fass pump help! diesel dan

[cj hall]

hello



I am running a fass pump on a 2004 dodge cummins that is running vegoil blend the pump will run 14 to 17 lbs running down the road the temp of the fuel is running from 75 degs and 120 degs I am on a road trip and what has got my mind working is that about 80 miles in to the trip the pump started losing pressure I have spa gauges that I can change the time that it reads the psi its set to take a reading every 1. 5 sec and display the reading it has an alarm on it if if goes lower tha 5 psi. the first time it did the low psi I was running at 80 mph and the engine was turing 1800 rpm it did it only for about 10 miles and then it started to build pressure then it ran ok for about 15 min



then started doing it again this time it was much worse it was running at a neg psi for 8 to 10 miles as low as -20 psi the gauge is hooked up 6 inches from the ip pump I have seen this gauge do this when the lift pump died on me before this is a different pump the one that went out was a stock one.

the engine started to surge like it was running out of fuel and I really thought it was going to die but it did not it started to build pressure and then came back to normal but if I tryed to go faster the psi would falloff and if I slowed down the psi would build.



we stoped for lunch and got back on the road the engine ran the rest of the day with no problems the pump is running any where from 15 psi to 10 psi and this is at the same speed and temp as before



the fuel tank is new and it is heated the fass pump is about 9 months old but was just in for a motor and had new wareplates installed this was from a lack of fuel from trying to suck the fuel thru a stock (dead) lift pump. the pump is heated also model is a 150/150-1005 I think dont have the paper work with me. the filters are newer they have about 2400 miles on them I change the filters at the same time I change engine oil at 3000 miles I do the because of the vegoil is a lot harder on the filters than diesel is. the fuel blend is filtered thru a 5 micron sock filter for 24 hrs or more so i dont think this is a fuel problem and with the heat the fuel is thiner than it would be if it was cold.



any help on this would be nice and any thoughts would also be helpful



thanks for your help



cj hall

-- email address removed --

 

[LowFly]

hello



I am running a fass pump on a 2004 dodge cummins that is running vegoil blend the pump will run 14 to 17 lbs running down the road the temp of the fuel is running from 75 degs and 120 degs I am on a road trip and what has got my mind working is that about 80 miles in to the trip the pump started losing pressure I have spa gauges that I can change the time that it reads the psi its set to take a reading every 1. 5 sec and display the reading it has an alarm on it if if goes lower tha 5 psi. the first time it did the low psi I was running at 80 mph and the engine was turing 1800 rpm it did it only for about 10 miles and then it started to build pressure then it ran ok for about 15 min



then started doing it again this time it was much worse it was running at a neg psi for 8 to 10 miles as low as -20 psi the gauge is hooked up 6 inches from the ip pump I have seen this gauge do this when the lift pump died on me before this is a different pump the one that went out was a stock one.

the engine started to surge like it was running out of fuel and I really thought it was going to die but it did not it started to build pressure and then came back to normal but if I tryed to go faster the psi would falloff and if I slowed down the psi would build.



we stoped for lunch and got back on the road the engine ran the rest of the day with no problems the pump is running any where from 15 psi to 10 psi and this is at the same speed and temp as before



the fuel tank is new and it is heated the fass pump is about 9 months old but was just in for a motor and had new wareplates installed this was from a lack of fuel from trying to suck the fuel thru a stock (dead) lift pump. the pump is heated also model is a 150/150-1005 I think dont have the paper work with me. the filters are newer they have about 2400 miles on them I change the filters at the same time I change engine oil at 3000 miles I do the because of the vegoil is a lot harder on the filters than diesel is. the fuel blend is filtered thru a 5 micron sock filter for 24 hrs or more so i dont think this is a fuel problem and with the heat the fuel is thiner than it would be if it was cold.



any help on this would be nice and any thoughts would also be helpful



thanks for your help



cj hall

-- email address removed --

MAN..... :-laf :-laf You Veggie oil people are wearing me out with pressure questions!!! haha:-laf :-laf ..... No biggy... . here are some suggestions that i have seen when troubleshooting a pump running WVO.



First off, never rule out a filter. That is the first thing everyone tells me is "The filter is new and cant be clogged". OR "I prefilter all my fuel and it is clean. " Last 3 guys said that and turns out it was indeed a filter causing the issue. The stock one on the truck was the last issues i dealt with.



2nd, how do you have your setup plumbed? Do you have a filter on the suction line of the pump? If you do, it needs to be about 140um. No less. If you put a 10um or even a 2um on the suction line..... just a slight amt of filter stoppage will cause issues. Our pumps (Well any pump) are designed to push through filters, not suck through them. This is another common mistake people make with WVO conversions.



3rd, the 150/150 is not the best pump for WVO. The thicker fuel might strain the motor more with the bigger gear trying to move the fuel through the system. I always recommend the 95 GPH or our RP-1004-HPFP pump. Its the 95 GPH gear mated to a larger/higher torque motor that will pump gravel if you wanted!:-laf Its a strong pump! You are pushing fuel through our pump at 75* to 120*. This is still rather cool by WVO standards. I though the fuel needed to be about 160* before it would even resemble the viscosity of diesel??? This might be some of your issue here.



4th, you might want to get the pump pressure up. The thicker fuel will pull the pump pressure down about 3-4 PSI with the small . 335 (95 GPH) gear. You are moving twice the fuel with the . 625 gear... so twice the load... so you might want to consider bumping the pressure to 25 PSI since you have a CP3. BUT here is the issue with that... . if you push the pressure higher, you are going to load the motor more than it is, and i would bet you are dancing on a razor blade (as far as amperage goes) as it is. You don't have much before you put that motor into the red I would bet. I would not want to see that motor drawing more than 10 amps... ... ...



