[diesel_mercedes] Throttle Linkages

 

A while back a piece of stamped steel linkage broke and I replaced it with a close but not quite matching linkage and adjusted the rods to compensate .

To - day I decided to park my '84 TD that runs and has perfect throttle response , next to my '84 Coupe and match and adjust the rods equally .

I was able to do this to all the rods except the vertical one connecting the I.P. to the linkage , I had to lengthen it significantly more than the Wagon's one to make it all work .

I now have vastly improved " tip in " throttle response although the loping @ idle is still present  and the engine doesn't return quickly to idle when I release the throttle at freeway speeds , this is why I decided to tinker with it to - day .

I cleaned and lubricated all the ball pivots , most were dry yet again .

-Nate


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Re: [diesel_mercedes] Loping OM161

 



No , never TMI ~ information is good , I would have diagnosed it the same way but was wondering if there's another way...

I don't have my FSM handy , I thought it was supposed to have over 400 # , no ? .

The trick with getting a good used I.P. is selecting one , there's no practical way to test it in the junkyard .

The steel injector pipes are easy to test and clean , just use starting fluid or brake cleaner with the snorkel , it'll be obvious if there's any blockage , I doubt you'll find any although some crud may blow out .

-Nate
        Bogy   wrote :

I loosened the injector lines one at a time and the #4 hardly affected the operation of the engine. The other 3 almost killed the engine when I loosened them. Hence #4 is not producing. Then I swapped injectors #2 and #4 to eliminate or identify the injector as a possibility. Problem stayed with #4. Then a compression test revealed 350, 340, 350, 340 so I could eliminate the engine proper. The problem was in the #4 part of the engine.

That leaves the injection pump.

I suppose its possible that there is a clog in the #4 intake/exhaust that only shows up when it's going faster than compression test cranking speeds. But I'm not going to check that next. Tomorrow I am going to take the lines off and reattach them away from the engine and screw the injectors on them. They will be spraying into the air. But I may be able to see a difference on the #4  line that will verify the pump is not delivering properly to #4. If that fails to reveal anything then I will check the manifolds for blockage next.

After that I will take the top off the IP to see if something is happening during #4 injection window that only happens during the #4 injection window. If the controller section is doing something odd I can put the control section from a 5 cyl pump on it. Otherwise I will need a known good used pump.
TMI?
Bogy.

"Hardware eventually fails. Software eventually works"                 - Michael Hartung



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Re: [diesel_mercedes] Loping OM161

 

I loosened the injector lines one at a time and the #4 hardly affected the operation of the engine. The other 3 almost killed the engine when I loosened them. Hence #4 is not producing. Then I swapped injectors #2 and #4 to eliminate or identify the injector as a possibility. Problem stayed with #4. Then a compression test revealed 350, 340, 350, 340 so I could eliminate the engine proper. The problem was in the #4 part of the engine.

That leaves the injection pump.

I suppose its possible that there is a clog in the #4 intake/exhaust that only shows up when it's going faster than compression test cranking speeds. But I'm not going to check that next. Tomorrow I am going to take the lines off and reattach them away from the engine and screw the injectors on them. They will be spraying into the air. But I may be able to see a difference on the #4  line that will verify the pump is not delivering properly to #4. If that fails to reveal anything then I will check the manifolds for blockage next.

After that I will take the top off the IP to see if something is happening during #4 injection window that only happens during the #4 injection window. If the controller section is doing something odd I can put the control section from a 5 cyl pump on it. Otherwise I will need a known good used pump.
TMI?
Bogy.

"Hardware eventually fails. Software eventually works"                 - Michael Hartung


From: "vwnate1@yahoo.com [diesel_mercedes]" <diesel_mercedes@yahoogroups.com>
To: diesel_mercedes@yahoogroups.com
Sent: Friday, July 29, 2016 9:44 AM
Subject: [diesel_mercedes] Loping OM161



7.29

Good morning Bogy ;

I too am struggling with a loping issue , how did you diagnose the specific cylinder ? .

-Nate
         Bogy    wrote :

At least I think it does. It still has a lope and it is still the #4 hole. But with very even compression and injector swapping not moving the problem, I have no choice but to look at the pump. So does anyone here have a known good working injection pump for a 1980 240D for sale.
 
Bogy

"Hardware eventually fails. Software eventually works"                 - Michael Hartung







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Posted by: Bogy Wan Kenobi <polespearbogy@yahoo.com>
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[diesel_mercedes] HPR Bio -Diesel Fuel

 



Me too ! .

My Son the racer , got me to try it , he loves it in his 2003 Chevy Express one ton motorhome and his 2006 (?) Chevy dually crew cab pickup truck .

So far , NO DOWNSIDE .

-Nate
        Brian   wrote :

Glad to hear that fuel is working out!



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Re: [diesel_mercedes] Fuel Economy Check '84 300CD Automatic

 

Glad to hear that fuel is working out!


From: "vwnate1@yahoo.com [diesel_mercedes]" <diesel_mercedes@yahoogroups.com>
To: diesel_mercedes@yahoogroups.com
Sent: Friday, July 29, 2016 11:53 AM
Subject: [diesel_mercedes] Fuel Economy Check '84 300CD Automatic

 
Pure HPR fuel used , NO FUNGUS ! .

The clear plastic intake screen remains nice and clear , no tint to the liquid fuel inside .

Still a few tiny bits of crud here and there , not enough for me to bother blowing it out (!YAY!) .

329 miles 17 MPG .

What happened ? .

I added a fuel pressure gauge as I'm tweaking the IP's fuel transfer pressure .

The darn gauge failed as I was taking my Son out to dinner Wednesday evening , by the time I got home it was pissing fuel out , sharply reducing the fuel economy although the car was running great , smooth as silk , apparently the HPR fuel works like increased Cetane , making the engine run much smoother .

I removed it and ordered up a new American made Marshal liquid filled gauge , we'll see how long it lasts .

-Nate



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[diesel_mercedes] Fuel Economy Check '84 300CD Automatic

 

Pure HPR fuel used , NO FUNGUS ! .

The clear plastic intake screen remains nice and clear , no tint to the liquid fuel inside .

Still a few tiny bits of crud here and there , not enough for me to bother blowing it out (!YAY!) .

329 miles 17 MPG .

What happened ? .

I added a fuel pressure gauge as I'm tweaking the IP's fuel transfer pressure .

The darn gauge failed as I was taking my Son out to dinner Wednesday evening , by the time I got home it was pissing fuel out , sharply reducing the fuel economy although the car was running great , smooth as silk , apparently the HPR fuel works like increased Cetane , making the engine run much smoother .

I removed it and ordered up a new American made Marshal liquid filled gauge , we'll see how long it lasts .

-Nate


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[diesel_mercedes] Loping OM161

 

7.29


Good morning Bogy ;

I too am struggling with a loping issue , how did you diagnose the specific cylinder ? .

-Nate
         Bogy    wrote :

At least I think it does. It still has a lope and it is still the #4 hole. But with very even compression and injector swapping not moving the problem, I have no choice but to look at the pump. So does anyone here have a known good working injection pump for a 1980 240D for sale.
 
Bogy

"Hardware eventually fails. Software eventually works"                 - Michael Hartung



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[diesel_mercedes] Re: heading for the river

 



Terrific picture Max .

-Nate
        Max    wrote :

Heading for the river, again.  Max

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