FlatTwin

Just installed an AD2-165 and had the opposite issue. Standard was 25 psi and thats too high for me. Contacted Pure Flow and they said to clip one coil off of the spring and get the pressure down around 18. Did so and its now 18-19 psi and WOT of 17 psi, never lower. You want your pressure above 14 at all times to keep the fuel bypassing the VP-44, so either get a new spring or put a couple of washers under the existing spring to get the pressure up. 10 is far too low...

Agreed but this unit has been checked and is accurate. Just cut the spring down and its now showing 19 psi, so at least now I have some room for adjustment. - - - Updated - - - Update, the pump is now sitting at 19 psi at idle and 90% of the time I am driving, at any speed or throttle position. WOT the pump sometimes goes down to 17 psi, but usually stays at 18 psi, so should not have any fuel pressure issues in the future!

Am using an Edge w/Attitude for the pressures. It was checked once a long time ago with a gauge and was spot on then, so doubt that anything has changed in its readings. Also the entire unit was sent back to Edge for upgrades about 2 years ago so assuming that they did their internal checks on the unit at that time.

Just saw someone do it last week by cutting a hole in the bed of the truck. Not pretty but they did a very nice job making a square hole and re-attaching it back once they were finished. In the very same situation as the gent above with no place or way to work on the truck. Next time I do this may do the same thing myself. It was a bear to get the bed up high enough to get the tank sensor out. Not every person has the way or means to do this and pulling the tank is a real bear of a job. The engineer who designed this needs to be farmed out around the country doing only fuel tank sensor removals/repairs.

No idea which one it was. My original Raptor 100 was about 4 years old and lasted just over a year before dying. Replacement worked fine but after a while leaked. Replacement for that one again lasted over a year and just started dying last month. Did not die all together but anything over 20 miles and it started losing pressure. If yours does this, stop for 3-5 minutes then get going again. If its like mine it will give you another 20 miles so you can limp home or to service. With these symptoms I would guess that its getting hot and starting to sieze but thats just a guess. You and I have the same issues... I just cannot get stuck out on a trip.

Cant wait to see how this goes. Am holding my breath as I have a 6 speed and hoping (and praying) that it stays together!

PureFlow advised me to dial the pressure down to 18. Tried to adjust the puppy and it would not go below 24 psi while driving (22 WOT) after that.Contacting PF to see if they have a different spring that will allow lower pressure today.

We had talked about doing that but after the 3rd Raptor failed, PureFlow made me a deal I could not refuse and upgraded to the AirDog-165. Really glad I did as this now has the dual filters and a lot better pump. BTW, I contacted PF about the wiring harness and they told me that the harness is the same in these two cases. Said its easier (and cheaper) to build the same harness for both the Raptor and AirDog and stock only one as opposed to having separate harnesses.

If not go directly to PureFlow. I just dealt with them on a warranty replacement AD-165 for a failed Raptor 100 and they bent over backwards to help.

As I said in the original post, its identical as far as I can see... exact same relay, fuse and so on...

Anthony, Thanks and lets hope that they are learning with experience. The pump that they sent me is just a bit different from the one in the photos on the web, so hoping that they are tweaking it as they get more of them out in the field and that reliability keeps getting better. Dave, Sure hope so as well! Thx, FT

Thanks and that was my thought as well.Hope this one is better as its a new HD version of the older AD's. Will find out... Thx, FT

Well an update to my situation. My old Raptor 100 worked fine up until the end... but thats as long as I did not drive over 20 miles at a time. Anything over that and the pump overheated and the pressure started falling. I let it drop to 11-12 psi then stopped by the side of the road for 3-4 minutes to cool down, and it was fine for another 20 miles.After losing three Raptor 100's, PureFlow just made me a deal on a AirDog ll-165, the model they sell for the semi-trucks. Just got it on the truck late this afternoon and boy does this puppy put out the pressure. Its immediately up to 25 psi at idle, not taking 1-2 seconds to pressure the system like the old Raptor 100 did. Have not driven it other than up and down the street but boy it sure does seem like its a lot better, plus it has those two filters on it which have to help.

Dave,Totally agree and I do work with electrics on airplanes. That said, the run is not that long, like 8 foot AND its running directly from the battery to a relay that is powered from the computer, so the majority of the power comes in a heavy wire from the battery controlled by the relay.Just went out and finished up the installation (had to plumb in the vapor line to the tank, the Raptor did not have one of those) and OMG this puppy puts out loads of pressure and did not even let me get things bled and so on, it started on the second click of the starter... was just trying to purge any air out of the lines but it started on all 6 immediately and never faltered like it usually does with air. Will call PureFlow on Monday and see what they say but at least its running and moveable! Thx, FT

