Other Fuel Things
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Hotshot
Joined: Oct 2003
Posts: 17,799
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From: Ashland City, TN
Other Fuel Things
usually specs mean algae, but what other things can you get in the fuel bowl that are black floaties?
I drained it yesterday and had black specs like Algae, but the filter was clean as I when I put it in, which is amazing me.
So, what else could be in there?
I know I"m pouring fresh fuel in next time. I dont like cranking that long.
I drained it yesterday and had black specs like Algae, but the filter was clean as I when I put it in, which is amazing me.
So, what else could be in there?
I know I"m pouring fresh fuel in next time. I dont like cranking that long.
Postmaster
Joined: Sep 2007
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From: Medford Oregon
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Joined: Dec 2008
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From: Ocala
It is a regulated return system, when an o-ring in the fuel section lets go it circulates back through the fuel system
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Postmaster
Joined: Sep 2007
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From: Medford Oregon
Good thread. Maybe that is an indication the injector o-rings are starting to go .. can't hold pressure.
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Thread Starter
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Hotshot
Joined: Oct 2003
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From: Ashland City, TN
I might have caused this problem, honestly.
I uped my fuel pressure with the BB mod. So, the injectors are having a harder time.
I was down a qt of oil the other day, and now I havn't lost any again.
I figured I had some blow by.
I got lots of white smoke on start up, sometimes there is a bit of blue in it. So, I need to re ring my injectors. But that really makes me want to throw in Stage 1's. while I'm in there. Better go win the lottery first.
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Joined: Feb 2009
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From: Texas Coast
Thanks
Rocky-----
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The BB mod shouldn't cause it. One side of your o-ring is seeing 70 psi of fuel and the other is seeing 500-3000 psi of oil. That's why the orings end up in the fuel system. Oil getting past the seals erodes the o-rings and blows the chuncks into the fuel rail. If it gets bad enough, you will find your return lines full of oil. I did.
Aaron
Aaron
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From: Ft Scott
You have a two stage mechanical pump. The fuel is drawn from the tank by the 1st stage ( the diaphragm) and fed to the fuel bowl where it's filtered. From there it goes back to the 2nd stage (the piston) where the pressure is bumped up and it's fed to the injectors via the fuel rails in the head. Any unused fuel goes to the pressure regulator on the side of the fuel bowl and then returned to the tank. Once the cycle starts again it's pumped back to the bowl where any pieces of the o-rings are trapped by the filter and you see the black specs in the fuel.
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From: Ft Scott
The BB is used a a shim to increase pressure on the spring in the fuel pressure regulator. Old tired and weak pumps have trouble maintaining pressure and the BB brings it back up to assure that the injectors get their full shot of fuel in the alloted time.