1KD-FTV Hiace: Potential turbo issue?

[adamkerrnz]

Haven't been on these forums in a while! Since I've upgraded from the old bubble car (Echo)...

Acquired myself a 2007 (import) Hiace, 1KD-FTV 3.0L diesel motor.

Besides all the normal "DPF filters are shit" comments, I have what I believe to be an unrelated issue, and seek confirmation on what it might be... short of paying Toyota my hard earned cash to diagnose something I may be able to fix myself.

Symptom:

Engine temp: Warm, Driving conditions: All, Motorway & 50k zones, Weather: All.

When allowed to idle, a "blockage" appears to occur, seemingly in the exhaust system. something rattles and its gutless (because the turbo isn't getting any power to spin), but if you give it some foot, it sounds like a blow off valve releasing (the van "sneezes" I swear). The turbo will then spool and its off like normal. I have a feeling its something to do with the wastegate, but I'm unfamiliar with the total setup of the turbo with this motor. I believe it to have a variable geometry turbocharger, unsure if this feature is enough to cause this kind of blockage... then again, could a wastegate do this?

Im 90% sure this is not a DPF related issue, on the phone, toyota seemed to agree. Have never had a DPF indicator light, and my driving habits lend well to running with a DPF (Long stints on the motorway)

Has anyone else experienced this kind of behaviour from their Hiace?

Cheers!

[matt dunn]

have not had that fault but I do hear that they are bad for EGR valves which could cause a similar problem.

[glowee]

the fault is not with the turbo, have seen a couple of these at work,
after the dpf unit there is shutter valve, when dpf burn is carried out the shutter valve closes so raise exhaust temps etc,
when your revving it and it "sneezes' that's the shutter valve releasing the pressure in the dpf unit,
Dpf burn offs a depeneded on your driving, if long running you wont get it as often and if short trips around town you will happen alot more
also recommend running 5w30 low ash oil in it as well, and dont overfill
hope this helps and let me know if you need any more info
cheers