Thread: TD5 complete loss of power

Uh oh.
After WOT acceleration, I noticed momentary lack of power, then as I backed off to check, complete failure as though someone switched off the key. At this point I could smell burning engine oil so feared the worst.

After coming to stop I had a look around and could see no evidence or remaining smoke. Checked oil level, no problem. Restarted and after a big puff of black smoke (unusual) engine runs fine. As I was moving to a safer place off the highway, I noticed very low boost. Stopped again and realised modulator pipe has blown off. Refitted, and boost is back. Next time I make a WOT acceleration same thing happens, complete engine cut requiring key cycle to fix. Black smoke at restart. Sometimes it only runs for a few seconds then stops. After a few minutes it then ran OK again.

I am hoping that the oil smell was just a spray of oil from within the modulator pipe onto the manifold or something, but who knows. Could the pipe blowing off under heavy acceleration caused other damage, due to non functioning wastegate?

Any ideas why I now get engine failure during heavy acceleration?

There are no unusal noises, turbo sounds ok, I can still here the centrifugal oil filter winding down at shutdown so I suppose oil is at least still circulating.

Appreciate any help or suggestions. Times like this I wish I had bought a nanocom!!

Cheers,
Scott.

Confirmation - de-laminated intercooler hoses, visually that appear normal inside and out, feel a bit soft when squeezed - can stop a TD5 suddenly with no warning!

This was repeatable, get engine above 3500RPM then back off. As soon as boost drops the hose would block up. Air flow readings on nanocom drop to 0 and exhaust note changes. Engine dead. I have recordings if anyone is interested.

Replaced intercooler hoses and all running smooth now.

(I had also changed the fuel pump, and tried with MAF disconnected, but that made no improvement)