Problem after injector & throttle body service

[Bilz111]

I just bought a 2004 bmw 530i.As it was driven 62000 kilometers i got a service and the guy also suggested me to get the injectors and throttle body serviced as well.After service,next day the car took a long self before starting and there was smoke from exhaust which smelled like un burnt fuel.PLS HELP!!

[brettski]

Welcome to the Werkz.

Some of the injector cleaning solutions (used through fuel tank) do produce smoke after use, but if the smoke continues after a few days let us know and we'll see what other issues it might be.

Does the smoke dissipate after a few minutes of the engine starting and warming up?

[Jack Dabsy]

We used to use a device that intersects with the fuel line and introduce some high-alcohol fluid (isopropyl) to flush/clean the injection system... Worked a treat and it did take a short while to settle back down!

[Bilz111]

Originally Posted by brettski

Welcome to the Werkz.

Some of the injector cleaning solutions (used through fuel tank) do produce smoke after use, but if the smoke continues after a few days let us know and we'll see what other issues it might be.

Does the smoke dissipate after a few minutes of the engine starting and warming up?

Yup it only does it on cold start up and then disappears.....also the smoke smells like un burnt fuel....

[brettski]

If you start the engine and then stop it after the smoke disappears, let it sit for 30 minutes with the hood up and then restart it, do you still get the same smoke?

Once you have a half empty tank, try filling up with your normal fuel and see if the smoke is still there and as heavy as it is currently.

[Jack Dabsy]

Unburnt fuel OR Burnt oil... Can be a similar smell...
What colour is the smoke?