Fuel Fluke

mopar head said
Hey mulli, what is this autometer sensor? I`d highly advise against a fuel filter on the suction side of the pump. I would try what 6pak suggested. I`ve heard alot of people doing this with good results, even without the parts cleaner part of it. If your tank is clean, and your using a factory sending unit,with clean sock, no filter on suction side, a factory pump, and unobstructed lines and vent, there should be no reason for fuel problems. keep us updated8)

The sensor came with the AutoMeter gauges.... in which was designed to slip down into to a racing fuel cell. The original Mopar sending unit does not put the proper ohms so I had to fab the AM sensor to the factory sending unit in which it reads correctly now.

I have always ran a filter coming out of the tank with no problems on another car I had but I will do away with it. I'm up for anything right now.

I really believe the tank has trash in it... I don't know why cause it looked clean when reinstalled.

With that being said I ran a hose straight off of the mechanical fuel pump into a gas can of fresh fuel... the pressure still dropped to 4.5!

1qwikScamp said
why do you have two fuel pumps

I have no idea. It was that way when I bought the car.

demon seed said
My turn Mulli, if you can't see or hear anything rattling around in the old tank it should be good. Make sure the sock on the end of the pickup is good and hook everything up running the fuel line along the frame rail then up into the mechanical pump (electric pump bypassed). Remove the rubber line that goes into the mech. pump and connect about 4 feet of clear plastic hose to it and bring the open end out to beside the front wheel. Then with the fuel tank 1/2 full of gas get a syphoning action going into a pan close to the floor. This practice will ensure the fuel line is clear and watch for bubbles in the plastic line, if there are any indicates a pinhole in the sender tubing or the rubber hoses you're using. Next another fuel pressure guage cuss we're going to make sure the original ain't lying to ya. Next plum in a pressure regulator as close to the carb as possible like the one linked and set for 6-6.5 psi. I've had Holleys float levels bounce around at pressures over 7 especially with a hot engine.

Terry

I took the line loose from the rear full filter and blew into the tank using my mouth. I heard debris shooting across the bottom of the tank. Then fuel started shooting out of the hose like crazy. I don't know if I dislodged the trash and it started flowing or by blowing in it I made a siphon. I had the gas cap popped open when I did this. But one thing is for sure is that I did hear something other than air in the tank. I swore I had that tank clean before reinstalling it. It was much cleaner than it was when I dropped the tank!

The sending unit has a new sock on it that bought when I dropped the tank. I replaced all the rubber hose connections when I installed the new aluminum line.

I'll try the plastic hose when I get the new tank in and plumbed up. I'm going to get a new sending unit with two outlets instead of one so I can run a return line later.... that would work wouldn't it?

1970BBDart said
I have had the same issue in the past, same problem, same solution:-D

What the return line specifically or something else he mentioned?