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Over revving

Kia Sorento 2005 4x4 2.5 diesel 200000 miles
Had some white smoke on start-up although there was a lot more this time but it went after a while and then black smoke started coming out if the engine was under load, accelerating in 3rd or 4th. After about 5 miles the revs shot up to about 4k with no throttle with loads of black smoke out the back. They returned to normal after a few seconds and I drove on, set the cruise for about 55mph. Going through a town I had to accelerate from stop. Got into third and it starts revving again work more black smoke. I put it in 4th and dumped the clutch and this brought the revs back down. It died after a couple of seconds and now won't even turn over. I'm not sure if this is terminal or not yet. Anyone have any ideas what might have caused this?
Digweed from Ireland 7 years ago  
DI
8 reports 
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