TD5 stalls on hill starts low power

[TD5 Pilot]

Hi Guys
My Discovery TD5 will not pull away on a incline some times Ivehad to put it into low box to pull away. It just feels like it hasn't got the tourqe. It has been feeling down on power too some times it starts off sluggish then all of a sudden its like it gets sudden shot of boost and power restored. Any one else suffered this. Recent Siemens OEM pump fitted new fuel filter new fuel regulator and filter clear in head. Turbo waste gate is good no engine light on

 

[Semicolon]

Hi there, don't know if your truck has one but my 03 behaves a bit like that when the catalytic convertor is choked up. Despite my normal suspicion re "snake oil" 2 doses of Cataclean have made a difference.

 

[TD5 Pilot]

spot on mate its coming up to 200K miles on it im going to drop the exhaust of the down pipe and see how it goes maybe its blocked

 

[Interceptorxj]

I would also disconnect your MAF sensor and see if there is any improvement. This only takes 30 seconds to do with no cost involved. If there is a marked improvement you can leave it unplugged until you have time to replace it.

 

[Anaconda]

spot on mate its coming up to 200K miles on it im going to drop the exhaust of the down pipe and see how it goes maybe its blocked

The cat is on the downpipe, removing the rest of the exhaust is unlikely to make any difference to a blocked cat.

 

[Stanleysteamer]

Check the MAP/IAT sensor. Mine did that. With help from on here I checked the data while it was running which proved that even though clean, it was fubar.

 

[TD5 Pilot]

Thanks Guys
Il look at the both those sensors the MAF seems to be common on the TD5 would anyone have data i should be looking for

 

[TD5 Pilot]

The cat is on the downpipe, removing the rest of the exhaust is unlikely to make any difference to a blocked cat.

Il drop it off at the turbo

 

[Stanleysteamer]

If your TD5 is the one in your avatar pic it looks early, i.e. pre-facelift so I am a little surprised it even has a cat.
If it has a 15p or 16p engine then just unplugging the MAF will have a more dramatic effect than if it was on a 10p engine.
sorry

 

[Stanleysteamer]

Update, and so as not to bother @sierrafery
Here is my thread which dealt with this and shows what to look for on live data.

Air flow logged low, IAT logged high.

Hi all, looking for help with a problem that only seems to occur when the engine gets really hot and/or when the weather is hot. Could this simply be that the MAP/IAT needs replacing? The Fault is that as I pull away from a standstill, i.e when lights change or when joining a roundabout, the car...

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