Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 12-16-2013, 09:10 AM
Slow Attack Submarines
 
Join Date: Jun 2006
Location: NYC
Posts: 242
Stalls on uphill start

So here's a new one, that I think confirms that my (slightly) rough idle note is fuel related, perhaps with the lift pump.

Started the car on a moderately steep hill, put it in drive as soon as oil pressure came up, and it died! The parking brake and main brakes were still applied, so it wasn't from load, it was entirely due to height differential between the tank and the motor.

Started it back up, waited a few minutes, and she drove off fine. I haven't had any issues at all with lack of power (cruises up as fast as I'd like on the freeway) and I just replaced both filters and the in-line filter fuel lines. Going to throw in a can of Startron next for good measure, probably drain the tank and clean the strainer once it's run down toward empty.

It's amazing what minor problems crop up in 30 year old cars... problems you don't see in most other vehicles because they don't last long enough to manifest.

__________________
1992 300D 2.5T 249k - Parked with a bad transmission
1981 300SD 142k - Daily driver
Reply With Quote
  #2  
Old 12-16-2013, 09:35 AM
Lurker Since 2006
 
Join Date: Jun 2006
Location: Apalachicola Natl Forest, FL
Posts: 89
I'd look for air intrusion from between the filter head and the hardline. The slightest air leak there could allow the fuel to drain back to the tank when parked nose up.

On level ground, the tank is actually higher than the plumbing, keeping fuel up near the lift pump by way of gravity.

Since you were able to restart the car rather quickly, that tells me the lift pump itself is fine, properly drawing fuel up the lines.

I'd inspect all rubber... from the hardline to the lift pump, and from the lift pump to the filter head.

Also check the hand primer. If you've got the plastic headed twist lock type, they've been known to leak, especially after 30 years.

HtH..
__________________
1985 MBZ 300D (DD, 240k, unmuffled hellion!)
1982 MBZ 300D (372k, retired for parts)
1981 MBZ 300D (575k, parts pig)
Reply With Quote
  #3  
Old 12-16-2013, 10:12 AM
Smoker's Avatar
Fast Attack Submarines
 
Join Date: Aug 2013
Location: South Central Florida
Posts: 473
Right after i did my cylinder head swap mine would start, stumble, die. Then restart, repeat if put in gear.

The first time I just let it warm a little and off we went, then I tracked down a couple of fuel leaks. It got better. Found one more, got better.

Now if it's started on a really cold day without the block heater it starts right up, gives a bit of a hiccup fairly quickly, then settles in, so still an air leak somewhere. Gonna do primary filter and hoses when I replace the a/c compressor this coming weekend.
__________________
Eric, CPO, Submarines, retired.
Here's a sig line...
Mine: '68 Corvette LS1/4L65E, 83 240D, 2000 GMC 4x4, 08 FLSTC Anniv
Hers: '72 Corvette 454/4spd, '99 MB SLK, '93 Metro vert, 78 240D, '92 Silverado, '65 Fjord Rustang, '59 Fjord Fairlane, '17 Slingshot.
Reply With Quote
  #4  
Old 12-16-2013, 10:41 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
go to the dealer, and order the 3 clear lines and the washers... then pull your intake manifold and change them.
odds are good it's the line from the lift pump to the fuel filter, but it could be any of them.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #5  
Old 12-16-2013, 11:46 AM
Slow Attack Submarines
 
Join Date: Jun 2006
Location: NYC
Posts: 242
Those clear lines are next up, and the braided injector return lines. Are the clear lines a specific part? I'd think that any same-sized hose would fit on the banjo nipples.

I also don't see where the intake manifold fits in... this is on the 617, not the 602.

Thanks all for the ideas.
__________________
1992 300D 2.5T 249k - Parked with a bad transmission
1981 300SD 142k - Daily driver
Reply With Quote
  #6  
Old 12-16-2013, 11:55 AM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
yeah, on the 617 the manifold is not in the way.

I've never tried to change JUST the hose, I replace the entire assembly, fittings and all from the dealer.
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #7  
Old 12-16-2013, 03:31 PM
Diesel911's Avatar
Registered User
 
Join Date: Sep 2007
Location: Long Beach,CA
Posts: 37,324
Quote:
Originally Posted by pleiades View Post
So here's a new one, that I think confirms that my (slightly) rough idle note is fuel related, perhaps with the lift pump.

Started the car on a moderately steep hill, put it in drive as soon as oil pressure came up, and it died! The parking brake and main brakes were still applied, so it wasn't from load, it was entirely due to height differential between the tank and the motor.

Started it back up, waited a few minutes, and she drove off fine. I haven't had any issues at all with lack of power (cruises up as fast as I'd like on the freeway) and I just replaced both filters and the in-line filter fuel lines. Going to throw in a can of Startron next for good measure, probably drain the tank and clean the strainer once it's run down toward empty.

It's amazing what minor problems crop up in 30 year old cars... problems you don't see in most other vehicles because they don't last long enough to manifest.
Since thev 1981 300SD is the only one you have that is around 30 years Old I am guessing that is the one that is having the issue.

Park it on a Hill again and try pumping a lot on the Hand Primer. If that works it is likey your Fuel Supply/Lift Pump is having issues.

The replacement Valve Kit fot the Lift Pump is cheap and if you scrounge up an O-ring for the Push Rod inside of the Pump you have done a compete rebuild on the Pump.

Old Style Hand Primers with the shiny Alumium body can also be problematic and cause Air Leaks. I don't know if a worn out would could cause the Fuel to magrate back to the Tank or not.

I also don't know if the Fuel Pressure Relieve/Overflow Valve could have a hand it the issue.

Partially Plugged Tank Screen. I don't know if that can have an effect either.

I don't remember how much but there is a spec for a Vacuum Reading on the Fuel Inlet side of the Fuel Supply/Lift Pump and that is easier to set up then a Fuel Pressure Gauge is.
__________________
84 300D, 82 Volvo 244Gl Diesel
Reply With Quote
  #8  
Old 12-16-2013, 09:11 PM
Registered User
 
Join Date: Jul 2008
Posts: 3,740
Pull your fuel pressure relief valve on the injection pump and stretch the string out to 27mm I believe it was....As others said its an air leak problem....make sure you have a new primer and also check the fuel lines under the tank....may also look at the rack damper bolt too...

__________________
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 09:46 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page