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  #1  
Old 04-01-2010, 01:42 PM
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240d auto does 25mph on hills

I am supposed to collect an 83 240d from Vermont this weekend, but I just found out it only does 25mph on a hill. I only saw the car briefly 2 weeks ago, and drove it around the yard, but not on the road(no plates, etc)

I know it's a long shot, but is there a "most likely" cause, such as slipping bands, etc and what are my chances of adjusting them on the spot. Alternatively, I have a good auto box recently pulled from an 86 300td...would that fit? >I also have a 4 speed manual from a 240d, with the pedals, driveshaft etc, put think it would be a pita to change away from my shop.

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  #2  
Old 04-01-2010, 02:29 PM
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Plugged fuel filters?

Jim
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  #3  
Old 04-01-2010, 02:31 PM
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Quote:
Originally Posted by smiffy6four View Post
I know it's a long shot, but is there a "most likely" cause, such as slipping bands, etc and what are my chances of adjusting them on the spot. Alternatively, I have a good auto box recently pulled from an 86 300td...would that fit? >I.

If engine races and car moves slowly, it's the bands.

86 tranny has different bolt pattern.

Jim
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  #4  
Old 04-01-2010, 02:35 PM
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I would also guess filters or possibly throttle linkage binding or air intering fuel system?

Mike
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  #5  
Old 04-01-2010, 02:42 PM
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Thanks for the replies so far.

I don't think the problem is engine related; the engine revs quite happily to full speed in neutral and 1st gear. Apparently, the car will cruise at 65mph, but slows on a hill to about 25. I haven't been able to "interview" the driver yet
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  #6  
Old 04-01-2010, 03:45 PM
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Change the fuel filters first. My SD did exactly that. There may be a reason that they are plugged ie fouled tank pick up. But begin there. Of course, it could be tranny but also highly likely it is fuel related. Start with the cheap stuff first.
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  #7  
Old 04-01-2010, 03:46 PM
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Quote:
Originally Posted by smiffy6four View Post
Apparently, the car will cruise at 65mph, but slows on a hill to about 25. I haven't been able to "interview" the driver yet
That is classic clogged filters. I would highly recommend changing both fuel filters, and see what happens.
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  #8  
Old 04-01-2010, 04:05 PM
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One possible cause on the 1983 240d is the linkage. There are two small rubber parts {sleeves) in a vibration damper motion transfer item getting out quite away from the firewall. They basically rot off with age. Mercedes sells them for about a dollar a pair. I just cannot locate the part number right now and it is elusive. No I did not leave a rubber strip when I left him but the general performance was much better.

There is a chance this is your issue. The linkage turns and meshes at that point and the deterioated parts eliminate full transfer of the linkage motion. Kind of common issue on your year.

Been there myself when picking up a 1983 240d in southern New Jersey. I could not afford the automatic so got a standard four speed. The reason you think it revs well is because there is no load at the time you are manually playing with it. What you want to verify is the linkage is enabling the lever on the injection pump to hit the end stop with your foot on the accelorator.

Actually a poor name for the pedal in my opinion on a 240d automatic. I patched together a temporary mcguyver type of arrangement to get the car home.

Of the 1100 miles 700 were through a snowstorm and the road eventually became unusable. So I stopped with the engine ideling all night and it was warm. No possibility of even driving a little further to a restaurant or motel.

The owner said just before I left. Had he known that was the problem he would have not sold the car. He just thought it was always just very slow.

If the car has been sitting for a long time you really should jack up each wheel and check for dragging calipers. The calipers do not sit well in northern climates in my opinion.

The way any decent running 240d works is you cannot lose any built up momentum on a decent hill. If you slow down you cannot pick the lost momentum back up. There are many hills steep enough that if you hit the bottom at 25mph thats about what you will go over the top at if you are lucky. Do take a fuel filter with you as well as a few hand tools. An old filter may or may not be adding to the problem.

Mercedes 240d cars will help you learn a lot about the generally ignored effects of gravity. I had actually forgotten about it till aquiring my first 240d.

Last edited by barry123400; 04-01-2010 at 06:37 PM.
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  #9  
Old 04-01-2010, 04:13 PM
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Bah! It's called downshifting. If you lug it, you're out of the power band.

Could be an air bind too- pointing it uphill can shift a bubble and block the fuel flow in the little plastic filter.
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  #10  
Old 04-01-2010, 04:16 PM
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PS do that 4speed swap.
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  #11  
Old 04-01-2010, 05:10 PM
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Quote:
Originally Posted by barry123400 View Post
One possible cause on the 1983 240d is the linkage. There are two small rubber parts {sleeves) in a vibration damper motion transfer item getting out quite away from the firewall. They basically rot off with age. Mercedes sells them for about a dollar a pair. I just cannot locate the part number right now and it is elusive.

There is a chance this is your issue. The linkage turns and meshes at that point and the deterioated parts eliminate full transfer of the linkage motion. Kind of common issue on your year.

