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  #1  
Old 10-16-2009, 04:43 PM
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83 - 617 will stall at 2000 rpms

I have to spray starter fluid to get it started and when I hold my foot about half way down it runs and sounds great but if I just hold it there it will decrease rpms and stall after just a few minutes. I'm trying to remove the alda because it can't be adjusted, but I can't get the alda to break loose of the big nut under it. The big nut will turn but it is attached inside to a spring or something. Any suggestions on how to get the thing off or maybe what else could be causeing the problem. Thanks for your help.

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  #2  
Old 10-16-2009, 04:57 PM
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Check your fuel filters. If you have black dots in the prefilter change it and the other one and treat your tank with biocide.

If that doesn't do it I will be surprised.

Oh, and if you keep spraying starter fluid in it you will live to regret it!....blown head gasket or worse.
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Old 10-16-2009, 05:27 PM
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Just put a new primary filter on it the spin on was changed about a month ago and I cleaned the screen in the tank.
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  #4  
Old 10-16-2009, 05:32 PM
Craig
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Was it doing this before you started messing around with the alda?
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  #5  
Old 10-16-2009, 05:57 PM
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Quote:
Originally Posted by paul46 View Post
I have to spray starter fluid to get it started and when I hold my foot about half way down it runs and sounds great but if I just hold it there it will decrease rpms and stall after just a few minutes. I'm trying to remove the alda because it can't be adjusted, but I can't get the alda to break loose of the big nut under it. The big nut will turn but it is attached inside to a spring or something. Any suggestions on how to get the thing off or maybe what else could be causeing the problem. Thanks for your help.
NO MORE ETHER!!!

You probably have an air leak, likely at your primer pump (old style, while knob you loosen, then pump; new style black plunger).

The ALDA nut is captured on the bottom of the unit and will come off with ALDA. Hold the ALDA still and turn the nut counterclockwise when viewed from the top.
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Old 10-16-2009, 08:16 PM
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Craig; Yes thats why I started messing with it, because I read a thread on how it can affect the idle etc...

BoiseBenz; So you think I need a new hand pump? Mine does have a White top and it does seem to work when I use it.
I backed out the large nut to give me enough space to get two adjustable wrenches one on the IP nut and the other on the alda underside, tryed with everything I have and could not break it loose. I will try again tomorrow.

What happens if you unscrew the top plate of the IP that the alda is on and rotate it counterclockwise? Will it unscrew from under the alda or what?
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Old 10-16-2009, 10:47 PM
Craig
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Just checking. This doesn't sound like a ALDA problem, it sounds like a lack of fuel or an air leak.
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  #8  
Old 10-17-2009, 12:07 AM
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I thought it might be an air leak but the question is: Will it run at high rpms with an air leak? I can get it running and there isn't any bubbles visable in the primary, so if its sucking air it must be the hand pump or somewhere else after the primary filter in the IP. It doesn't smoke when running so I tend to think its not getting enough fuel. I'm just a relative beginner at this. I've only had a diesel for three years now and only worked on it (them) when I have time which isn't very often.

There's one other problem I now have. When checking the banjo bolt thats connected to the intake manifold and eventually ends up at the alda I broke the line. If I can remove the alda do I need this line? or can I plug the intake with another bolt?

I really appreciate any and all input.
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Old 10-17-2009, 12:15 AM
Craig
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OK, have you tried running it with the fuel filler cap off to verify it's not due to the tank vent?

Have you tried feeding the engine directly from a bottle of fuel to verify it's not a clogged fuel tank strainer or fuel line?

I believe you can plug that line if you eventually end up removing the ALDA.
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Old 10-17-2009, 02:24 AM
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Yes I have run it from a bottle, but had the same problem, so now its back on the tank. I just poured 6 gals of off road diesel in the tank to make sure it was not too low on fuel. I figured off road diesel was ok to use until I get it back on the road.
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Old 10-17-2009, 07:23 PM
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Quote:
Originally Posted by paul46 View Post
BoiseBenz; So you think I need a new hand pump? Mine does have a White top and it does seem to work when I use it.
I never had one fail before being "automatically upgraded," so I can't tell you the exact mechanism; many people like to change them "just in case."


