Disco 2 D2 TD5 Auto - Hesitation

Shogun243 · Aug 4, 2025

Hi all,
Back with a new truck and some new (albeit more minor) issues!

Having some issues with pulling away - I don't expect sizzling 0-60 times, but there is a distinct hesitation between foot down to movement when starting from a standstill.

This seems about 2 seconds, after which the truck goes like the clappers without issue. Pulling the MAF does not affect this behaviour.

The gear selector and dash show D correctly when it is selected, and I've not had any starting/running issues or similar.

Any ideas?

Stanleysteamer · Aug 4, 2025

Shogun243 said:
Hi all,
Back with a new truck and some new (albeit more minor) issues!

Having some issues with pulling away - I don't expect sizzling 0-60 times, but there is a distinct hesitation between foot down to movement when starting from a standstill.

This seems about 2 seconds, after which the truck goes like the clappers without issue. Pulling the MAF does not affect this behaviour.

The gear selector and dash show D correctly when it is selected, and I've not had any starting/running issues or similar.

Any ideas?

I think this is quite common, especially when cold.
Mine did that but much worse until I changed the MAP/IAT sensor.
If you can have a look at live data it might tell you how your MAP/iat is behaving.
You could always just take it out and clean it, very carefully, don't go poking anything down the little hole, that'll buggr it for sure! Use Sensor cleaner.

Stanleysteamer · Aug 5, 2025

Shogun243 said:
Hi all,
Back with a new truck and some new (albeit more minor) issues!

Having some issues with pulling away - I don't expect sizzling 0-60 times, but there is a distinct hesitation between foot down to movement when starting from a standstill.

This seems about 2 seconds, after which the truck goes like the clappers without issue. Pulling the MAF does not affect this behaviour.

The gear selector and dash show D correctly when it is selected, and I've not had any starting/running issues or similar.

Any ideas?

Has to be said this is also par for the course with an auto, the torque converter has to power itself up, and there may be some electronics involved which might also be a factor, but not sure about that. @sierrafery will tell us.
You get used to it.

Like when overtaking, put your foot down ahead of time to allow for it.
I had two auto Cortinas, mk2 and mk3, when I was a rep, and I used to tear around like an idiot, as much younger then, so learned to time the foot down process!

Shogun243 · Aug 5, 2025

Ive ordered a transmission service kit so I can rule out filter or low fluid.

Paid more attention to it the last few times and it actually feels like the engine itself is "waiting", either boost or ECU not allowing more fuel for a second or two?

Stanleysteamer · Aug 5, 2025

Shogun243 said:
Ive ordered a transmission service kit so I can rule out filter or low fluid.

Paid more attention to it the last few times and it actually feels like the engine itself is "waiting", either boost or ECU not allowing more fuel for a second or two?

Your servicing of it with a new filter and fluid will do no harm at all.

Luke2025 · Aug 5, 2025

just wondering, is this from neutral, bang in drive then flooring it straight away? or already in drive, floor it and it does nothing for 2 seconds? do the revs jump up or like pause for 2 seconds?

Luke2025 · Aug 5, 2025

i say flooring but i just mean accelerating hahaha!

Shogun243 · Aug 6, 2025

Luke2025 said:
just wondering, is this from neutral, bang in drive then flooring it straight away? or already in drive, floor it and it does nothing for 2 seconds? do the revs jump up or like pause for 2 seconds?

This is both, happens after starting the drive but also on the road - have nearly come acropper at roundabouts and junctions when I shoot a gap and then trundle across both lanes for about 5 working days!

MJI · Aug 6, 2025

10P or 15P?

Is there a MAF?

15P will no MAF will drive like this.

Shogun243 · Thursday at 07:04

15p I believe, previous owner had it remapped and they did so via OBD which if memory serves is not possible on the 10p, correct me if im wrong?

Stanleysteamer · Thursday at 12:25

Shogun243 said:
15p I believe, previous owner had it remapped and they did so via OBD which if memory serves is not possible on the 10p, correct me if im wrong?

Standard original early 10p ECMs were un-remappable I believe without changing a chip, at least one, but @sierrafery will confirm.
Have you already done live data?
I still think it could be the MAP/Iat as it was very like that on mine till I changed it. But mine is a 2000MY 10p engine.

Shogun243 · Thursday at 13:14

Stanleysteamer said:
Standard original early 10p ECMs were un-remappable I believe without changing a chip, at least one, but @sierrafery will confirm.
Have you already done live data?
I still think it could be the MAP/Iat as it was very like that on mine till I changed it. But mine is a 2000MY 10p engine.

Unplugging the MAF made no difference to the symptoms, but I've got no dash lights (ignoring the ABS mates that turn up every once in a while), could it still be MAF?

sierrafery · Thursday at 19:23

Shogun243 said:
Unplugging the MAF made no difference to the symptoms, but I've got no dash lights (ignoring the ABS mates that turn up every once in a while), could it still be MAF?

If no difference with MAF unplugged it's not that.... what do you mean you have no dash lights? they dont come on at all for the ignition self test?

Shogun243 · Thursday at 19:36

sierrafery said:
If no difference with MAF unplugged it's not that.... what do you mean you have no dash lights? they dont come on at all for the ignition self test?

No warning lights under normal driving is what I meant! Cluster lights all check cycle as normal during ignition on.

Next step, find my mate with Nanocom for a sniff about to see what its not telling me!

Shogun243 · Monday at 15:58

sierrafery said:
If no difference with MAF unplugged it's not that.... what do you mean you have no dash lights? they dont come on at all for the ignition self test?

They do, but by no dash lights I mean nothing appearing linked to the behaviour. All lights check cycle as they should when ignition is turned on!

sierrafery · Monday at 16:42

Run a stall test on it

Disco 2 D2 TD5 Auto - Hesitation

Shogun243

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