1 word.

mechanical.

i work in a high performance engine shop and thats what they recomend for the street cars.

 

The pic gave a weird duplicate image that makes it look like the hose is on the bottom of the tank but it goes out of the sending unit and wraps around behind the pump (level with the bottom) and comes in a 90 degree fitting that is screwed into the front (so the fitting points toward the right side of the car and the hose makes a gradual 3"-4" radius to go into the fitting - hose does not look to be kinked at all). Here is a better pic of when I had the Holley going, the Edelbrock bolts into the same holes as the Holley.

[IMG]local://upfiles/34309/D2C9F76FDF8F41F4B75173C145C9AA20.jpg[/IMG]

 

where is the relay located?

i would keep the wiring as short as possible from the power source to the relay and from the relay to earth and pump to earth. there's no need to take the pump all the way back to the engine bayto earth or to use the same earth point as the relay. One of your bracket bolts would do fine.

it doesnt look like it from the pic, but there's no fuel filter between the tank and pump is there?

Also...testing my fading memory...if your fuel system is well sealed. Jeez been a long time but in the absence of a return line, sometimes you need a breather to allow the pump to operate or you can be creating vacuum in the tank that then over works the pump.

You have a fuel pressure gauge but is there a regulator? Is the pump possibly over pressuring (over working) and getting hot?

 

Thanks Aussie, I do not have a fuel filter between the pump and the tank (just the screen inside the tank on the sending unit). Also, I wired it directly as they suggested in the instructions so that I wouldn't have problems - they say to take it to the negative terminal on the battery or the engine block (seems like overkill to me but after my first episode I decided to follow the instructions regardless.....)

I had the wires pulledapart a little while agoand decided to check the pump again and voila, the pump works. I am not sure if I had the wires too close together using spade connectors and it was arcing across -I had wrapped the spade connectors with a few wraps of electrical tape and maybe it wasn't sufficient tokeep thepower and ground fromeach other???? I put wrapped a rubber piece around the ground wire and put the two in the wrap and it seems to work fine. The pump has a consistent sound and doesn't seem taxed.

I wonder if you have hit on something with the vaccuum seal - my gas cap goes on very tight and I am wondering if I am having an issue with getting air to replace the fuel from the tank. Yesterday, I ran the car for about 5 minutes on a very hot day and then the pump stopped. When I had the Holley on there before it ran great for about 10 minutes before the fuel pump started making shrill noises and I lost fuel pressure with the pump dying.

Aussie, I think you have hit on something here. Any ideas for a breather?????

Since my Holley came with a regulator, I left it on so maybe this is an issue (going to call Edelbrock tomorrow to make sure) - I also have my fuel pressure gauge in the other side of the regulator so I left it in.

 

Aussie, nice call mate!!!!!!!

I looked at the manual but should have read the notes a bit better - breather hose on a 66 mustang is through the gas cap. Since I was using a late model mustang gas cap, there was no venting mechanism and I was getting a vacuum lock on the tank. When I turn the key, I now get 6 psi and I let the car run for a good 2 minutesand everything seems to be working fine - no overheating, etc.

The pump does make some louder noises sometimes though - I wonder if the pre-bent lines have a few sharp turns which cause the pump to load down? Also, the Wagner gauge is showing around 3-4 psi when the car is running, would this be a normal operating range for 302 with the Barry Grant road demon (manual says the mechanical pump provides 4-6 psi but I was wondering if the electrical pump should show the 6 psi when it is running - like it is with just the key on)?

Thanks again, so glad to be past this one!

 

Aussie, forgot to answer your question on location - I put it behind the glove box as the Edlebrock guy recommended (he also said it could go up by the battery and didn't seem to concerned about the length - which seemed a bit odd since everyone else I have spoken with suggested the biggest wire and shortest length)