No response from accelerator D4

[Freddo]

Hi Gents, just returned from a camping weekend. Unpacked my ldr 4 TDV6 and went to start it the following day. Engine warning light lit up, car starts and goes into gear but when I press the accelerator down there’s no response. No revs nothing, a few shudders intermittently. What’s the prognosis? Thanks in advance.

[Homestar]

Throttle pedal sensor? Have you got a diagnostic tool that reads throttle pedal percentage? Most do and even cheap OBDII readers show this generally.

[101RRS]

What is a ldr 4? Never heard of that model.

[Vern]

What is a ldr 4? Never heard of that model.Discovery 4

[Freddo]

Throttle pedal sensor? Have you got a diagnostic tool that reads throttle pedal percentage? Most do and even cheap OBDII readers show this generally.
NRMA ran a scanner and it came back with an egr fault

[Homestar]

NRMA ran a scanner and it came back with an egr fault

Did they only look at faults or look at any active data? An EGR fault may limit throttle output, but I'd be checking to see what the pedal was doing as well.

[101RRS]

Discovery 4

You need to let the OP explain his use of weird nomenclature.

[101RRS]

NRMA ran a scanner and it came back with an egr fault

You may have that fault but even with failed EGRs the throttle will still work but not all that well - so as Homestar suggests you need to look at the throttle system.

[Freddo]

You may have that fault but even with failed EGRs the throttle will still work but not all that well - so as Homestar suggests you need to look at the throttle system.

Thanks Gents. I’ve got it booked in for repair later this week. I wanted to be across the potential issue/s on the day.

[Discodicky]

Hi Gents, just returned from a camping weekend. Unpacked my ldr 4 TDV6 and went to start it the following day. Engine warning light lit up, car starts and goes into gear but when I press the accelerator down there’s no response. No revs nothing, a few shudders intermittently. What’s the prognosis? Thanks in advance.

Not the dreaded faulty stop (brake) light switch problem???
That's exactly wot happened to me a year ago.
Suggest replace switch anyway as it can be problematic and only about $30 bucks.

[101RRS]

Ref a possible EGR issue, research alternative options on this site to replacing them before you go ahead with this work. I am not sure what is available for the 3.0 but others can advise. If you replace them it will be expensive and you will most likely to have to do it again in 60,000km.

[veebs]

Does it start without pushing the brake pedal? Just key in the car, push the button?

[DiscoJeffster]

Ref a possible EGR issue, research alternative options on this site to replacing them before you go ahead with this work. I am not sure what is available for the 3.0 but others can advise. If you replace them it will be expensive and you will most likely to have to do it again in 60,000km.

Hmmm. My EGR is still working fine 300,000km later. I haven’t had to replace them once let alone five times.

[101RRS]

Hmmm. My EGR is still working fine 300,000km later. I haven’t had to replace them once let alone five times.

You are very much the exception. If your experience was normal then sellers of blanking kits and electronic EGR deletes would not have a business.

[DiscoJeffster]

You are very much the exception. If your experience was normal then sellers of blanking kits and electronic EGR deletes would not have a business.

They are a common failure point on the D3. There is not anything like the level of failure on the D4. Unsure why not.

[scarry]

They are a common failure point on the D3. There is not anything like the level of failure on the D4. Unsure why not.

Common issue on the diesel Ford Territory as well.

[Macadamia]

Ref a possible EGR issue, research alternative options on this site to replacing them before you go ahead with this work. I am not sure what is available for the 3.0 but others can advise. If you replace them it will be expensive and you will most likely to have to do it again in 60,000km.

Not so easy on the 3L and a bit controversial. It requires a remap. Bell Auto are hoping to have a ECU update for the 3L like they have for the 2.7L but no such luck yet. And last time I asked about this I was chastised because (apparently) the EGR values in the 3L act as pressure relief valves (blow off valves)...?

my 2016 is at 150,000km and hasn't had an EGR error yet. I do like to give it some pretty often though so maybe that helps to keep the soot down in the engine.

[101RRS]

Hey all I said was research the topic before spending big bucks - noting while you guys may not have had issues, the OP does have EGR fault codes.

[loanrangie]

I would be checking the plug on the throttle pedal for corrosion and a clean with contact cleaner, failing that if there is a TPS fault it will be in the pedal.

[2010LR4]

Mine has very similar symptoms. Check Engine light on. On startup it would sound a bit cranky and then idle but if you put the foot down it wouldn’t rev. To get it to move I had to put it in low range. Once warmed up it would drive OK. This was/is a faulty EGR valve. It was stuck so it was pushing cold air into the intake.

It’s in as we speak to get them replaced. I’ve opted to do both instead of one now and then other requiring to be done later. May as well do both now. Mine has 260,000 kms on it.

From all my research it’s not as simple as an EGR delete (remove and blank off) on the Discovery 3’s. The 4 need reprogramming work and I’m not even 100% sure you can get it done anywhere. If it was a Disco 3 I would absolutely get the permanent removal done.

[CF0491]

The Disco 4 can be done. I have a 2.7, had the EGR blanked and ECU reprogammed. That was 80,000km ago and ive had no further issues

[Eric SDV6SE]

D4 3.0 has two egrs and they are integrated into the ecu as well as the cooling system. They can be mapped out and blanked, but requires a fair bit of mods to the ecu.

Even if mapped out, they can still cause coolant leaks.

I've thought about mapping them out, but decided against it for the above reason. 211000km and still on original valves. I regularly check them for free activation and any coolant leaks. Happy to report no issues. I did re-seal the flanges into the top of the valves last December.

[BradC]

211000km and still on original valves.

To be fair if the 2.7 valves were that reliable I'd still be using them. I only mapped them out and blanked them because they were repeat offenders and I didn't want to be out bush and trying to pull a van back in limp mode on the bump stops.

[PerthDisco]

To be fair if the 2.7 valves were that reliable I'd still be using them. I only mapped them out and blanked them because they were repeat offenders and I didn't want to be out bush and trying to pull a van back in limp mode on the bump stops.

240k kms and still on original egrs TDV6 2.7

Still number one priority to delete them and coolers. Hopefully a new video idea for Shane.

My guess is a regular long trip helps a lot rather than city driving

[Eric SDV6SE]

My guess is a regular long trip helps a lot rather than city driving

Yep, and a good use of the right foot once in a while to get the cobwebs out, 3500rpm cleans it out nicely.

So glad mine doesnt have a dpf, those are known culprits for blocking everything

[veebs]

So glad mine doesnt have a dpf, those are known culprits for blocking everything

Same here, though I do feel a little guilty when I read the emissions sticker in the engine bay…