300 diesel power loss and smoke. Help!

[charliechitlins]

I've recently replaced injectors and the car was running well for a few thousand miles.
I do still have a leaky pre-chamber that I can't resolve, so I'm living with a bit of leaking (it smells!).
Starting recently, when I'm cruising or decelerating slightly, the car loses a bit of power...I can feel it "drag" a bit, and this is accompanied by a cloud of smoke from the tailpipe.
Any ideas?
Thanks in advance!

[charliechitlins]

Also...stepping on the accelerator clears it up...if it were a gas engine, it would be something like a spark plug going south...loading up the cylinder then clearing out unburnt fuel...but it's not gas, of course.
Anybody?

[1992 300D]

What color is the smoke?

[Zeitgeist]

It sounds like you're losing boost pressure. Check your vacuum plumbing and routing.

[charliechitlins]

Originally Posted by 1992 300D

What color is the smoke?

Kinda hard to say looking at it in the rearview at speed...but it isn't black...probably not blue...probably white.

[charliechitlins]

Originally Posted by Zeitgeist

It sounds like you're losing boost pressure. Check your vacuum plumbing and routing.

Thanks...I will.
I've lost power like this before, but I didn't know it could cause smoke, too.

[1992 300D]

Yeah well I hope it's blue and not white because white is usually bad.

[Zeitgeist]

This is why I was just suggesting that you swap in a pressure activated wastegate ^

[charliechitlins]

Originally Posted by Zeitgeist

This is why I was just suggesting that you swap in a pressure activated wastegate ^

Sorry...I don't understand.
I didn't see a suggestion of swapping in a pressure activated wastegate.
Did you confuse my thread with another?
I'm assuming mine is vacuum activated.
I'm not familiar with a pressure activated one.
Could you explain?
Thanks!

Edit>>>
I found it...your post was directed to 92 300.
I found that thread.
I'll have to check it out and see if it's out of my league, ability-wise.

[Zeitgeist]

You might just find that it's a simple cracked vacuum line or junction, so I'd continue down that diagnostic pathway for now. I made that reference to the other gentleman 'cause he already has the car torn apart for an unrelated issue, and now is the perfect time for some preemptive maintenance.