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| | | | Joined: Nov 2012 Posts: 41 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2012 Posts: 41 | The fuel bleeds down when the engine is turned off. From the supply line i have a clear plastic filter before the fuel pump A glass fuel pump and a small glass filter up top by the carb. While the motor is running there is air in the fuel pump bowl and the filter up top is not full. The truck runs good down the road and ideling. When i shut it off the fuel bleeds out of the top filter and the filter before the fuel pump the glass dome on the fuel pump is not quite full. I have to crank the truck with the choke closed for a few seconds then push tit in and step on the gas. It is 6 volt so this takes a lot of juice. 216 51 chev 3100. why does it bleed back? Thanks | | | | | Joined: Feb 2004 Posts: 29,742 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,742 | You've got too many filters. One is enough. Every time you add a place for gasoline vapors (NOT air) to collect, you make the fuel pump work harder. Eliminate all the filters except maybe the one at the carb, and your problems will minimize. It's normal to have to choke a cold engine and crank it for a few seconds, especially if has not been run in a few days. A well-tuned engine should start within 5-10 seconds of cranking unless the gas lines are bone dry for some reason.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Nov 2012 Posts: 41 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2012 Posts: 41 | Thanks for the info Sir. I will eliminate the first filter. I put that inline there to catch anything in the tank before the fuel pump. I will let you know how that works.
| | | | | Joined: Nov 2002 Posts: 2,763 Carburetion specialist | | Carburetion specialist Joined: Nov 2002 Posts: 2,763 |
Good carburetion is fuelish hot airThe most expensive carburetor is the wrong one you attempt to modify. If you truly believe "one size fits all," try walking a mile in your spouse's shoes!The Carburetor Shop | | | | | Joined: Nov 2012 Posts: 41 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2012 Posts: 41 | ok i eliminated the bottom filter took it for a ride. Ran good. Got home and the top filter gas filter had level fuel in it. the fuel pump fuel was about 1/4 in below the screen on top of the pump. will check it in the morning. looking back at the problem the filter was a resiviour for air and the fuel pump had to pump air which is hard to do Thanks again! Hope that problem is fixed. Will let you know | | | | | Joined: Nov 2012 Posts: 41 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2012 Posts: 41 | Being a pipefitter I should know you cant pump air LOL Its holding now. Will let you know how it turns out. Going to bend new line that slopes toward the carb. Should bleed all the air out. Thanks again to all of you This site is awesome !!!!!! | | | | | Joined: Nov 2012 Posts: 41 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2012 Posts: 41 | Thanks to the forum and Jerry problem solved Joe | | |
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