2003 Toyota Land Cruiser Black Smoke

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ROCKYARUN
  • MEMBER
  • 3 POSTS
Our copany own 25 Land cruisers.
we bought 4 diesel engine(IHZ) land cruisers 2003 model, and installed turbo charger in 2005 in all 4 vehicles. These vehicles have done 25000 kms.

After installing turbo charger i found there is a excessive BLACK smoke in the exhaust. I checked the oil leak from turbo charger but seems to be ok. The engine oil level remains same, it is not going down.
The problem is in only 4 vehicles we have other turbo fitted same engine vehicles are normal and no smoke

Please suggest what will be the cause
May 7, 2006 at 1:32 AM
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LOSONE
  • ✓Experienced Mechanic
  • 1,616 POSTS
Black smoke is rich burning. It may be the turbos are responding fast enough causing a build up of fuel. Check the waste gate control system and they may need to be adjusted so they react faster.
May 8, 2006 at 8:13 AM

Suggested Repair

Black smoke indicates a rich mixture. Check the wastegate control system and adjust it so the turbos respond faster, which may prevent fuel buildup.

Conversation Summary

The owner of several 2003 Toyota Land Cruiser diesels (listed as IHZ) reports excessive black exhaust smoke after turbochargers were installed at about 25,000 km. Oil level is stable and no turbo oil leak was found; other similar turbo vehicles do not smoke. The expert says black smoke means rich burning and recommends checking and adjusting the wastegate control so the turbos react faster.

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