1983 300sd sluggish start - Page 2 - PeachParts Mercedes-Benz Forum

Diesel911 · #16 09-11-2012, 07:02 PM

Quote:

Originally Posted by ibenz

my car does this too... the problem goes away for me if you turn the ignition 3 times off and on before you start it... my car only does it after i drive it... its seems to be a vacuum pressure issue or something for me. not sure if this helps your situation but i can relate.

The Vacuum Swith on the Steering Colum is the only Vacuum Related thing that the Key moves.

Diesel911 · #17 09-11-2012, 07:11 PM

Quote:

Originally Posted by Secondaries

Nope! The round piece on top of it. Don't unbolt anything. See the round piece with the Bosch logo? That has to come off.

Does the ALDA have anything to do with the amount of Fuel at 10 mph?

toomany MBZ · #18 09-11-2012, 07:16 PM

It seemed to on mine.

turbozeke418 · #19 09-11-2012, 07:29 PM

Quote:

Originally Posted by Diesel911

Does the ALDA have anything to do with the amount of Fuel at 10 mph?

I sure as hell hope so

Secondaries · #20 09-11-2012, 08:33 PM

Quote:

Originally Posted by Diesel911

Does the ALDA have anything to do with the amount of Fuel at 10 mph?

If 10mph is happening before 2000rpm, then yes.

turbozeke418 · #21 09-11-2012, 08:36 PM

Quote:

Originally Posted by Secondaries

If 10mph is happening before 2000rpm, then yes.

I'm not sure...the tach is inoperable. I bought a new updated amp for it so hopefully that'll be in soon.

turbozeke418 · #22 09-12-2012, 04:02 PM

I adjusted the ALDA all the way open (counter clockwise) and there is a noticeable difference. Still not taking right off but it is better.

toomany MBZ · #23 09-12-2012, 06:02 PM

It's possible to unscrew the ALDA altogether:
ALDA removal (2 large nuts) 300 SD 1981

This may help.

turbozeke418 · #24 09-12-2012, 06:23 PM

Quote:

Originally Posted by toomany MBZ

It's possible to unscrew the ALDA altogether:
ALDA removal (2 large nuts) 300 SD 1981

This may help.

COOL...should I unscrew the entire ALDA unit? Or will removing the nut and screw that I loosened be enough?

toomany MBZ · #25 09-12-2012, 09:41 PM

There is a spinning captive nut on the IP, you may be able to see the stationary nut on the ALDA itself, this will allow you to understand which way to loosen it.

Secondaries · #26 09-12-2012, 11:42 PM

Quote:

Originally Posted by turbozeke418

COOL...should I unscrew the entire ALDA unit? Or will removing the nut and screw that I loosened be enough?

I suggest keeping the alda intact, just turn the screw out a bit. Its set a little conservatively from the factory but it does a good job of making your car not smoke. Smoke means less power and mpg. And its ugly.

t walgamuth · #27 09-13-2012, 03:29 AM

Quote:

Originally Posted by turbozeke418

I just checked with the PO and he did a valve adjustment a month ago and replaced all fuel filters. I took off the air cleaner and the air filted was loaded with oil and looked old. There was alot of oil in it too. So I don't know if he's just saying he did the valve job or actually did one. Once the car gets over 10 mph it goes and keeps pulling. I was just really surprised at how slow it is up to 10 mph compared to the non turbo W123.

How do I adjust the ALDA? I've seen posts about a screw or something but couldn't find anything that would adjust?

The non turbo car will always feel a lot quicker just off the line because as VS noted it carries a 346 diff instead of the 307 or 288 (if an 85). The turbo engine also needs to spool up the turbo and when coming off the line that makes the engine feel as if it has to push it to get it going before it can make any power. The turbo lag is gone in about the distance to cross a two lane street so crossing streets in the turbodiesel is always more challanging than in the non turbo.

The SD is also heavier than the 123 body cars especially the earlier non turbo models so it just does not feel as snappy right off the line. think of the SD as a highway cruiser, which it is and it can get better fuel economy than the 123 with its more slippery body.

turbozeke418 · #28 09-13-2012, 03:41 AM

Quote:

Originally Posted by t walgamuth

The non turbo car will always feel a lot quicker just off the line because as VS noted it carries a 346 diff instead of the 307 or 288 (if an 85). The turbo engine also needs to spool up the turbo and when coming off the line that makes the engine feel as if it has to push it to get it going before it can make any power. The turbo lag is gone in about the distance to cross a two lane street so crossing streets in the turbodiesel is always more challanging than in the non turbo.

The SD is also heavier than the 123 body cars especially the earlier non turbo models so it just does not feel as snappy right off the line. think of the SD as a highway cruiser, which it is and it can get better fuel economy than the 123 with its more slippery body.

OK. It all makes sense. I would think it's taking off A LOT better now than before. I'm not concerned about MPG since this will be running on WVO just like the wagon has been doing. I will be using this to commute a lot for flight school in the next few months so having it cruise nicely will help. It sounds like a totally different car inside compared to the wagon too. That thing is loud as hell at 80 and this thing is quiet! Thanks for all the help.

cho · #29 09-13-2012, 07:55 AM

Quote:

Originally Posted by t walgamuth

.....so crossing streets in the turbodiesel is always more challanging than in the non turbo......

so true mate,so true .....

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