Help

[ash77]

my toyoya avensis d4d t4 2.2 58 plate mk3 keep getting gray blue smoke and smelly as well when slow down and pull away for about 50 sec at a time and mpg is about 31 round town and 42 long run ??

[Raistlin]

Hi, Welcome to the club... Enjoy

Grey or blue smoke from the exhaust.

You notice grey smoke coming from the exhaust when you start your car.

The smoke may or may not disappear after the car is warmed. If it is, it is less noticeable.

The smoke may have a bluish tint to it.

Possible causes:

1. The engine's piston rings may be worn.

The Fix: Replace piston rings. (Generally not a DIY job)

2. The engine's valve seals may be worn.

The Fix: Replace valve seals. (Generally not a DIY job)

3. Damaged or worn valve guides.

The Fix: Replace valve guides. (Not a DIY job)

[FROSTYBALLS]

Hello Ashley - welcome to Toyota Owners Club

[Uncle Buck]

Hi Ashley - this sounds very much like the well-known issue of regeneration. Basically when the engine/exhaust system is getting heavily clogged with soot, a fifth injector will squirt unburnt fuel straight into the exhaust manifold in order to burn off the offending particles at a very high temperature. This will issue a few bursts of gluey-grey smoke and is often accompanied by a burning smell. The way to avoid all this is to give the engine a decently long run to get it up to full running temperature at least once a week, but more importantly try to avoid lots of short stop/start trips whenever possible.