Check those things out and see if that helps…. .

 

[cj hall]

fuel pump

Thanks Diesel Dan

Will check out the amps when I get home the truck is running fine today will be putting on a new filters before we get back on the road thanks for the advice on the pump I will be doing my wifes truck so I will be getting the 95 gph pump.



if I read this right the pumps you have pull fuel from the tank and then push the fuel thru the filters then on to the ip pump and I should have a pre filter on the suction side of the pump.



the veg oil is a lot thicker than diesel and at 160 degs is about the same I just think the cp3 pump wont take that kind of heat . I will start looking in to that next also the blend I use is not as thick as just svo mine has 10% K1 and 5% rug so its a lot thinner when its cold but its thick compared to D2



thanks for the help. all info is helpful at this point, thanks again



cj hall

 

[LowFly]

Thanks Diesel Dan

Will check out the amps when I get home the truck is running fine today will be putting on a new filters before we get back on the road thanks for the advice on the pump I will be doing my wifes truck so I will be getting the 95 gph pump.



if I read this right the pumps you have pull fuel from the tank and then push the fuel thru the filters then on to the ip pump and I should have a pre filter on the suction side of the pump.



the veg oil is a lot thicker than diesel and at 160 degs is about the same I just think the cp3 pump wont take that kind of heat . I will start looking in to that next also the blend I use is not as thick as just svo mine has 10% K1 and 5% rug so its a lot thinner when its cold but its thick compared to D2



thanks for the help. all info is helpful at this point, thanks again



cj hall

Might check this forum out..... www.frybrid.com

 

[JCyrbok]

did you have any other symptoms of low psi. I would think that is u were running -20 truck would have died. Check out the gauage. I had all kinds of problems with my SPA Boost/EGT gauage until I cut and soildered all the connections. I would get odd negative boost reading running down the road out of the blue. No problems since. These are nice high quality gauges but they were made for race cars and rice burners not diesels, which are very harsh. Just a thought



J-

 

[cj hall]

fuel psi

hello



i thought of that also the engine sounded like it was going to stop zero power you could feel the sruge in the truck could not pass or even keep up with the car in front of me once it started building psi it ran fine it did not run like a pluged filter when it does that it smokes really bad and it gets really loud like theres air in the lines i am sure the gauge was wrong but i am sure it was low pressure that was causing this the pump and engine are running fine now so one would think its a filter issue but not a pluged filter issue so thats want i will be looking at first.

if i was to heat the oil to 160 degs then i could pass about anything thru the filters at 100 degs i can do the same if the temp at the time iam making fuel is cool out say 40 to 55 degs its hard to get the raw oil to flow thru the bag filters but heat the same oil to 80 degs and it will flow like water.



this one is going to bug me for some time it looks like



cj hall

 

[cj hall]

fuel pump

Hello All

The fuel pump is working just great I did not change the filters or anything when I was on the trip, not sure what the problem was but its not doing it right now. thinks maybe some thing it the tank from the mod getting the heater in it.



Diesel Dan you said the better fuel pump would be a 95 gmp fass pump I am starting to put the part together for my wifes truck and would like to make sure I get the right pump her truck is a 2005 2500 short box 4x4 quad cab.

i am thinking that the pump would be either the 95/95-1007 or 150/95-1007

is this right I would want the pump on my truck and this new pump to be able to use the same fillters.



thanks for your time



cj hall

 

[LowFly]

Hello All

The fuel pump is working just great I did not change the filters or anything when I was on the trip, not sure what the problem was but its not doing it right now. thinks maybe some thing it the tank from the mod getting the heater in it.



Diesel Dan you said the better fuel pump would be a 95 gmp fass pump I am starting to put the part together for my wifes truck and would like to make sure I get the right pump her truck is a 2005 2500 short box 4x4 quad cab.

i am thinking that the pump would be either the 95/95-1007 or 150/95-1007

is this right I would want the pump on my truck and this new pump to be able to use the same fillters.



thanks for your time



cj hall

150/95-1007..... ill write more later... . lil busy right now... .

 

[cj hall]

95/95

Hi Dan,

Could you please tell me what size the threads are on the 95/95 pump and is there a cross reference filter number you can give me for a substitute filter. I can find the water separators but can't find the main filter. Please call me at 406-672-6853.

Thanks,



CJ Hall

 

[LowFly]

Hi Dan,

Could you please tell me what size the threads are on the 95/95 pump and is there a cross reference filter number you can give me for a substitute filter. I can find the water separators but can't find the main filter. Please call me at 406-672-6853.

Thanks,



CJ Hall

Sorry about the long pause between posts!



As you stated, the 95 Series water sep can be found and crossed:



FS-19768



The Fuel filter can not be crossed. Its proprietary, made for us by FG. BUT we have more and more FASS dealers stepping up and stocking these filters for this reason.



The inlet and outlet threads on the FASS 95 series are 3/8's NPT.

 

[cj hall]

filters

Hello Dan

Thank you for the info.

On the fuel filter is the thread 13/16 -16 tpi





Thanks

cj hall

 

[LowFly]

Hello Dan

Thank you for the info.

On the fuel filter is the thread 13/16 -16 tpi





Thanks

cj hall

Im sorry! I misunderstood your question. I though you wanted to know the thread size of the inlet and outlet on the unit itself.

 

[cj hall]

thread

hello dan



thats ok its hard sometimes doing this over the internet



thanks for your time



cj hall