WOW!! Adjust your throttle linkages! - Page 3 - PeachParts Mercedes-Benz Forum

pdrayton · #31 04-27-2007, 06:59 AM

More information than you could shake a stick at about adjusting control linkages for W123s at
http://pauldrayton.com/uploadfiles/merc/Service/W123/Index/616/30AcclCtrlSys.html

ImBroke · #32 04-29-2007, 09:10 AM

Pulled a couple of rods off of my 82 and did a comparison.. The rod going down to the ip on the 85 (aka slow poke) was 10 mm shorter. Adjusted it, and holy cow, the car feels much quicker now. It was 36 seconds to 60, (very dangerous), now it is 17 (much better, but still slower than the 82). The rod on the rear of the ip wouldn't come close to the stop either, but it does now.

winmutt · #33 04-29-2007, 04:01 PM

Stock 85 will always be slower to 60 than an 82. However I bet if both are properly tuned the 85 would be able to outrun at top speed.

When I adjusted min I turned the max fuel stop in a few turns. Will this ever give better performance or is the stop after the max fuel screw adjustment has already hit its peak?

Carson357 · #34 05-17-2007, 05:16 PM

just adjusted mine on my 1979 300sd, before adjusting power was good, but now everything seems better, before it would feel like i washaving to push way too hard get to the kick down button. once all was finished i had to re adjust the 10mm bolt at the fire wall linkage back to the way it was new, i believe someone messed with the rod at the injection pump before and that threw everything off. all values can be found in the cdrom manual

blankenship · #35 07-20-2007, 04:21 PM

interesting post, but i'm an idiot, so there's some stuff i'm not understanding:

i have A TON of slack on my '85 300TD, and want to make sure i do these adjustments right. (i'm attaching photos for reference)

i can turn the rod/linkage coming out of the firewall and affect the linkage at the green arrow immediately, but the green arrow linkage moves a good 3/4" or so before affecting any movement on the rod going down to the IP (purple arrow). it doesn't seem to affect the IP rod until the little roller in the linkage on top of the valve cover (red line) reaches the stop point shown. see the second photo that shows the roller? it's got a flat spot on it, and seems to have worn away a bit of the slot up there...does all that look normal?
if you turn it all the way to full throttle, it looks like there's 2mm space or so at the throttle stop down below. anyway, all this translates into having to push the accelerator pedal down what seems like a good couple inches before feelin' her go.

(i've got the adjuster nut (below the green arrow) positioned in the slot all the way towards the driver's side fender as (as 'carnut' recommended), but STILL there's all this slack!) can you explain which other linkages i should be adjusting and how to do it without negatively affecting anything?

Doktor Bert · #36 12-20-2010, 08:27 PM

Quote:

Originally Posted by MBeige

Throttle stop.

I LOVE that color!!!!!

dablk1 · #37 12-21-2010, 08:32 PM

The last time I tried to adjust mine it really messed up my shift points. Still not sure what I was doing wrong.

MBeige · #38 12-22-2010, 12:21 AM

Quote:

Originally Posted by Doktor Bert

I LOVE that color!!!!!

Thanks Dok!

Doktor Bert · #39 12-22-2010, 01:37 AM

Careful when adjusting those rods...

I saw one 722.120 not too long ago that would had no engine braking when going downhill. The owner had a shop rebuild the tranny and still NO engine braking. They asked me to look at the car and I discovered that when going downhill, if I lightly touched the throttle, the transmission would downshift and engine braking was available.

The end result was $3,000 transmission job because of mal-adjusted linkage....Robert

winmutt · #40 12-22-2010, 09:03 AM

My 87 has like 1/4 or more gap at the end. Cant wait to get that adjusted

LandYaghtLover · #41 12-22-2010, 09:53 AM

Old thread, good info. Will try it on the gasser.

Wusha · #42 06-22-2019, 07:38 AM

Quote:

Originally Posted by 300SD81

Tighten the one to the left, can't remember which way I shifted the one on the right.. I just messed with it until the IP linkage hit bottom exactly when the pedal hits the kickdown, but before pushing it.

Could you reupload the picture?