Still Priming!
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Junior User
Joined: Apr 2004
Posts: 59
Likes: 0
From: Newport, North Carolina
Still Priming!
I have rebuilt the carb.replaced the fuel pump and line to carb but still haven't found why I have to prime with gas after sitting an hour or so. In case no one remembers my previous post, I'm refering to a 1981 f100, 300 six w/ YF carter 1 bbl carb. I guess my next move will be to remove the carb and observe the gas in the bowl while it is on the bench. I have a feeling it has some connection to the accelator pump. Anyone?
Mountain Pass
Joined: Oct 2004
Posts: 243
Likes: 2
From: Kremlin, Ok
got the same question too. got to prime it to start regardless of it being hot or cold. if I get it started, then shut it off and try to start it back up, got to prime it. New fuel pump, carb has just had a kit in it........anybody got any ideas?
Logistics Pro
Joined: Aug 2003
Posts: 4,701
Likes: 6
Is it wet under the carb? The bowls are supposed to have a full load of fuel, and then it starts with that fuel. It would seem to me that it is either leaking externally, or back thru the fuel line to the pump. Either way, I would look at a carb problem.
Senior User
Joined: Sep 2004
Posts: 196
Likes: 0
Check and make sure there isn't a vacuum being formed in the fuel tank by a defective or clogged Vapor Canister and associated lines/valves. Remember, if you've got the original gas cap it isn't vented, the tank is simi-sealed, the vapors accumulate in the charcoal of the cannister and are burned after start.
I've seen this before on carbed engines with V/C problems.
I've seen this before on carbed engines with V/C problems.
Thread Starter
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Junior User
Joined: Apr 2004
Posts: 59
Likes: 0
From: Newport, North Carolina
Not priming anymore!
I thought that I had posted my final findings but I guess I didn't. The problem was the fuel filter between the fuel pump and carb. It was quite large and as fuel drained back towards the tank it would empty the filter. When trying to start, it would take forever to refill the filter and return the flow to the carb. The gas in the bowl alone will not start the engine. I don't know the reason for this but i've read other posts of people who have verifyed this fact.
Thanks for all the help and suggestions. I didn't know the filter was a see thru one until I decided to clean it up. After cleaning it up I could see inside and saw what was happening!
Gene
Thanks for all the help and suggestions. I didn't know the filter was a see thru one until I decided to clean it up. After cleaning it up I could see inside and saw what was happening!
Gene
