Ok. Here it goes. I have a fully built fuel system. Itp 5/8" pickup tube to 5/8 push loc to fleetgaurd water separator fs 1212. 5/8 to the pump. 1/2 from the pump to the post pump fuel filter. fleetguard ff 5320. 1/2" puhs loc to a y, and the 3/8 p.l. feeding the front of each head. I then have 3/8 p.l. returning from the rear of the heads to an aeromotive regulator set at 63 psi
. then 3/8" p.l. returning to the tank. The return is clamped on the original pickup tube, and the return is directed away from the 5/8" pick up intank. The original return at the tank is not being used and I plugged it so no fuel splashes out. I have the pump wired according to spec I think. I am using the factory wiring to trigger the ignition to the pump. It is connected to a relay. I am running 10 gauge wiring from the positive terminal of the driver side battery. Directly going to a 30A inline fuse, and then to the relay. I then have 10 gauge wiring going to the pump. My ground wire is 10 gauge wiring going from the pump directly to the frame. I am not using a check valve. But it was reccommended recently from fuelab when I talked to them on the phone. Honest input on the way I have this system built would be appreciated as I felt I didn't cut any corners. If I missed something, let me know.
I have the pump with the studs on it. so i guess that is the new one... About 50% of the time when I turn my ingnition on, the pump will not spin up smooth like it normally does. It will spin, but it will have a lot deeper, louder tone to it. I can almost feel it through the truck. It will also show a couple psi
less on my gauge. If I start my truck up when it is doing this, it will blow the inline fuse in a minute or so. As a result, I typically turn my key back off when it makes this type sound. I wait about 10 sec and then turn my ignition on again. Many times it will do it again. Sometimes up to 5-6 times in a row before it spins up properly. Which brings me to another problem that arises less often when I turn the ignition on, but has been getting worse as it gets colder. It will not spin up at all but the fuel pressure gauge will jump around from 5-25 psi
. I will then turn the ignition off wait about a minute and try again. Sometimes it works right away, sometimes I have to cycle it a couple times for it to spin up properly. This makes me think the pump is cavitating but I have not been able to find where I would be able to suck air. Every thing looks t##s. This has got me thinking about the pre pump filter, but I don't think it is the problem. On to the the next problem. I cannot turn my stereo on because I can hear the pump running through my speakers. PITA with out music on a long ride. Also when I plug my cb into my cig lighter, all I hear is the pump running through the cb. Another PITA. Can't use the cb on long trips. This makes me think of a grounding issue. IDK?
Things I have done so far...I have run my stock pump in its location to see how that worked. Worked great other than holding fuel pressure at wot
It was quiet, no start up issues at all, and there is no noise coming through my speakers or cb. I have cleaned and checked my ground connection from the pump. It goes from the pump to the frame. It is about a 10 inch piece of 10 gauge wire. I have also replaced my relay with a new relay to eliminate that. No difference. I also lowered my fuel pressure at the regulator from 68 down to 63 psi
. No change in pump operation.
I appreciate your guys help. This is something that has plagued me for a few months now since I got the pump.