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Originally Posted by barry123400
To technically make the test conclusive. Run your fifty fifty mix in the external fuel supply set up as well. Duplicate the same set up as close to possible you had with the diesel fuel.
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I did this originally from the bottle that's how I determined it would run on svo. First I tried just straight veggie oil to see if it would start because I had straight diesel in the tank originally. It ran so I added 50% diesel to the bottle and it still ran. Then I added removed the diesel from the tank and added my 50/50 mix to the tank and drove until it got hot and then stalled and would not start.
Quote:
Originally Posted by barry123400
Also I hope you where not running the remote supply through the fuel filter. That filter would be too restrictive for a gravity set up I suspect. From your set up right to the input of the injection pump is required. One has to be very careful not to ruin the validity of any test when avoiding instrumentation.
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I did run it from the bottle through the primary filter the same as it comes from the tank. It seems to me that the tank or the bottle the fuel pump is still pumping from fuel that is not under pressure. Since it works so well on the 50/50 mix from the tank I'm assuming that the lines are not clogged. I know the line from the bottle is clean. It should be the same flow from the bottle or the tank. Right?
Quote:
Originally Posted by barry123400
If for example I experienced a simular problem my first move would be to measure the feed pressure in the base of the pump with both types of fuel. If feed pressure remained about the same I would consider it pretty conclusive.
Thats if large amounts of air were not being expelled out the return line sitting with the end of the hose under fluid in a small vessel. With either fuel. You have to first make sure the lift pump does develop enough pressure to open the relief valve first.The risk if attempted without a gauge is you do not know the pressure the relief valve is opening at.
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I'll try this after the primary filter from both sources and see what I get.
The return line was not submerged in the bottle so I could see the fuel being returned. When using the hand pump you can hear the relief valve opening and see the fuel going into the bottle. Since I don't have anyone to help me here I could never see the engine running and returning fuel because it wouldn't run long enough for me to get out of the car to see.
Quote:
Originally Posted by barry123400
Tomorrow I purchase an otherwise good car that quits at any random speed after about an hour on the road. Usually starts right up again and will run for about another hour and repeat.
The owner is at his wits end with trying and paying many times to get the issue resolved. The selling price reflects this.
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Sounds like a real challenge you are about to get into. It may even be the same problem I have with the IP getting hot and failing.
It must be rather chilly up there in Nova Scotia. I've got some family roots up that way.