oldnavy wrote:
The first sign of microbe activity is usually a slimy brown, black or green coating on the surface of the fuel filter element. Draining the fuel, replacing the filter and refilling the tank just gives the bugs more food and causes them to grow more. The only way to deal with the problem is to clean the system and treat it with a fuel biocide that kills the bugs.
This is caused basically two ways, (1) water contaminating the fuel or supplier not adding a biocide to his fuel or both(2) Not properly biociding bio-diesel durring storrage.
I always add a half oz of Power Service Bio Kleen to my regular ration of Power Service when traveling and about once a month when just driving locally. I use 12 oz plastic soda bottles to have premixed and measured to carry when travelling.
Had my old MB 240D do this once and after biociding it was all the dead critters (they turn black after they die) that had me carrying filters for a while. Luckly the MB had a easly replaced prefilter and hand primer.
Just so you know, I have seen this on several occasions over the years.
What's strange is, I've been doing the same, adding a half ounce of biocide along with every 8 oz dose of Power Service, since well before the first incident. I do it pretty much the same way, premixed, when I refill the 32 oz PS bottle I pour in 2 oz of biocide and then the rest with PS, and add 8 oz from the bottle on every tank.
Looks like I need to seriously dose the tank with biocide. I'm glad now that I added in the Perma Cool 2 micron prefilter, and ordered 3 more spare filters for it.
Good news is, after letting the fuel drained from the filter, and a sample pumped from the lines with the priming pump, sit for several hours there wasn't any visible dirt or water.
And the fuel lines appeared to be tight. Once I had the prefilter plumbed and ready to connect to the factory filter inlet, I was able to prime it by using a method normally associated with starting a Harley Davidson motorcycle.