Thread: Disco2 problems

Originally Posted by revird

Hi, I'm Pete from Australia, I am not a mechanic, just a low wage earner, so trying to fix my disco2 myself, youtube has been very good so far. ok what is happening is first start up in the mornings I can put it in to R or D and press the accelerator all the way to the floor, nothing happens, motor just idles, drop into N or P and rev a bit and drop into gear and off I go. now what I have tried so far... I have replaced the Fuel Filter. I have replaced the Fuel pump, due to running out of diesel at 1/4 tank, plus pump was noisy. I have checked and freed up a sticky waste gate. there is no fuel leaking from the Fuel regulator. I have checked for oil in the harness, clean as a whistle. I have done an oil and filter change on the transmission. I hope someone can point out a few more things for me to look at, thanks in advance..

Where are you and do you have any error codes in the ECU?

Originally Posted by djam1

Where are you and do you have any error codes in the ECU?

Gladstone mid north South Australia, and no codes are showing using an app called Torque that reads a bluetooth OBD2 device

A D2 is not full OBDII so that device might have limited ability to read the codes

I am between the Wirrabara and Melrose and have a Nanocom but it’s for a TD5 Defender that might be able to read the codes not sure

Could it be a problem with the switch on the auto which prevents the vehicle from being started unless it is in Park? Or maybe it's unrelated?

Originally Posted by revird

Hi, I'm Pete from Australia, I am not a mechanic, just a low wage earner, so trying to fix my disco2 myself, youtube has been very good so far. ok what is happening is first start up in the mornings I can put it in to R or D and press the accelerator all the way to the floor, nothing happens, motor just idles, drop into N or P and rev a bit and drop into gear and off I go.

now what I have tried so far...
I have replaced the Fuel Filter.
I have replaced the Fuel pump, due to running out of diesel at 1/4 tank, plus pump was noisy.
I have checked and freed up a sticky waste gate.
there is no fuel leaking from the Fuel regulator.
I have checked for oil in the harness, clean as a whistle.
I have done an oil and filter change on the transmission.

I hope someone can point out a few more things for me to look at, thanks in advance..

Do you get any fault light on the dash?
If you first start car in park will it rev?
Is it only on first start in the morning or at every start?

Was this happening before the auto service?

Really need to get a proper test device nanocom or hawkeye and see if it's throwing codes - You can search for a willing member here https://www.aulro.com/afvb/electroni...ostic-systems/

And would be good to check the throttle with said tester

Hope this helps?

Cheers Lemo

Originally Posted by revird

Hi, I'm Pete from Australia, I am not a mechanic, just a low wage earner, so trying to fix my disco2 myself, youtube has been very good so far. ok what is happening is first start up in the mornings I can put it in to R or D and press the accelerator all the way to the floor, nothing happens, motor just idles, drop into N or P and rev a bit and drop into gear and off I go.

now what I have tried so far...
I have replaced the Fuel Filter.
I have replaced the Fuel pump, due to running out of diesel at 1/4 tank, plus pump was noisy.
I have checked and freed up a sticky waste gate.
there is no fuel leaking from the Fuel regulator.
I have checked for oil in the harness, clean as a whistle.
I have done an oil and filter change on the transmission.

I hope someone can point out a few more things for me to look at, thanks in advance..

Hi Pete, I'm pretty local as well, I have been having the exact same problem on a d2a, however I have a nanocom and have had some experience with these vehicles for a while now, despite this I haven't been able to correct the problem, it's not throwing any fault codes that seem related at all.

It's almost as though the accelerator pedal is not attached, I'm not using this vehicle at the moment but from memory it's worse when it's colder weather and only seems to be first time is started for the day, is a real mystery.....
Maybe try doing a bleed immediately before starting it, see if that helps?

Originally Posted by revird

.....
I have checked for oil in the harness, clean as a whistle.
......

From this, is it safe to assume a TD5 then?

Originally Posted by revird

Gladstone mid north South Australia, and no codes are showing using an app called Torque that reads a bluetooth OBD2 device

No amount of fiddling or waiting for Torque or any OBD capable reader would connect to my brothers TD5.(his '03).

And my understanding of the TD5, back then, was that it didn't need to be ODB2 compatible .. so I doubt you'll get any codes out of Torque.

'00 V8 works pretty much spot on with Torque tho, and I can clear codes easily using it .. but not via the common ODB2 tools in the TD5.

Could be that your MAF sensor is faulty. Takes 30 or seconds for the ECU to determine that there is no signal and use default values. You'll need someone with a Nanocom or similar to see what values the MAF is putting out as the D2a isn't OBD2 compliant. Or try disconnecting the MAF although you may only get the same result....

Google how to test the MAF with a multimeter, this may assist in determining if that's the cause of the issue. Can't see it being the throttle potentiometer if it works ok the rest of the time.