so i read other threads about "To remove or not to remove...?" but am not sure what i should do.

I bought the 190D 2.5 Turbo and it is slow on take offs when the engine is cold. I am talking, i will floor the throttle (not to the kickdown tho) and the engine will slowly and i mean slowly creep up the RPMs. 0-30mph like 25 seconds. it barely accelerates.

So i changed the both fuel filters, did a diesel purge, and to test if i have a clogged tank screen, i am running via a mini tank in the engine bay. still slow. i have also checked the linkage for full travel and it does make it to the IP stop.

It is drivable like this, but annoying. i am hoping to buy a 5 speed tranny swap kit later, but that should only fix the odd shifting issues of the automatic.

before i get the 5 speed tho, i would like to remove the Alda (or tweak it, but i cant see how i could do that with so little room) and then install the K1 spring kit.


What else should i check regarding the slow takeoff?

Thanks

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Grey '91 350SDL 214k Dad's car
Beige '81 240D 4 Speed 254k SOLD
Blue '82 300D 225k SOLD
White '95 E300D 46k SOLD
Blue '87 190D 2.5 Turbo 315k SOLD
Brown '80 240D 4 Speed 716k SOLD
Beige '80 300D N/A 119k SOLD
Blue '85 300D Model 186k T-Boned

Diesels need heat. Have you ever noticed a big rig taking off cold? Not much power and they don't stomp on it cold. I've seen diesels allowed to come to operating temp. before getting on them.
Anyway, I would also say that my 300SDL is mostly a dog as well when cold.
I ran about a 12 (Edit** should read 14 seconds- perhaps 13 since I was going uphill a bit ** End Edit) 0-60 last night - engine up to temp,
but that would be as you said, much worse on a cold engine.
IMHO, heavy acceleration on a cold diesel is not good, I don't do it (prepped and ready for flames).
I would not mess with ALDA yet.
How does the car perform at operating temp?

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1986 300SDL 201K Daily Driver
1984 300D In Progress
1989 240GL 196K Swedish Brick
1984 300SD -- Sold 289K
------------------------------

Hook up a boost gauge even if just temporarily. The turbo should be blowing for all it's worth before 30 mph. You should feel the turbo involved around 2000 rpm and as much as the hand of God as you're going to feel by 2500 rpm.

Don't sweat the ALDA question. It goes on as easily as it comes off. Take some good acceleration time measurements as you have the car, pull the ALDA, repeat all the measurements. If there's a big difference, you'll know where to focus your diagnostic efforts. If there's no big difference, you'll know where not to focus your diagnostic efforts. If that sounds like too much work, disconnect the line from the intake manifold to the ALDA and check performance. Report back your findings.

IMO, the ALDA is the difference between fast and faster, not slow and fast.

Sixto
87 300D

My sd and d are both extremely slow at startup. Like, I can floor it and it just slowly picks up speed. As soon as it heats up just a tiny bit I have almost full power.

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1981 300SD 512k OM603

i will take a video tomorrow when it will be especially cold (40* in houston ) then you can see how slow it is. and this will be using the mini tank in the front.

the car does take off, even with a cold engine, once the rpm get to about 2100rpm. before that, it might take me 20+ seconds to get there. there is something that is off.

__________________

Grey '91 350SDL 214k Dad's car
Beige '81 240D 4 Speed 254k SOLD
Blue '82 300D 225k SOLD
White '95 E300D 46k SOLD
Blue '87 190D 2.5 Turbo 315k SOLD
Brown '80 240D 4 Speed 716k SOLD
Beige '80 300D N/A 119k SOLD
Blue '85 300D Model 186k T-Boned

This won't affect your outcomes as much as you're noting, but I did notice a distinct difference in very cold (for me, 20F and below) between synth 5w40 and a heavier dino oil, during takeoff. Just a lot of resistance to work against.
My wagon starts off slower than my sedan in the cold, and I can't figure out why. Might just be all the little things adding up, like linkages, valves, compression, timing, etc. Neither one's ALDA has ever been messed with. In your case, I'd check out my overboost protection before I even looked at the ALDA.

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If you feel it is the ALDA, adjust it first is my suggestion.

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Gone to the dark side

- Jeff

so could my overboost protection be messed up where it removes boost?

__________________

Grey '91 350SDL 214k Dad's car
Beige '81 240D 4 Speed 254k SOLD
Blue '82 300D 225k SOLD
White '95 E300D 46k SOLD
Blue '87 190D 2.5 Turbo 315k SOLD
Brown '80 240D 4 Speed 716k SOLD
Beige '80 300D N/A 119k SOLD
Blue '85 300D Model 186k T-Boned

The ALDA cuts off fuel. As boost pressure rises, it cuts off less and less. If there's overboost, a valve cuts off the boost pressure reading, which causes the ALDA to drop the fuel amount back to the bottom level. If the tube for reading the boost is clogged, it's the same; bottom level fuel, the boost is is there but is being wasted.

Boost doesn't come into play at the very start of acceleration though. I suggest adjusting the ALDA, along with the thinner oil. I've done both, not only is there better acceleration but the transmission also started shifting properly.

You should check the injection pump timing.

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

AND then:

1.Clogged lines from intake to ALDA(NASTY EGR crap) AND clogged Y-30

Check the lines from the intake (#138) to the Y-30 to the ALDA (#103).

2.Cracked ,Loose or Missing Connectors/Lines in the system.

Even if you have Boost,without this system in order,you cannot enjoy the
benefits .

Locate and correct these and you won't have to signal to the Engine Room
by Semaphore Flags to Make Turns for for 2500RPM.

Attached Thumbnails

   

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'84 300SD sold
124.128

You've done well so far by checking the fuel system and linkage but something besides the ALDA is your problem. These engines aren't total dogs without the turbo, the non-turbo 190D 2.5 should hit 60mph around 15 seconds. Even with a totally plugged or dysfunctional ALDA the car should not have an acceleration problem that bad.

Does it smoke at all? If it does, what color?

Check if your brakes are dragging.
Check that you're really starting in 1st or 2nd instead of 3rd or 4th.
Check if the turbo spins freely (with the engine off).
Check boost pressure.
Check if the EGR is stuck open, then make a block off plate while you have it removed.

I'm looking forward to that video, it should help a bit. Please also video a few seconds of the engine bay with it running while you've got the camera out.

You have a problem, I have the solution: Overload protection Good luck!!!

Nope. "The car does take off, even with a cold engine, once the rpm get to about 2100rpm" eliminates the overload circuit as a possibility. The problem is def. not lack of boost or enrichment.

Try shimming the ALDA. The 20mmk crush washer used on the turbo oil feed banjo bolt worked just fine for me.

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http://superturbodiesel.com/images/sig.04.10.jpg
1995 E420 Schwarz
1995 E300 Weiss
#1987 300D Sturmmachine
#1991 300D Nearly Perfect
#1994 E320 Cabriolet
#1995 E320 Touring
#1985 300D Sedan
OBK #42