TD5 Intermittent lack of power

TD5 year 2000

Hi Everyone, Hope you are well.

For a couple of months now I have had an intermittent fault on my Td5.There is a random hesitation/lack of power which i cannot seem to get to the bottom of. It revs fine when stood still, the problem seems to occur when moving, under load i guess.

I have renewed:-
Fuel filter (under rear wheelarch)
air filter
cleaned the MAP sensor
blanked off the EGR valve
injector harness (inside the rocker box)
cleaned the ECU plugs
It's been on the diagnostics machine at the garage which shows no
faults.

I am hoping someone on here could advise me what to look at/replace next. At the moment i feel like replacing the whole car.

Best regards
Red.

unplug the MAF and try so

redhotmax said:

TD5 year 2000

Hi Everyone, Hope you are well.

For a couple of months now I have had an intermittent fault on my Td5.There is a random hesitation/lack of power which i cannot seem to get to the bottom of. It revs fine when stood still, the problem seems to occur when moving, under load i guess.

I have renewed:-
Fuel filter (under rear wheelarch)
air filter
cleaned the MAP sensor
blanked off the EGR valve
injector harness (inside the rocker box)
cleaned the ECU plugs
It's been on the diagnostics machine at the garage which shows no
faults.

I am hoping someone on here could advise me what to look at/replace next. At the moment i feel like replacing the whole car.

Best regards
Red.

Click to expand...

Hi Red, when under load the engine obviously needs more fuel than when revved at standstill. The reason why I mention this is because I suspect your problem is to do with fuel delivery.

As you may know you have an electric pump within the fuel tank. Within this pump there is a plastic mesh filter - these get partially or even sometimes fully blocked with a black gunge substance.

If I were you I would first test to see if the pump is continually running, and if it is, remove it from the fuel tank and check/clean the mesh filter in the base of the pump.

The easiest way to get at the pump is:

1. Make a long cut in the middle of the carpet (and the rubber mat underneath) of the boot along the axis of the vehicle and fold back;

2. This will reveal a circular access panel - remove - and you now have access to the top of the fuel tank and fuel pump;

3. Remove retaining collar, disconnect fuel pipes and carefully remove fuel pump NOTING the orientation of the pump and the float arm;

4. The mesh filter is at the base of the pump.

Good luck


Dave

Sorry,

Forgot to mention, new MAF also fitted

Best regards
Red.

Cheers, thebiglad,

A job for this weekend i think.

Red.

Could also be a bad connection (dry joint) in the immobiliser.

I had similar fault which got progressively worse, never did it at tickover but did soon made the temp gauge read red when it cut out.

Could also be fuel pump relay

Hi All,
Just a reply to close this thread having solved my particular mechanical problem.

I carried out the cleaning of the fuel pump that sits in the tank as suggested by 'thebig lad' on here. It was not a difficult job really, I found the pump (including the mesh filter) to be covered in a sticky black film residue which was easy to wipe off.

3 days on and the old bus hasn't missed a beat, in fact it appears to be running better. A big thanks to 'thebiglad' - respect.

Best regards
Red.

redhotmax said:

Hi All,
Just a reply to close this thread having solved my particular mechanical problem.

I carried out the cleaning of the fuel pump that sits in the tank as suggested by 'thebig lad' on here. It was not a difficult job really, I found the pump (including the mesh filter) to be covered in a sticky black film residue which was easy to wipe off.

3 days on and the old bus hasn't missed a beat, in fact it appears to be running better. A big thanks to 'thebiglad' - respect.

Best regards
Red.

Click to expand...

Hi Red, I'm absolutely delighted that your Disco is running well again - always good to have a happy ending.


Keep up with the maintenance, maybe think about getting something to clean the gunk out of the tank and put some money aside to replace the injector seals.


Dave

Good news that its running well again,one point I would add is that there is no need at all to cut the carpet or mats etc - they will carefully pull out and back far enough to access the pump.The next owner may not like the sight of a carpet cut in half,it does not give a good impression of the skill of the techs who have cared for the car.
Some DII's are still in very good condition and worth a reasonable sum - one of my customers recently paid £7500 for a decent example because he cant bear the thought of a D3/4.....

eightinavee said:

Good news that its running well again,one point I would add is that there is no need at all to cut the carpet or mats etc - they will carefully pull out and back far enough to access the pump.The next owner may not like the sight of a carpet cut in half,it does not give a good impression of the skill of the techs who have cared for the car.
Some DII's are still in very good condition and worth a reasonable sum - one of my customers recently paid £7500 for a decent example because he cant bear the thought of a D3/4.....

Click to expand...

well said! i did mine at the weekend, 5 mins to get to it via the carpet folded back, 10 mins to swap pump, easy job really!! but likewise no real need to cut the carpet!