I had a problem similar to what you describe when I first acquired my car. For me, it was the shut-off solenoid; it was hanging between open and close and I only discovered the cause inadvertently. The symptom was intermittent fuel starvation; at times the car would run OK, idle ok and accelerate, but gradually run out of power. FWIW, I don't believe anyone else has experienced this problem, here, yet.
One other problem that was quite perilous that I encountered was the cruise control accelerating the car on its own. I disconnected the servo and never had the problem again. Also, the end of the torsion bar on one of my Mercs rusted off; It broke during a "panic stop" in heavy traffic...I'd check that suspension point on both sides of the car.
good luck
--- On Thu, 7/5/12, Trish Dougherty <purrfectharmonyfarm@wifi45.com> wrote:
From: Trish Dougherty <purrfectharmonyfarm@wifi45.com>
Subject: Re: [diesel_mercedes] Re : '81 300sd running weird & smoking
To: diesel_mercedes@yahoogroups.com
Date: Thursday, July 5, 2012, 8:30 PM
Got two filters coming to NAPA first thing in the morning. Kevin came home to bring me oil and took off the clear filter & blew it out then reinstalled. REAL JOB INTERVIEW!!!! Hope I make it there. I should it drove OK around the property today. On Thu, Jul 5, 2012 at 7:20 PM, Nate <vwnate1@yahoo.com> wrote:
Look at the clear plastic intake fuel screen right between the steel tube and the injection pump , left inner fender area ~ if there's any crud in that screen , remove it and blow it out backwards & re install , go buy two more of these and be _SURE_ to only accept the clear ones so you can -SEE- the dirty fuel before it clogs & causes poor running .
If there's lots of crud in there , I'd replace the spin on secondary filter too , fill it with Power Service DIESEL KLEEN before installing the new filter , Power Service products are found in truck stops , Auto Zone , O'Reilley's and other FLAPS .
Also , look at the firewall where the throttle linkage has a pivot , it was white plastic when hew but often crubles and allows the linkage to flop instead of only allowing rotation , if this is bad , make up a new part of cork or whatever and begin searching for a new one by price . when this bushing thing goes bad , it allows the linkage to liftbup instead of rotate and open the fuel in the injection pump .
Don't panic ! most of the time it's some simple thing or a loose screw etc.
-Nate
PurrFect Harmony Farm
Ennis, TX
http:/purrfectharmonyfarm.intuitwebsites.com
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