Thread: Suspect it's slow...

No change with MAF disconnected and lethargic tends to indicate a few potentials.

I’d like to see it on a diagnostic (Nanocom etc) for some MAF readings.

Also, some free and easy checks:
Bypass WGM direct to turbo
Check Wastegate can actuate freely.

Originally Posted by Tombie

No change with MAF disconnected and lethargic tends to indicate a few potentials.

I’d like to see it on a diagnostic (Nanocom etc) for some MAF readings.

Also, some free and easy checks:
Bypass WGM direct to turbo
Check Wastegate can actuate freely.

Free and easy checks are the kind I like.
I'll take a look at those later this week hopefully.

... cleaned MAP (was gunked up)...

Do you still have the EGR on it? ...if yes clean the valve too cos it might be clogged.

Originally Posted by thetravellingleunig

Hi all,
My TD5 is the only one i've ever driven, but I get the impression it doesn't run as it should.
It's an auto, 165000km on the clock.

First, it's slow.
I am not expecting a rocket ship, but it really drives like a truck, especially under 2500km. Slightly quicker than my old mans non turbo landcruiser... Very slow to get up to speed (a D1 tdi disappeared into the distance as I pulled away from some lights recently), quickly loses speed once you hit a hill . Even within that general poor performance it has flat spot/runs rough around 2200-2400rpm as well (which is right where the auto wants to drive).
It does go a bit better above 2750rpm/when you really open the throttle wide (so to speak), but also this feels a bit like I am thrashing it, not how it should need to be driven.

It's also getting poor economy, maybe 650km/78L or so. And I am light on the throttle, though is mostly short town drives (not city).

So far I have:
changed air and oil filters, put in a new injector harness, dealt with oil in red plug (cleaned comprehensively with contact cleaner, slightly improved responsiveness 1750-2250rpm), cleaned MAP (was gunked up) and MAF with contact cleaner, tried running MAF disconnected (no obvious benefit)...

Hmm...

Any suggestions as to where to next?

I don't need it to be fast, but at the moment it just feels not right. And of course better economy is always nice.

Basically what you have is a 2.5L engine pushing a 3T vehicle So Yes it is Not a rocket ship or a sports car and if you try to drive it like a sports car then your fuel consumption will suffer.
If you treat the truck for what it is and that is a very capable and comfortable 4WD and not try and treat it like a performance car then you fuel economy will improve

Originally Posted by trout1105

Basically what you have is a 2.5L engine pushing a 3T vehicle So Yes it is Not a rocket ship or a sports car and if you try to drive it like a sports car then your fuel consumption will suffer.
If you treat the truck for what it is and that is a very capable and comfortable 4WD and not try and treat it like a performance car then you fuel economy will improve

Off the horse you!

OP says he’s driving gently but that it’s completely lack lustre - and it sounds like it is off by the fuel consumption and performance described.

Originally Posted by trout1105

Basically what you have is a 2.5L engine pushing a 3T vehicle So Yes it is Not a rocket ship or a sports car and if you try to drive it like a sports car then your fuel consumption will suffer.
If you treat the truck for what it is and that is a very capable and comfortable 4WD and not try and treat it like a performance car then you fuel economy will improve

Fair call, but I think I mentioned already the the economy figures are achieved when dawdling around, getting left far behind taking off from lights, watching D1 TDIs disappear into the distance.
Like I also said, not looking for a sports car, just something that approximates what I've hear about these engines (which is that they actually can go fairly well compared to some comparable engines, and with reasonable economy).
I can live with it how it is, but figured might as well at least look into it 👍

Free but not easy,
I'd consider checking the air intake system hoses from the output side of the turbo to the engine intake.
My TD5 manual 1999 had similar sounding problems for a while and eventually my fix (after the mechanic doing the MAF etc etc ) was to replace the intake hoses, which looked fine on the outside but they had de-laminated inside.
Mechanic also found a piece stuck in the intercooler, which I think was the result of him blowing it out.

Though when my car was like this, my engine never sounded like I was "thrashing" it, it was just dull and sluggish and took forever to rev up, my fuel usage was higher but around 1L/110K higher.
Is it worth considering the torque converter. Sorry to say I've got no experience with auto's, so can't point to how to diagnose any issues.

Cheers Glen.

If I was you I'd put silicone intercooler hoses on the landrover rubber ones had a habit of delamination wich lead to poor performance and higher than normal fuel usage. If you can get hold of a nanacom or Hawkeye and check for faults this may help.