Just found a 99 PSD that the owner said has one bad injector. I also got a quote from the mechanic to just fix the one. Are these thing better off to be all changed at once. It is his daily driver and so far I can't really tell if there is any loss of performance. Of course I am not pulling anything when I drove it. A slight grayish smoke during acceleration.

At 5K I am tempted to get it as I sold my other 7.3.

Anything to look out for?

Thanks!

Noel