Well guys,PureFlow sent me a upgraded replacement for my third failed Raptor 100, and before someone asks yes I did have to pay some extra. For me its worth it as hopefully now I have a reliable truck. The last two raptors died on the road and I had to limp the truck home, and one time it cost me a VP-44. Now I have a newly overhauled VP which runs better than any that I have had before and want to keep it that way. That said, just got the AD ll in and running and cannot believe the difference! The old raptor-100 did fine and held a good 21 psi or so but it did not respond like this one does. That said, PF told me that the pump that I have on the truck now is the same one that they use on semi-trucks and industrial power units, so should handle the Cummins in the Dodge just fine. As well I like having the filters... This AD ll gets pressure up immediately (the raptor took a second or so) and is set from the factory at 25 psi at idle. Have driven it up and down the street but nothing else so no idea what WOT pressures are just yet. Just could not believe how fast this puppy puts out pressure!A question for the group. At this time the VP-44 seems to run fine with 25 psi but isnt that a bit high on pressure? Should I back things down to 20 or so or what do you guys think I should be running? Thx,FT

Dave, Same thing I was thinking! Michael, That was the only thing I was wondering about. Am going to leave the existing harness in for now and call PF on Monday and ask about the wiring size. If the new one is bigger then will change it out, but for now at least this allows me to get the truck out of the driveway so I can get the car back in the garage! Thanks! FT

Recently lost my 3rd Raptor 100.Pure Flow was very workable and sent me the upgraded version of the AirDog 150 (an industrial version of it) and so far everything is hooking up nicely. Did have to run a "vapor return" line to the fuel tank but that was not difficult.Now I was getting ready to do the electricals and come to find that the wiring harness from the AD 150 appears identical to the Raptor 100 version.Anyone done this upgrade and seen the same thing? The relay is the same, fuse the same and hookups, as far as I can see, are the same. Cannot see any reason to un-do everything from the old installation and string new wire, relay and so on unless its something different or better.Thx,FT

Thanks and just what I am planning on doing. They already sent me a kit, its a warranty situation as my Raptor 100 died for the 3rd time so I worked a deal with them to get away from the Raptor series. Thx,FT

Thanks and I have the Raptor 100 on the truck right now, with a Drawstraw and Vulcan big line kit, so was hoping to just remove the old defective Raptor, mount the AD in the same place, attach the same fuel line fittings to the flare fittings that came from PureFlow in the first place (which I hope are the same size, they look like they are) then fuss with the return fuel line and electrical stuff. Thx, FT

JR,Thanks. You bring up an interesting question. Assuming that you switched from a Raptor to a AirDog system with the dual filters? What was the conversion like? Any hassles? Looks like I am going to be doing the same thing and from the paperwork appears that the only big change is the vapor return line going back to the tank. Also did you bypass the stock fuel filter? Am not real excited about doing that as I have already spent the $$ to put the "Big Line" kit on the truck from Vulcan and do not want to go down to smaller hose supplied by PF. Thanks,FT

JR, Did they make you return the old pump? They want me to send my old one back in, so am assuming that its going to be overhauled and given out to someone else when theirs dies. They did make me a very good deal. Not sure that I can comment on it just yet but once I get the ok will let everyone know. My days with the Raptor 100 are just about over, and now I get to figure out how to mount something new and much larger to the frame rails! FT

A slight update to this thread. Yesterday afternoon received a call from a gent at Pure Flow. Seems that after my repeated issues with the Raptor 100 that they were handling my situation as a special case and wondered if they could get back to me the next day when they had some options for me. Totally agreed and told the gent that my issue was the unreliablilty of the pump and that I was not in any way looking for performance or the like out of the truck. He said that I would be contacted sometime today to hopefully take care of the issue. Course its now 5 minutes after 1700 here (5 pm to you non 24 hour folks! ) and no call so far but thats life. As long as they are working with me can hang on a bit longer. If they indeed do something like this then will sing the praises of PF for years to come. Good customer service is something that you do not see often these days.Lets hope that they call tomorrow with some good news! FT

My 2002 had that as well but it plugged into the back of the mirror to work with the "auto darkening" feature on the mirror. Did not see any other wires in that area. As well a month on the mirror is still good and tight on the glass! FT

Good point Mike. You know that if they put a 15 amp fuse in the circuit, that its going to be drawing less than that. I may just try to put a circuit breaker in my system (so I could reset it if needed) but have to find the conversion chart for "CB's versus fuses" then go looking in the shop! Thx, FT - - - Updated - - - Will, Mine has been mounted on the frame rails since new and agree. All of my Raptor 100's have had the inlet screen on them and never found any debris in the screen when I removed them but a filter might be a good call. On the other hand, my first pump lasted a good 18 months before dying, and the others since then have died at about the 15 month time frame. If yours starts to lose pressure, even a few psi, then keep an eagle eye on it. If it goes below 15 then its dying. Stopping by the side of the road will get you about 20 miles more, so you can get home this way. FT

Hmm, not sure what you are working with but I do electrical work on aircraft and we have never heard anything about combining the wire length. With a wire run of say 6 foot, a 15 amp continuous load on a 12 volt system and the wire in "open air" (not in a wire bundle), the FAA says that a 16 gauge wire would be fine. Just to be save am going to use 14 gauge wiring on my relay setup to make sure that the pump has no volts or amp's issues. http://www.everyspec.com/FAA/FAA-AC-PUBS/AC_43x13-1B_Change-1_14158/ The chart is "11-2, Conductor chart continuous flow" FT