Hard starting after 2 weeks off?
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Hard starting after 2 weeks off?
Trying to pin point why my darn truck is so hard to start after not driving it for 2 weeks or so. 400 2150 carb. It's just not getting fuel unless I crank it for 20+ seconds. It's as if the fuel has dried up in the lines and it takes that long to pump some up to the carb. Once it starts it perfect. Any ideas?
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Logistics Pro
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Is this normal? I can't imagine every truck when new couldn't go longer than 2 weeks without cranking it over forever.
Post Fiend
Joined: Apr 2008
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From: Big Sky Country
It's certainly nothing to be alarmed about, you can always install an inline electric pump to prime your carb if you're worried about excessive wear on the battery and/or starter.
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Logistics Pro
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Would the pump be in addition to the mechanical pump or in place of?
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Got it. I will check it out. thanks.
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Senior User
Joined: Apr 2011
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From: Milan, In.
I would check your accelerator pump diaphram on the front of your carb. Mine was doing this and had to pump the heck out of it. Once installed, I can just turn the key standing outside my truck and it fires right up.
Mine was leaking and allowing the fuel to drop back in the line and not hold good pressure. Best $8.00 I have spent at my local Napa. Just a thought!
Hope it helps,
Jim Lee
Mine was leaking and allowing the fuel to drop back in the line and not hold good pressure. Best $8.00 I have spent at my local Napa. Just a thought!
Hope it helps,
Jim Lee
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Logistics Pro
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I would check your accelerator pump diaphram on the front of your carb. Mine was doing this and had to pump the heck out of it. Once installed, I can just turn the key standing outside my truck and it fires right up.
Mine was leaking and allowing the fuel to drop back in the line and not hold good pressure. Best $8.00 I have spent at my local Napa. Just a thought!
Hope it helps,
Jim Lee
Mine was leaking and allowing the fuel to drop back in the line and not hold good pressure. Best $8.00 I have spent at my local Napa. Just a thought!
Hope it helps,
Jim Lee
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Logistics Pro
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Is it that the pumps let air leak in ever so slowly?
Posting Guru
Joined: Feb 2007
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From: Wingo, Ky
I suspect thats what happens. After my 73 sets about 3 weeks the fuel filter is bone dry. I have a cheapo fuel pump from Advance on my 79 F150 as well but it holds pressure alot longer(about a month).
MSEE
Joined: Apr 2004
Posts: 10,386
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From: Austin, TX
The accelerator pump isn't related to this issue because on a properly functioning system, you don't need to squirt fuel into the carburetor to start the engine. The point of pushing the pedal once before starting a cold engine is to close the choke. In very cold climates, pushing it a second time can help "wet" the throat of the carburetor, but much more than that will flood the engine out.
It's definitely normal to have to crank for some time after extended periods of time - however I think 20 seconds sounds a little much. 20 seconds of straight cranking is hard on the starter. Mine probably takes at most 10 seconds if I've had it parked for a week while out of town. I would be curious if there is some sort of very slow air leak that lets the fuel line lose it's siphon over time. How do the fuel hoses look? My '79 has three - one from the pump to the line, one from the line to the tank, and one in the center of the fuel line (which is actually 2 pieces). The latter two are often overlooked.
It's definitely normal to have to crank for some time after extended periods of time - however I think 20 seconds sounds a little much. 20 seconds of straight cranking is hard on the starter. Mine probably takes at most 10 seconds if I've had it parked for a week while out of town. I would be curious if there is some sort of very slow air leak that lets the fuel line lose it's siphon over time. How do the fuel hoses look? My '79 has three - one from the pump to the line, one from the line to the tank, and one in the center of the fuel line (which is actually 2 pieces). The latter two are often overlooked.
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