Exhaust smoke

Hello, Dave here, contributing to RepairPal and providing expert advice since 2010. A Toyota TownAce in 19991 is not a North American exported vehicle. The Van Wagon was last sold in the US in 1989. None were produced with Diesel engines -- so this is definitely all going to be guesswork, as your vehicle was imported into the US as a non US vehicle. I'm not sure what to suggest, as this vehicle has no American technical resources to draw on. You will also probably have problems finding a technician who can work on it and parts that can be easily obtained. White smoke is typically water vapor or coolant related. If the smoke is blue or grey, it's more oil based. If it's black it's usually fuel based. Sounds more like a possible oil consumption or blow by issue instead as a less white and more blue smoke concern. Reach out to some shops near you to see if someone is willing to troubleshoot -- https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.