Quote:
Originally Posted by paul46 View Post
I backed out the large nut to give me enough space to get two adjustable wrenches one on the IP nut and the other on the alda underside, tryed with everything I have and could not break it loose. I will try again tomorrow.
I use a 27 and 30-mm "service wrench" like for hydraulics--very thin and short, but big enough to fit the nut.
Quote:
Originally Posted by paul46 View Post
What happens if you unscrew the top plate of the IP that the alda is on and rotate it counterclockwise? Will it unscrew from under the alda or what?
Don't know.
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1983 300D (228k, frau Auto)
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www.engineeringworks.biz
1987 300SDL junker 170k
1982 300SD junker, 265k
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  #12  
Old 10-17-2009, 08:12 PM
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Quote:
Originally Posted by BoiseBenz View Post
NO MORE ETHER!!!

X2 This is why my friends 300D is no more. (I wasn't there for it, but I saw the aftermath)
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  #13  
Old 10-18-2009, 01:02 AM
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Well today I went and got an 8mm x 1.00 bolt and pluged up the intake where the banjo bolt was., then after reading some more on the alda removal I pulled up on the alda which is still connected to the top plate an put an adjustable wrench between the top plate and the IP about a 1/2 rise. I still couldn't get it started.

Is the white thing next to the alda that I guess regulates vacuum with the throdle necessary? it T's with a vacuum line that goes to the transmission. I removed it to try and get the alda off. I still have not been able to get the thing off.

I had a bottlle of svo and decided to use it under the hood. I used the overflow line from coolant container stuck one end in the bottle of svo the other in the end of the primary filter and pumped the hand pump about 30 times. I cranked it and she started!
I even got it to idle. The alda still had the wrench under the top plate so I was ablre to work under the hood with the car running and pulled the wrench out from under the alda.
I was able to pull the alda all the way up and place it back down on the IP while messing with the engine rpms. It didn't seem to make any difference in idle or anything, when it was up or down. I could see inside the IP when it was running and saw that the oil would rise in the IP almost to the top with increased rpms then fall when back to idle.

I screwed the alda and plate back down on the IP, but did not reattach the white vacuum regulator. Drove the car about three mile then back with no problems. It shifted ok and exceleration was good. So I guess the white vacuum thing doesn't do much of anything noticable.

Anyway, I still don't know if I had an air leak that was removed by pumping the hand pump 30 times, or was it just the svo, or maybe the tank line as was suggested. I'll do more testing. I have to get some more diesel. put it in a bottle pump the heck out of it and hope it starts. If it does I'll pull a new line from the tank and clean the screen again.
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  #14  
Old 10-18-2009, 02:00 AM
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i would guess that the svo being thicker than diesel sealed an air leak
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  #15  
Old 12-11-2009, 04:10 PM
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Update - What now remove IP rack limiter & adjust?

Its been a while since my last post. Here's what I've done.
1. removed, cleaned and soaked injectors in sea foam.
2. dumped MMO in the injector holes soaked for about two weeks
3. replaced all filters, oil change, new hand pump & injector return lines.
4. adjusted the valves several times until perfect.

After that it still did not want to start so I used wd40 and eventually got it to start with throttle open not at the idle position. It sounded beautiful when running but would still not idle. I hated to do it, but I went back to a 50% mix of diesel and SVO from the bottle under the hood (since the tank had straight diesel) just to see what would happen. Well, it started and idled perfect. I pumped the diesel out of the tank and put a 50% mix of SVO and diesel back in it. Then I drove it about 15 miles round trip almost made it home when it conked out on me. It would not start so I had to tow it home. Today I went out in the cold and it started right up and idled, but it seems to want to run away and not go back to an idle.

Does anyone know where I can get an IP manual, because I think I'm gonna pull the IP and see if what I can do with that. maybe clean it out & remove the rack limiter or make adjustments....

What do you think?

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