[Schulisco]

Originally Posted by wazzz

Thomas, Porsche sell new injectors again for 3.2. Don't know since when, but see this post I wrote a few weeks ago.

Thanks Gilles, this is a new information to me, interesting. You mean Rose Passion shop?

https://www.rosepassion.com/en/parts-porsche-911-1985-eu-3-2-coupe-manual-gearbox-5-speed/engine-and-fuel-feed-36/injection-86/93060612001-p31523-injector-valve-original-mounting-montage-origine-89-399-31523

In any case, I've learned that newly manufactured parts no longer guarantee perfect function these days. Nevertheless, I would reinstall the old injectors. Furthermore, I would test both the old and the new ones with measuring cups to measure the amount of fuel injected. If only one injector is defective, it can lead to the heavy smoke we're seeing here, which can unsettle and panic the owner...

I always start with the simplest and last things done to the car ... to me the coincidence is obvious that one of the last things done must be the cause for the smoke...