Fuel milage loss after repair - Mercedes-Benz Forum

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post #1 of 1 (permalink) Old 09-17-2006, 05:06 PM Thread Starter
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Date registered: Feb 2006
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Unhappy Fuel milage loss after repair

Hello all,

Am quite at a loss over the issue: Avalve almost directly under the injection pump. The valve has 4 3/8" connection onto it, one (the front one) going to the fuel filter assembly, two middle to the firewall (I assume to the tank) the forth to a side pipe also going to the rear of the vehicle.
This infamous valve begun lealink about two weeks ago, I removed it capped the hoses went to my dealer and purchased the restore kit (one O-ring and a washer) they called it a "monovalve". The kit resolved my leak.

Car info:
93 300D (5 cyl inline Diesel) auto tranny, 256,000 miles.

Now the question:
My mileage went from around 31-32 on highway to 22-24.......checked all around the unit to see if I had disconnected any hoses or damaged any other items in the process, but was unable to see any thing damaged.

What could I have possibly done by repairing this valve to make this drastic change in my fuel milage?

Any hints/suggestions are greatly apreciated.

axm1955 is offline  
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