I'm thinking seized wastegate? (no faults stored in the ECU)

How "free" should the movement be on it? I tried to move it earlier with some mole grips and it took a lot of force to get it to budge.

Is it also possible to run the wastegate as per the defender (no control module) by connecting the black hose from the wastegate directly to the intercooler hose? (thinking about ruling out the control module too)
 
jsbholden said:
my disco is down on power and is shuddering under acceleration. I'm thinking seized wastegate? (no faults stored in the ECU)

How "free" should the movement be on it? I tried to move it earlier with some mole grips and it took a lot of force to get it to budge.

It will take a big push to move it. It needs 15 psi into the pipe to start it moving.

Is it also possible to run the wastegate as per the defender (no control module) by connecting the black hose from the wastegate directly to the intercooler hose? (thinking about ruling out the control module too)
Click to expand...

Yes, it is possible, but the ECU will detect excess pressure, and probably shut the engine down. It might go into limp-home mode Don't mess with TD5 Disco turbo pressures. You will not increase the boost as you can in Defender TD5, and if you do mess it up you may start a lot of trouble.

CharlesY
 
CharlesY said:
Yes, it is possible, but the ECU will detect excess pressure, and probably shut the engine down. It might go into limp-home mode Don't mess with TD5 Disco turbo pressures. You will not increase the boost as you can in Defender TD5, and if you do mess it up you may start a lot of trouble.

CharlesY
Click to expand...

I don't spose you know how much extra boost I can gain without problems Charlesy?

I've thought about winding the wastegate rod a couple of turns more than once. I've been put off by the thought of spending my entire life with my landy in limp mode. It's bad enough when I don't use it for a couple of weeks and the bugger starts sticking.:eek::doh:
 
ratty said:
I don't spose you know how much extra boost I can gain without problems Charlesy?

I've thought about winding the wastegate rod a couple of turns more than once. I've been put off by the thought of spending my entire life with my landy in limp mode. It's bad enough when I don't use it for a couple of weeks and the bugger starts sticking.:eek::doh:
Click to expand...

If it's a TD5 DEFENDER you can hoick the boost up quite a lot, and you will feel the extra OOOOMPHHHH as a result. In DEFENDER TD5 engines the boost is controlled the old fashioned way, and as the pressure rises so the ECU flings in more fuel. You could take it up from 15 to nearly 20psi doing that, BUT HAVE A GAUGE FITTED FIRST! Don't do this job "blind" in case you over-boost and damage the turbo by over-speeding it which might rip it apart.

But the DISCOVERY TD5 isn't like that, more's the pity. The ECU controls the boost, and if it gets too much pressure (like only a little more than it is looking for) it assumes a turbo problem and sets into Limp Home Mode.

I believe there may be ways around this little snag, but I don't know what they are.

I had JE Engineering set my Disco up the way it should have been when it left the factory, and what a difference that has made. The sheer PULL from 1600 revs and up is really impressive, especially with a heavy trailer on. I can stay in higher gears and lower revs all the time, so that saves fuel over-all. As long as they are running correctly, TD5 "Storm" engines are pretty good. 2-litre diesel cars are generally pretty surprised the way my Disco can move if I feel like showing them.

I had all the injectors out of mine at under 20,000 miles and a year inside warranty, when a washer leaked. I decided this was a job needing done VERY CAREFULLY, and not by some dope-damaged 'fitter' in the main stealer's place.

Going like a sweetie ever since.

CharlesY
 
CharlesY said:
If it's a TD5 DEFENDER you can hoick the boost up quite a lot, and you will feel the extra OOOOMPHHHH as a result. In DEFENDER TD5 engines the boost is controlled the old fashioned way, and as the pressure rises so the ECU flings in more fuel. You could take it up from 15 to nearly 20psi doing that, BUT HAVE A GAUGE FITTED FIRST! Don't do this job "blind" in case you over-boost and damage the turbo by over-speeding it which might rip it apart.

But the DISCOVERY TD5 isn't like that, more's the pity. The ECU controls the boost, and if it gets too much pressure (like only a little more than it is looking for) it assumes a turbo problem and sets into Limp Home Mode.

I believe there may be ways around this little snag, but I don't know what they are.

I had JE Engineering set my Disco up the way it should have been when it left the factory, and what a difference that has made. The sheer PULL from 1600 revs and up is really impressive, especially with a heavy trailer on. I can stay in higher gears and lower revs all the time, so that saves fuel over-all. As long as they are running correctly, TD5 "Storm" engines are pretty good. 2-litre diesel cars are generally pretty surprised the way my Disco can move if I feel like showing them.

I had all the injectors out of mine at under 20,000 miles and a year inside warranty, when a washer leaked. I decided this was a job needing done VERY CAREFULLY, and not by some dope-damaged 'fitter' in the main stealer's place.

Going like a sweetie ever since.

CharlesY
Click to expand...

Cheers CharlesY:)

Might have to get myself a boost gauge me thinks. I just so happen to have a MUD dash unit to stick the bugger in (once I actually get around to fitting it).

