Possible AIRDOG2 issues need some help - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 05-24-2012, 11:55 PM Thread Starter
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Possible AIRDOG2 issues need some help

I have been running an airdog 2 for a year now and not had any issues till tonight and still not sure it is the pump. I was driving home tonight and noticed my fuel pressure gauge was jumping from 66psi where I have it set , to 56 psi. I was on the freeway going about 70 when I noticed the gauge went to 50psi and then completely went to 0 and no movement at all when I let off the pedal or not. I pulled over and shut off engine and ran my edge CTS to see if any DTC popped up and none did. I turned it back on and it turned over with no problems at all but gauge was still not moving. I drove home and still noticed no difference in performance. When I got in town at a stop light it felt like it was looking for fuel ONE time. When I parked at home I noticed my pump was not making the same hum or noise I am used to when it is pushing fuel.. If my AD2 is either going out or not working properly would my truck still drive, turn over with no problem or is the engine sucking fuel from tank and I may be starving my injectors?

RCD 4.5" lift with Airlift system, 4" MBRP turbo back minus KITTY & MUFFLER, AFE Stage II Pro Gaurd 7 intake, SCT X3 with Custom tunes, EDGE CTS for gagues with Pyro Probe, ARP studs, BPD Egr, Updated FORD oil cooler, Diesel Site Coolant Filter, AirDog II, 6.4 Banjo's, Upgraded BLUE fuel pressure spring, autometer in cab fuel pressure gaugs, Mag Hytec rear Diff cover, Full HID Xeon lights with HID Foggs, Recon LED tail and 3rd break lights all on 35X12.5R20's Toyo M/T's, XD Misfit rims.
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post #2 of 17 Old 05-25-2012, 06:10 AM
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Sounds like its on the way out. Of the AD and FASS pump failures I've seen almost all of them were permenantly fixed with a fuel sump.

Low profile fuel sump

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #3 of 17 Old 05-25-2012, 08:18 AM Thread Starter
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I have power to the pump and the fuses are good but when I feel the pump motor I feel or hear it moving... My truck turns over no problem and idles like normal.

RCD 4.5" lift with Airlift system, 4" MBRP turbo back minus KITTY & MUFFLER, AFE Stage II Pro Gaurd 7 intake, SCT X3 with Custom tunes, EDGE CTS for gagues with Pyro Probe, ARP studs, BPD Egr, Updated FORD oil cooler, Diesel Site Coolant Filter, AirDog II, 6.4 Banjo's, Upgraded BLUE fuel pressure spring, autometer in cab fuel pressure gaugs, Mag Hytec rear Diff cover, Full HID Xeon lights with HID Foggs, Recon LED tail and 3rd break lights all on 35X12.5R20's Toyo M/T's, XD Misfit rims.
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post #4 of 17 Old 05-25-2012, 08:44 AM
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Contact Pure Flow with your problem they have a good customer service.

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #5 of 17 Old 05-26-2012, 07:15 AM
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Do you still have the oem FPR in your fuel system? If so I highly recommend you disable it by blocking off the fuel return from the FPR. Also these systems are greatly aided by a sump rather than drawing from the top of the tank.

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post #6 of 17 Old 05-30-2012, 08:15 PM Thread Starter
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Quote:
Originally Posted by PGreenSVT View Post
Do you still have the oem FPR in your fuel system? If so I highly recommend you disable it by blocking off the fuel return from the FPR. Also these systems are greatly aided by a sump rather than drawing from the top of the tank.

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Found out that the pump motor was drawing to many amps some how and blew and in turn blew the relay but the harness is in good condition. Contacted Pure Flow and witout hesitation they are sending out a new pump motor and relay and all I paid was shipping. A whopping $35. Would NOT currentley having a fuel sump be a cause of this and by putting one in help with this problem reaurring or could this of been a simple motor issue? I am looking to have a sump put in while I am waiting for the AirDog parts to arrive next week.

I removed the fuel pump when I installed the airdog. To make sure I understand where the FPR is can you give a little more insight?

RCD 4.5" lift with Airlift system, 4" MBRP turbo back minus KITTY & MUFFLER, AFE Stage II Pro Gaurd 7 intake, SCT X3 with Custom tunes, EDGE CTS for gagues with Pyro Probe, ARP studs, BPD Egr, Updated FORD oil cooler, Diesel Site Coolant Filter, AirDog II, 6.4 Banjo's, Upgraded BLUE fuel pressure spring, autometer in cab fuel pressure gaugs, Mag Hytec rear Diff cover, Full HID Xeon lights with HID Foggs, Recon LED tail and 3rd break lights all on 35X12.5R20's Toyo M/T's, XD Misfit rims.
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post #7 of 17 Old 05-31-2012, 06:47 AM
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The OEM FPR is behind the "T" shaped metal block where the fuel lines connect to the engine mounted filter assembly. #27 Torx

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.
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post #8 of 17 Old 05-31-2012, 03:35 PM Thread Starter
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What benefits would I get from blocking off the OEM FPR?

RCD 4.5" lift with Airlift system, 4" MBRP turbo back minus KITTY & MUFFLER, AFE Stage II Pro Gaurd 7 intake, SCT X3 with Custom tunes, EDGE CTS for gagues with Pyro Probe, ARP studs, BPD Egr, Updated FORD oil cooler, Diesel Site Coolant Filter, AirDog II, 6.4 Banjo's, Upgraded BLUE fuel pressure spring, autometer in cab fuel pressure gaugs, Mag Hytec rear Diff cover, Full HID Xeon lights with HID Foggs, Recon LED tail and 3rd break lights all on 35X12.5R20's Toyo M/T's, XD Misfit rims.
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post #9 of 17 Old 05-31-2012, 05:04 PM
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The AD2 is self regulated so the really is no point having a second regulator (the OEM one) doing the same job. IMO not deleting the OEM regulator can reduce the reliability of the AD 2

SCT, no studs...yet, Dual OEM intake air filter housings, Banks intercooler & intake elbow, Banks exhaust system, Windrunner ported intake manifold, Bullet Proof Diesel remote oil cooler & thermostat, AirDog2 (plus a couple spares), Power steering filter (Amsoil dual-bypass), MagTec deep ATF pan, Electric oil pre-lub pump, Dakota Digital gauges.

Last edited by Term3; 06-01-2012 at 11:46 AM.
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post #10 of 17 Old 05-31-2012, 06:04 PM
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Yes, I believe eliminating the oem fpr will help the ADII reliability by not forcing it to run at higher pressure than necessary because of the extra FPR.

This is where you block the oem fpr by inserting a blocking disc.


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