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PeachParts Mercedes-Benz Forum (http://www.peachparts.com/shopforum/index.php)
-   Diesel Discussion (http://www.peachparts.com/shopforum/forumdisplay.php?f=15)
-   -   Anemic / Slow Acceleration Problem SOLVED!!! Cleaned Switchover Valve - WOW! (http://www.peachparts.com/shopforum/showthread.php?t=221946)

toomany MBZ 06-12-2009 01:34 PM
[QUOTE=mbmc;2223071][FONT=Verdana]

Again, though, tell me the condition of the veneer on the wood trim is controlled by vacuum and I’ll reach for the MityVac and look for a line to test.


LOL

compu_85 06-12-2009 02:16 PM
On the 350SDLs the overboost system is not smart in any way, when the boost pressure gets high enough to trip the switch on the intake it grounds the switchover valve, which always has power. When the car is overboosting the system feels very strange, the power pulses as the fuel is turned up and down.

W124s activate the switchover valve when the cruise control is set. W126s do not. :confused:

-Jason

winmutt 06-12-2009 02:50 PM
Quote:
Originally Posted by tbomachines (Post 2222943)
The way a turbo works is to take exhaust gases and use them to spin an impeller that draws air into the engine. As soon as you let off the gas, there is much less exhaust flowing through the turbo, and nothing causing it to spin. If you suddenly lift, you can hear the turbo spool down. Likewise, the turbo won't spool up until a certain RPM--it is about 1500-2000 in our cars (My tach is broken, sorry if this isn't exact:P) because there aren't enough exhaust gases flowing through the thing.
Of course. There is still air moving through but not enough to build pressuire. The theory being applied in the quote from easley is one you would see with gassers, not diesels.

Chas K-S 06-16-2009 11:08 PM
post-op
 
Well, after cleaning the banjo bolt and replacing the line (I broke the line on my first turn of the ratchet it was so brittle), my car is a little--very little--more peppy. It wasn't totally clogged, so my guess is that I may be having a different problem with my fuel supply. Maybe it's the biodiesel I've been running, or maybe I've got algae from the biodiesel...I've already changed the fuel and air filters.

I'm also thinking it could be vacuum leak related to the transmission. The car shifts before getting to 2200 rpm every gear. Seems like it should shift higher?

Ah, the joy of trouble shooting...

winmutt 06-16-2009 11:13 PM
Adjust your bowden cable. Do some searching.

Chas K-S 07-16-2009 03:41 PM
So I cleaned the OPR and replaced the line that goes to the banjo bolt. I'd say I've got noticeably better performance. After doing that, I replaced all my injectors and took the car in for a valve adjustment. Now I'm really Rockin'! No seriously, the car shakes too much still, but I've got great power. I might still follow advice and get rid of some of the vacuum components like the EGR...Thanks for the post and advice.


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