My wastegate is a bugger for sticking when the landy hasn't been used for a bit, so a bit of extra movement in it could make all the difference.;)
 
CharlesY said:
If it's a TD5 DEFENDER you can hoick the boost up quite a lot, and you will feel the extra OOOOMPHHHH as a result. In DEFENDER TD5 engines the boost is controlled the old fashioned way, and as the pressure rises so the ECU flings in more fuel. You could take it up from 15 to nearly 20psi doing that, BUT HAVE A GAUGE FITTED FIRST! Don't do this job "blind" in case you over-boost and damage the turbo by over-speeding it which might rip it apart.

But the DISCOVERY TD5 isn't like that, more's the pity. The ECU controls the boost, and if it gets too much pressure (like only a little more than it is looking for) it assumes a turbo problem and sets into Limp Home Mode.

I believe there may be ways around this little snag, but I don't know what they are.

I had JE Engineering set my Disco up the way it should have been when it left the factory, and what a difference that has made. The sheer PULL from 1600 revs and up is really impressive, especially with a heavy trailer on. I can stay in higher gears and lower revs all the time, so that saves fuel over-all. As long as they are running correctly, TD5 "Storm" engines are pretty good. 2-litre diesel cars are generally pretty surprised the way my Disco can move if I feel like showing them.

I had all the injectors out of mine at under 20,000 miles and a year inside warranty, when a washer leaked. I decided this was a job needing done VERY CAREFULLY, and not by some dope-damaged 'fitter' in the main stealer's place.

Going like a sweetie ever since.

CharlesY
Click to expand...

dont suppose you know if all defender storm engines are the same CharlesY? mine's a 56 plate (we have discovered that my ECU is flashable) so wondering if it could be as the disco's are
cheers
 
buckshot said:
dont suppose you know if all defender storm engines are the same CharlesY? mine's a 56 plate (we have discovered that my ECU is flashable) so wondering if it could be as the disco's are
cheers
Click to expand...


I don't know. I tnink some of the early ECUs were a bit of trouble, but the later ones seem OK ... but tomorrow I think I will check mine for oil in the injector harness just in case.

My one is May 2004, nearly the last of the Disco Two type, and NO SUNROOFS!

70,000 miles and touch wood, running very nicely.
As long as it keeps going it's one of the best cars I have ever owned.

CharlesY
 
CharlesY said:
I don't know. I tnink some of the early ECUs were a bit of trouble, but the later ones seem OK ... but tomorrow I think I will check mine for oil in the injector harness just in case.
CharlesY
Click to expand...

It's well worth doing. I found mine full of oil a few weeks back.:mad::mad::mad:

Carb cleaner is doing a good job of keeping it at bay temporarily but I know that I'm gonna have to change the injector loom soon.:eek:
 
ratty said:
It's well worth doing. I found mine full of oil a few weeks back.:mad::mad::mad:

Carb cleaner is doing a good job of keeping it at bay temporarily but I know that I'm gonna have to change the injector loom soon.:eek:
Click to expand...


GGGrrr.............. Make my day willya!

I suppose I had better have a look then.

Reporting tomorrow!

CharlesY
 
The Mad Hat Man said:
any more nooz on them cables, Ratty?
Click to expand...

Not really. Still need to try em on as many vehicles as possible. I haven't connected em up to mine recently. I haven't had a chance to do anything to my landy recently. In fact I haven't really used it for a couple of weeks. I got loads to do but no time to do it.:mad:

Might be time to start playing pass the parcel wiv the cables.
 
meeting us - int that enuf?
I am trying to get some ECM extn cables tested. There seems to be a difference between the reprogrammable and non programmable ECM looms.
 
CharlesY said:
Yes, it is possible, but the ECU will detect excess pressure, and probably shut the engine down. It might go into limp-home mode Don't mess with TD5 Disco turbo pressures. You will not increase the boost as you can in Defender TD5, and if you do mess it up you may start a lot of trouble.

CharlesY
Click to expand...

So am I right in thinking that the defender setup is better? (brain was working on way into work this morn. Sure I can disable the wastegate module with the nanocom)
 
Take care you don't overdo it, as the turbine may over-speed and disintegrate, or hit the impeller casing, with disastrous results for both your engine and your bank balance.

Remember too, it isn't turbo BOOST which increases the power because boost is only more AIR - it is the addition of MORE FUEL into the higher air pressure to burn it that makes the power rise.

So ... BOOST alone doesn't to a lot, but IF the engine systems fling in more fuel BECAUSE there's more boost, you are in business.

Just take care it stays under control!

CharlesY
 
Just out of interest... reviving an old thread here.... why does the wastegate stick, what is building up in there to gum it up?

As mine stands for a week or two between uses it tends to have picked up the sticky bug... and for 'walletary' reasons I tend to be light on the right foot.
 
Thanks for provoking me into taking the heat shield off and wrestling with the little bu**er, now moves full range with finger tips and snaps shut luvverly......rod actuator off and wire brushed and cold galv to derust it.

Didn't have time to tinker with number of threads, but with new inter cooler last week (old one had pin hole in it) there is noticeably more power and smoother delivery........would have put it off for weeks without this thread, Cheers, A
 
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