Td5 Automatic Discovery 2a suddenly running rough and no top-end power

Quote:

---

Originally Posted by cds900

OK, hands up, who said MAF sensor? Well done!

Unplugged that and the engine revs again, nasty noise and silliness gone. Didn't try a road test, but I'm sure it's WAY better. Would n't rev over 2500 rpm (in N) previouisly,

I'm assuming that the ECU has a base map for airflow based on the engine speed, and that this is what it runs from when the MAF is disconnected? Can I drive home like this is the question?

Airfilter was nice and dry inside, did check there too. Hoses and connectors as suggested all looked ok too.

Thanks heaps, CHris

---

Try to go for a drive if you can, if you can't due to lock down , then partially warm it up for a couple of minutes then do a stall test ( should be around 2800 rpm ) this will go some way to replicating actual load on the engine.

Don't know what part of Warrnambool you are on but a quick run on Caramut rd or Hopkins rd and see if it goes ok Hopkins Rd has a good hill to test if it will go under load.

Sounds a bit like when a turbo hose delaminates internally in a D1. Not sure if D2’s are the same.
Cheers,
Woolly.

Oh dear, went for a test drive to exercise by the beach, its still a basket case. Seems to be getting worse if anything. Took 3 tries to start coming home, starts and dies. No lights on dash, no warnings, all looks normal. Might check the the hoses next as suggested. Thanks, Chris

Quote:

---

Originally Posted by cds900

Oh dear, went for a test drive to exercise by the beach, its still a basket case. Seems to be getting worse if anything. Took 3 tries to start coming home, starts and dies. No lights on dash, no warnings, all looks normal. Might check the the hoses next as suggested. Thanks, Chris

---

If it is, it will be the hose out of the turbo heading to the intercooler.

This is what it does

http://www.slunnie.com/coppermine/al...l_P1010007.JPG

As a get you home job, just stripe the insides out of it and refit it. Thats only as a get you home fix though.

http://www.slunnie.com/coppermine/al...l_P1010010.JPG

check if you can hear any fuel pump noise with ignition on engine off.

Quote:

---

Originally Posted by discorevy

check if you can hear any fuel pump noise with ignition on engine off.

---

Yes, my money is on the in tank fuel pump.

The injector pumps will pull up enough fuel to idle the engine and run under low load. One of my friends was able to travel slowly on a dirt road, as soon as he got on the bitumen the car lost power. Changed the in tank pump and problem was sorted.

It is a job that can be done at home.

Yes, sadly fuel pump was the answer, and indeed there was no fuel pump noise. Actually turned to a no-start and had to be towed. Of course I'm away from home with no manual or tools and busy with work.

Big thank you to AB Auto's in Warrnambool for correct diagnosis and repair, would definitely use them again if I'm down this way with a problem.

Might change the injector seals as a preventative measure when I get home.

The horrible rattly sound is gone now, and the engine is sooo much smoother under part and trailing throttle.

Thanks all forumists for your help and attention!