airdog issues

musclecars90 · #1 (**permalink**) 02-02-2013, 01:32 PM

Alright so i just installed my airdog 2 df-165 last week and a few things are strange.

The first thing is that my fuel pressure gauge is jumping like 3-5 psi at idle. I dont know if the pump has some type of bypass valve to where it will build pressure and relieve it and thats why it keeps jumping around? I dont know.

Second thing is holding pressure. When I installed the pump on saturday it was preset to 50 psi. On sunday I bumped it up to 60 psi. Well on wednesday I noticed it dropped down to 50 psi. So I adjusted the regulator up to 80 psi. And what do you know thursday it went down to 65-70 psi. And now today its back down to 50 psi. And I kept making sure the packing nut where the regulator is was tight.

Any help I would appreciate it.

**PGreenSVT** · #2 (**permalink**) 02-02-2013, 09:30 PM

You are fighting the factory FPR. You will quickly kill the DF-165 running it that high. Block off the Factory fuel return at the Factory FPR then turn the FP to 55 psi. Rewire the DF-165 with 10 gauge wire and it might live for you. Failure to rewire and lower the pressure and I can guarantee pump failure. The DF-165 sucks. I have been through 3 in 2 years. I have demoted mine to a 12 psi lift pump for a Fuelab high pressure pump. So basically it is acting as an AD150.

musclecars90 · #3 (**permalink**) 02-04-2013, 07:17 PM

Thanks for the reply.
Wouldn't blocking off the return line eventually blow out the o-rings on the injectors? And with the wiring. Do you mean replace every wire in the harness to a 10 gauge? or just certain ones

**PGreenSVT** · #4 (**permalink**) 02-04-2013, 10:51 PM

Just replace the power and ground from pump to relay and batttery. No need to worry about the trigger wires.

The DF-165 has it's own regulated return system so no it won't blow out o-rings on the injectors.

**Term3** · #5 (**permalink**) 02-05-2013, 04:28 AM

Plug and play 10g airdog2 harness

musclecars90 · #6 (**permalink**) 02-05-2013, 07:14 AM

Ok ill do the wiring. Now about the FPR could I take all the internals out ex. The blue spring and its components have a free flowing FPR?

jwsland · #7 (**permalink**) 02-05-2013, 09:37 AM

Quote:

Originally Posted by PGreenSVT

You are fighting the factory FPR. You will quickly kill the DF-165 running it that high. Block off the Factory fuel return at the Factory FPR then turn the FP to 55 psi. Rewire the DF-165 with 10 gauge wire and it might live for you. Failure to rewire and lower the pressure and I can guarantee pump failure. The DF-165 sucks. I have been through 3 in 2 years. I have demoted mine to a 12 psi lift pump for a Fuelab high pressure pump. So basically it is acting as an AD150.

4 in the last 8 months!

**Term3** · #8 (**permalink**) 02-05-2013, 10:04 AM

Quote:

Originally Posted by jwsland

4 in the last 8 months!

Curious if your using PureFlows wiring harness? I've been running my AD2 for close to 6 years now with zero issues. Although I've done a lot of work on the fuel lines and the wiring>