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  #1  
Old 10-21-2008, 04:35 AM
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Join Date: Jul 2006
Location: MIll Valley, CA
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1999 E300D started briefly then died....then won't start

Today my normally trusty E300D started just briefly then died...then wouldn't start again

...fires some and stumbles but won't light up.

Tips on things to check ??

Clogged fuel filter?

?????

Warren C.
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  #2  
Old 10-21-2008, 06:21 AM
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Location: Nashua, NH
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Is your tank low (less than 1/2 full) and are you parked with the nose up by chance?

The most likely cause of what you are describing is the fuel system has lost its prime due to a failure in one or more o-rings. Most likely culpret is the pre-filter o-ring. This becomes a problem when the tank is less than half full and/or the car is parked nose-up.
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Marty D.

2013 C300 4Matic
1984 BMW 733i
2013 Lincoln MKz
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  #3  
Old 10-21-2008, 12:46 PM
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Join Date: Feb 2004
Location: Walnut Creek, CA & 1,150 miles S of Key West
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Assuming the GP light isnt stuck on.....if it is, go to dieselgiant.com and follow the testing procedure for the W123 on his page.

When it stumbles keep cranking the starter until you are 100% certain it is running. That extra 2-3 seconds wont hurt the starter.

If it wont start even then it is almost certainly the pre-filter oring.
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  #4  
Old 10-21-2008, 01:10 PM
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Thanks for the tips.

Tank is 1/4 full but car is sitting level.

O rings sounds right to me.......I did run a couple of tanks of b100 through the car several months ago....possibly softening the O rings

I'll replace the filter and O rings...after I get back from my vacation..........this time with Viton set.


Warren C.
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  #5  
Old 10-21-2008, 06:20 PM
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Location: Nashua, NH
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Quote:
Originally Posted by Warren C View Post
Thanks for the tips.

Tank is 1/4 full but car is sitting level.

O rings sounds right to me.......I did run a couple of tanks of b100 through the car several months ago....possibly softening the O rings

I'll replace the filter and O rings...after I get back from my vacation..........this time with Viton set.


Warren C.
1/4 tank level is about the same as 1/2 tank uphill. If you want to prove it is caused by a leak you can dump 5-10 gallons of fuel in and then it should prime easier and run. If your clear lines aren't too dark you ought to be able to see if there is air in them too which would also point to a leak as being the cause.
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1984 BMW 733i
2013 Lincoln MKz
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