fuel pump sucking air?

[72maverick]

So we put the block back together and tried to start it and the fuel pump was making a sound like it was working but it wasn't moving fuel. THe pump is this guy: http://www.classicinlines.com/proddetai ... EFP&cat=51

Also, the distributor is not firing. For the DSII i used this diagram:http://www.carbdford.com/tech/HEI/hei.htm

All I can think is that it isn't grounding well enough.

Any ideas?

Thanks

 

[rbohm]

8) regarding the pump, were have you mounted it? how low compared to the tank is it?

regarding the ignition, first make sure the wiring is correct. next look at the back of the module and make sure the pins on the back of the module are broken off flush so the module will sit flat on its mounting surface. second use the proper dielectric grease when mounting the module, and dont be afraid to slather it on, it helps keep the module cool. third make sure the back of the module and the mounting surface are clean before putting things back together. fourth, there are three wires coming out of the duraspark distributor, one of which is a ground. most people ignore the ground, but personally use it to ground the distributor to the chassis.

 

[72maverick]

The fuel pump is in the stock location. Tunes out, there was not spark with my old distributor as well (has pertronix in it). I broke the pins off, its flush and covered in heat transfer grease. I have the distributor ground back to the module like the diagram. I'm wondering it this is just a low voltage problem? I saw first hand the fuel pump was pumping this last friday. Should the ground be relocated? Or the module possibly bad?

 

[rbohm]

8) alright then lets go back to the basics, do you have voltage to the coil with the key on? if yes then check to see if you have voltage through the coil with the key on. again if yes then move the distributor ground to the chassis.

 

[bubba22349]

That fuel pump needs to be mounted near the tank it won't pull fuel from the stock location.

 

[72maverick]

I've ran that pump from there for a year and ran just fine. And I'll try to voltage check

 

[72maverick]

Does the module need to be grounded as well

 

[72maverick]

And the fuel pump should work either way independently of the distributor, right?

 

[bubba22349]

Yes if you have a ground and power to it then it should work. The module should be grounded through its heat sink. Do you have a volt / ohm meter or test light to check with?

 

[Gene Fiore]

I've ran that pump from there for a year and ran just fine.

Huh...all I have ever heard about electric fuel pumps is that they push the fuel but do not pull much. That is curious that you have been running it that way all along and have no problems. What kind of fuel pressure do you have? I have my electric pump mounted next to the fuel tank as low as possible to the fuel supply.

 

[72maverick]

enough to fountain out of the hose when it's straight up when I forgot to hook the fuel line to the carb one time.... and I mean fountain

 

[JackFish]

The system as you have it set up might just need priming.
Not sure how you would do that though. :
Might have allowed some air into the system when working on it.
Maybe fill up the tank and hope gravity will do the rest.

 

[72maverick]

I guess I can see that happening now. We pushed it up the ramps in reverse. If the fuel level was low enough, I guess that would allow air in the system.

 

[chad]

May B put the electrics to it (run it) untill it pumps fuel again. Fill the line manually & keep it in there (finger over the end?) B 4 reconnicting. If some 1 can put a hand on it to make sure it isn't over heating from running too long while doing this... if it IS lower than the tank U can fill the line, reattach & it'll pump air a bit till the fuel displaces the air.

 

[72maverick]

UPDATE:

SO the fuel pump was sucking air due to a bad hose. However, the coil is not sending a spark to the distributor at all. We fired the engine up once, after that no spark. Swapped distributors and redid all the wiring and simplified it and still no power from the coil.

 

[bubba22349]

Check that your battery voltage is at full charge.

 

[72maverick]

Thank you for the advice, but that was verified a few times through out the night

 

[bubba22349]

Have you tried a hot wire direct from the battery bypassing the ignition switch?

 

[72maverick]

Yes. Tried to do that. Sometimes had power to the coil, but not power from the coil. This was one two different coils and two different distributors

 

[bubba22349]

You might try another HEI module and or check your wiring connections again