hi all my 2004 deisel auto has started to misfire, its really bad when I first start it up misfires and white smoke coming out of offside exhaust, thought it may be my injectors, but they seem to be ok.

any help would be much appreciated.

Welcome to the Club, Stuart,

 

White smoke can mean fuel is not being burnt properly, for whatever reason.  The offside exhaust indicates that the problem lies within the left side of the V6 engine, so concentrate on that side.

 

There are products that can help, I believe, although I am not a fan of some additives.

 

Regards,

 

Peter. 

Thanks Peter, changed one of the Injectors made no difference, changed the fuel filter that didn't help either. even changed the mass airflow sensor that didn't help either..

 

anyone with any other suggestions I would be grateful.

Hi Stuart,  

 

I have had a good look around as white smoke, or indeed any colour smoke is of interest to me, having the same engine as yourself.

 

There appear to be several reasons, although there are many prophets of doom,

 

It could be incorrect injector timing, defective injectors, or low cylinder pressure.  You have checked out the injectors, so that can be ruled out.

 

I have come across one comment which could be the cause   ----   low quality fuel, which is a relatively cheap fix, and that kind of fix is a good one.  I have been advised that supermarket fuel is not the best for a performance engine, and that an occasion tankful of the very expensive performance diesel is a good thing.

 

If the smoke is only on start up it could be pure water vapour, but the misfire seems to indicate something else.

 

I had my car put through thee Terraclean service, basically to check it out and it did a lot of good to the engine giving me 53 mpg on a 90 mile run mostly on a motorway with a 50 mph restriction.

 

Hope this helps,

 

Peter. 

 Hi Stuart

My first thought would have been Glow plugs

Suprised you have not had more response from members.

Good luck with it.

Stan.

Maybe a good idea to do a compression test?

Have you tried connecting your car to a OBD2?-See if it throws up a fault to one of the 3 cylinders on that side?