Been there myself when picking up a 1983 240d in southern New Jersey. I could not afford the automatic so got a standard four speed. The reason you think it revs well is because there is no load at the time you are manually playing with it. What you want to verify is the linkage is enabling the lever on the injection pump to hit the end stop with your foot on the accelorator.

Actually a poor name for the pedal in my opinion on a 240d automatic. I patched together a temporary mcguyver type of arrangement to get the car home. The owner said if he had known that was the problem he would have not sold the car. He just thought it was always just very slow.

If the car has been sitting for a long time you really should jack up each side and check for dragging calipers. The calipers do not sit well in northern climates in my opinion.

The way any decent running 240d works is you cannot loose any built up momentum on a decent hill. If you slow down you cannot pick the lost momentum back up. There are many hills steep enough that if you hit the bottom at 25mph thats about what you will go over the top at if you are lucky. Do take a fuel filter with you as well as a few hand tools. An old filter may or may not be adding to the problem.

Thanks, this is exactly the sort of info I was hoping to find. Thank-you :-)

I am planning to take a whack of tools along, a spare battery, an extra spare, a fuel filter and a tow bar.
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  #12  
Old 04-01-2010, 05:29 PM
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It is best not to fix it in front of the current owner until after you own the car. Don't even surmise what might be wrong unless it is drastic. You want the price to drop, not climb.
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  #13  
Old 04-01-2010, 05:45 PM
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[QUOTE=Junkman;2439432]It is best not to fix it in front of the current owner until after you own the car. Don't even surmise what might be wrong unless it is drastic. You want the price to drop, not climb.[/QUOTE

If the price drops even 1 penny then they will owe me. I got the car for nothing
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  #14  
Old 04-01-2010, 07:04 PM
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Quote:
Originally Posted by smiffy6four View Post
a fuel filter.
Make sure to take both fuel filters, the plastic primary filter and the spin on secondary filter.
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  #15  
Old 04-01-2010, 07:31 PM
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If you have a place there to bunk up for a day or so. I would drive the car locally for a fair distance. The general economy of the american region you will be travelling back through was hard hit many years ago.

It was rich from a light industrial standpoint at one time. We always enjoyed running the route from Nova Scotia to Ontario through that region. To the best of my knowledge there is no bus or passenger train service throughout the area anymore.

Automotive service is not that easily available as true service stations with mechanics became convienience stores and gas outlets long ago. Or just vanished with time. To compound that the few that are still left are usually booked up solid with work.

Driving around locally for a day or two might even be enjoyable and if any bugs are going to materialise they should early.

They do have a solution for breakdowns though. Fairly long hauls on flatbed tow trucks to a regional centre where there is service. Of course you would have to bear the going rate for transportation.

At one time a fellow citizen asked if we might became an annex of the USA on the east coast. I simply informed him you would be treated pretty much like northern Maine if it occured. That is not particularily good by the way.

To give you some perspective. Forty years ago I could rent a cabin in the blue mountains of Vermont for three dollars a night. And a hotel room for the three of us was as low as three dollars and fifty cents including breakfast. I think it cost five dollars to fill the gas tank from pretty much empty as well. That may have been a little earlier though.

Some of the roads where hard to use as an attempt to restrict north south trade at the time seemed to be in effect. . One main north south highway was called the airline route. That may have been because you should traverse the hundred mile length of it in an airplane. Otherwise it was just a serious attempt at humour in my opinion.

They gradually improved it over the forty years and it is not bad now. I only wished video cameras had been in common use back then. People today might not believe it if they saw it. Like driving on a roller coaster. The hills were so steep and choppy you could not see the road over your hood at times. To compound that the road was very substandard in width.

You could get a car repaired easily enough almost anywhere back then. The bill for doing it was generally not punative either if required. Strange as well there where also lots of repair parts in the area. Today you will wait for parts in many cases. Of course to be fair there where not the multitude of brands and labels to contend with back then. The big three really ruled.

Another strange episode occured once in the middle of nowhere. There were litterly hundreds of new york state trooper cars in the area. Just south of the Ontario border. They stopped us at a roadblock and told us the indians where restless.

They would not actually stop us from crossing reservation territory but it may be dangerous. They informed us they would not come to our rescue if we used the road.

I knew the indians source of income was from the travellers along that road using their gas stations etc. It was probably an attempt to block them being used. So I asked the state troopers if there where any cars coming through from the other way with arrows in their trunk lids. We did take the detour though.

The earlier part of that time period seems to have been the period where people had the essentials of life basically. There might have been greater social cohesive habits and better interrelationships between people. No credit cards and the true excesses of personal needs or keeping up with the neighbours just had got really underway. The economy could easily bear the expansion and excess then so it happend. Almost everything changed.


Last edited by barry123400; 04-01-2010 at 07:57 PM.
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