not sure where to start............
05-07-2015, 01:01 PM
#1
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not sure where to start............
I've got an 2001 5.9 standard. Use to have problems wth stock fuel pump. Changed it out several times...Then big pump went out maybe 4 or 5 years ago. Got a new one ,,,,I think from Thorobred diesel. Installed myself. Also got a Raptor 100 lift about 2 years ago.. This is just a run around truck, no mods. Last month the Raptor went out and they sent me another and I put in... I've got a napa spin on before the pump.And pressure side goes to the stock filter. Also have a gauge. I set the pressure at (about) 20 psi at idle and it drops to (about) 15 at 2500rpm... Just started having trouble gain and not sure what it is. On the way home from work yesterday it started cutting out after it got warm....missed and died twice in about 50 miles..died again when i turned into drive...At first i thought lift was not working all the time... This morn i go out and it cranks right up no cutting out. I let it idle about 20 -30 min still smooth.I then pressed throttle and held at 2500rpms till temp started rising and it cut out again around 160 degrees. Tryed to start and failed. let set a bit and tryed to crank and started then died again....any ideas?
05-09-2015, 12:23 PM
#4
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The 1693 code is a companion code and you may need a good quality code reader to find what the other code is within the OBD system.
Also, having a filter before the fuel pump is not a good idea as it causes a restriction to the supply and even a clean filter will greatly affect the pumps ability to do its job. A plugged filter can shut down a fuel pumps ability to pump altogether as its having to suck through that restriction.
As for the Raptor, unfortunately Pureflow was a quality company years ago but they since sold out and became PureflowAirdog and have been providing everyone with some crappy pumps. You may be dealing with that dilemma and if so, its best just to get rid of that pump and move on to a FASS. Kinda sucks, I know but its better than a non-reliable fuel pump.
Lastly, the VP you got from Thoroughbred Diesel should be decent but it would be important to know if the PSG on there is the newest most up to date version. To know that, find out what code numbers are on the side of the PSG next to the bar code. Relay them and I'll tell you if thats the most current PSG. If its not then thats not a good thing and your PSG could be showing signs of issues.
Also, having a filter before the fuel pump is not a good idea as it causes a restriction to the supply and even a clean filter will greatly affect the pumps ability to do its job. A plugged filter can shut down a fuel pumps ability to pump altogether as its having to suck through that restriction.
As for the Raptor, unfortunately Pureflow was a quality company years ago but they since sold out and became PureflowAirdog and have been providing everyone with some crappy pumps. You may be dealing with that dilemma and if so, its best just to get rid of that pump and move on to a FASS. Kinda sucks, I know but its better than a non-reliable fuel pump.
Lastly, the VP you got from Thoroughbred Diesel should be decent but it would be important to know if the PSG on there is the newest most up to date version. To know that, find out what code numbers are on the side of the PSG next to the bar code. Relay them and I'll tell you if thats the most current PSG. If its not then thats not a good thing and your PSG could be showing signs of issues.
05-10-2015, 07:54 AM
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having a small inscreen filter before the lift pump is good.
I know fass recommends on their pumps. but this little filters are a inline
that is filtering only to about 120-160 micron if I remember. catches big chunks. the rest of whatever is in the fuel , a raptor, fass, airdog etc should handle. your factory filter and housing will filter to a 10 micron for oe filter.
you dont always need to go with the 600-700$ fass set ups.
I have been many years trouble free with my fass pump.
since I have a strong pump and wanted a little better filtering than a OEM rated 10 micron. I use a 3rd gen 5.9 fuel filter. it fits the same and is rated at 7 micron. I saw no pressure drop.
19-20 psi pending outside temps through the season. 15-16 at WOT.
I know fass recommends on their pumps. but this little filters are a inline
that is filtering only to about 120-160 micron if I remember. catches big chunks. the rest of whatever is in the fuel , a raptor, fass, airdog etc should handle. your factory filter and housing will filter to a 10 micron for oe filter.
you dont always need to go with the 600-700$ fass set ups.
I have been many years trouble free with my fass pump.
since I have a strong pump and wanted a little better filtering than a OEM rated 10 micron. I use a 3rd gen 5.9 fuel filter. it fits the same and is rated at 7 micron. I saw no pressure drop.
19-20 psi pending outside temps through the season. 15-16 at WOT.
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05-10-2015, 10:55 AM
#8
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05-11-2015, 11:55 AM
#10
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Well I'd have to do some more research on this because those are numbers I've never seen before on the PSG. 
Usually there are only three or four different code variations. I wonder where Thoroughbred gets their VP's from.
Point that I was getting at with the code number is just checking if thats a recycled PSG on your VP. If it is then it could be showing signs that the lead free solder is crystallizing from the heat cycles. And when the VP warms to engine temperatures, the electrical connections put together with that lead free solder become intermittent and cause things like hard starting when the engine is hot.
But that said, lets keep it simple and "cheaper" first..... So knowing that you're having a cutting out problem leads me to think that you're either having fuel pick up and/or delivery problems or the APPS is giving your trouble. Have you tried resetting the APPS? Easy to do.
Usually there are only three or four different code variations. I wonder where Thoroughbred gets their VP's from.
Point that I was getting at with the code number is just checking if thats a recycled PSG on your VP. If it is then it could be showing signs that the lead free solder is crystallizing from the heat cycles. And when the VP warms to engine temperatures, the electrical connections put together with that lead free solder become intermittent and cause things like hard starting when the engine is hot.
But that said, lets keep it simple and "cheaper" first..... So knowing that you're having a cutting out problem leads me to think that you're either having fuel pick up and/or delivery problems or the APPS is giving your trouble. Have you tried resetting the APPS? Easy to do.
05-11-2015, 06:23 PM
#12
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Parking brake? Resetting the APPS is just merely disconnecting the batteries from each other and the truck and turning the key to the ON position for at least half an hour to drain any residual electricity in the system. Then turn the key off, connect the batteries, turn the key back to ON and press the throttle down and up once at a moderate speed. Then turn the key back off and the APPS is reset.
Resetting the APPS is just merely disconnecting the batteries from each other and the truck and turning the key to the ON position for at least half an hour to drain any residual electricity in the system. Then turn the key off, connect the batteries, turn the key back to ON and press the throttle down and up once at a moderate speed. Then turn the key back off and the APPS is reset.
05-11-2015, 06:56 PM
#14
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Post what you find out. But do you have access to an voltage/ohm meter? If so then you can check the APPS to make sure its working correctly. Try Googling the APPS topic and you should find how to check it for proper resistance. And if you do ever think about replacing it, I understand the Timbo APPS is cheaper and better than any others. Timbo APPS