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  #1  
Old 10-04-2003, 01:38 PM
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Location: HELENA,MT
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Black Fuel

i was changing my fuel filters this am (77 240d ) all the fuel came out black. the pre filter had black specks which would disintegratee when touched. this car is new to me with numerous other issues. is this the dreaded algea problem?

thanks john m
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  #2  
Old 10-04-2003, 01:56 PM
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Sounds like it. I had so-so luck with Diesel Doctor. Clears up but returns after a few weeks. Someone recommended Biopor or something like that.

Just what the heck does algae find appetizing in Diesel fuel?

Sixto
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  #3  
Old 10-04-2003, 02:33 PM
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A few black spots ain't so bad, I had strings of algae in my tank.
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Old 10-04-2003, 03:23 PM
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Sounds like algae to me. My father turned me on to BioGuard, made by Valvtect. He uses it in his trawler with great success. It's easy to get and only takes 1/2oz per tankful after an initial 1oz treatment. Not only does it kill algae and bacteria, but it also renders them able to be burned up and clears them out. See link below.

BioGuard

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Old 10-04-2003, 05:00 PM
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Location: Central, NJ
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Madsen

I just went through a month of hell with the very same problem. I had the same condition, tiny black specs clogging my filters and injectors. My '79 300D ran terrible and loud. I thought it best to kill them. This decision was both correct and NOT correct. I killed them alright (forget what I used) and thought the problem was solved. But things got suddenly much worse.

The massive die-off caused the filters (easily changed) and the injectors (not easily cleaned) to become more clogged than prior to my committing mass biocide on the little bugs. My teeth would rattle when idling.

I ended up siphoning the tank and pulling and cleaning the strainer. (Not too hard). Than I had to go through two "cleaning" applications of Redline Diesel Catalyst (12 ozs. per 20 gallons) to get the injectors back to normal again.

Can't find Diesel Purge in NJ, if I could I would have used it. Things are fine now. Good luck.





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I kid proofed the house....but they still get in
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  #6  
Old 10-04-2003, 11:17 PM
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Location: Northern Virginia
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Why does the BioGuard bottle have two caps on top?

Ken300D
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Old 10-04-2003, 11:51 PM
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One cap goes to the "main chamber" so that, if you want, you can pour the whole thing in. The other goes to a small sub-chamber that's connected by a tube (you can see it on the left) to the main chamber. If you squeeze on the main chamber, you can get some of the stuff to go through into the sub-chamber. THe subchamber is marked, allowing you to measure it out.

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