Stalling after 10 Minutes?
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Freshman User
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From: Colchester, Vermont
Stalling after 10 Minutes?
This is my first time posting. I have a 1978 F-100 stepside, 300 inline 6 automatic, good shape I bought it new. I have been having trouble keeping it running, but not all the time, It will run for about ten minutes then it will start running rough wanting to stall I have to put it in neutral and feather it and get it to a safe place in a hurry before it dies. When it dies I can hardly get it started sometimes I have to keep the gas pedel to the floor to start, I have to wait about ten minutes, and feather the gas to start. Most of the time its better but not all the time. Put a new stock sngl barrel carb. on last year,plugs, wires,fuel filter,dis. cap an tune -up. I also put a new gas tank on this year, replaced vacuume lines under the hood. Also this year I replaced the ignition module.If anyone can point me in the right direction it would be great. Is there any advantage to putting on a electric fuel pump? Whew .Thanks
Last edited by Dopa911; Apr 7, 2004 at 12:45 PM.
Post Fiend
Joined: Jun 2003
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From: NE Texas
Did you happen to leave a piece of plastic in the new fuel tank, allowing the plastic to get caught around the suction tube?
Have you got a clear fuel filter in-line so that you can see whether or not it's getting fuel?
Sounds like it's not.
Have you got a clear fuel filter in-line so that you can see whether or not it's getting fuel?
Sounds like it's not.
Postmaster
Joined: Apr 2000
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From: SD
Originally Posted by Dopa911
Put a new stock sngl barrel carb. on last year,plugs, wires,fuel filter,dis. cap an tune -up. I also put a new gas tank on this year, replaced vacuume lines under the hood. Also this year I replaced the ignition module.
Marty
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Joined: Dec 2003
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From: Memphis, TN USA
Have you replaced the ignition coil lately? What about the ignition module?
They might be good when cold but then starts acting up when warm. Letting the engine cool down probably gives time to cool down the ignition coil and ignition module components and let it work.
They might be good when cold but then starts acting up when warm. Letting the engine cool down probably gives time to cool down the ignition coil and ignition module components and let it work.
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Freshman User
Joined: Mar 2004
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From: Colchester, Vermont
Originally Posted by 73Custom
Did it quit like this before you replaced these things?
Marty
Marty
Slade901:
I replaced the coil about 3 years ago. I just replased the Ignition Module 2 days ago,and it still did it.
EDIT:
Here's a thought, would a muffler be bad on the inside but look good on the outside? and how could I tell if it was bad on the inside? Blockedge? But why only once in a while? Do's this sound dumb?
EDIT:
Is there any advantage to putting on a electric fuel pump? Thanks
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Postmaster
Joined: Feb 2003
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From: Spokane WA
is the electric choke working ?
It sounds like a choke stuck closed
"When it dies I can hardly get it started sometimes I have to keep the gas pedel to the floor to start"
doing this opens the choke a little bit.
It sounds like a choke stuck closed
"When it dies I can hardly get it started sometimes I have to keep the gas pedel to the floor to start"
doing this opens the choke a little bit.
Last edited by oldhalftons; Apr 7, 2004 at 08:10 PM.
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Postmaster
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After it stalls, open the air cleaner lid and look at the choke plate. If it is covering the primary bores then it's still closed. As the engine heats up it should open. If not then either the choke mechanism needs adjusting (turn a round black housing on the passenger side of the carb) or has failed.
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Freshman User
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From: Colchester, Vermont
Sorry I haven't posted. Life. I checked out the choke it looked like it was working fine. Thanks. I took my truck out for a ride and I got stuck, had to wait for about 10 or 15 min. till it warmed up some more. While I was waiting I happened to grab hold of the EGR valve and when I did it was loose ( the front part ) I could wiggle it and when I did the idle just got worse and almost died, pulled it off and the shaft looked bent. I had cleaned it last year, it thought it looked fine, but. Thinking of replaceing it ( EGR ). Any thoughts?
Last edited by Dopa911; Apr 13, 2004 at 05:28 AM.
Thread Starter
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Freshman User
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From: Colchester, Vermont
This has been a slow coming problem over the last year. It has got to the point where I can't get it idle smooth, even if I let it warm up long enough. Does this make sence? Thanks.
Post Fiend
Joined: Jun 2003
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From: NE Texas
Originally Posted by beartracks
I would look at the fuel pump/pressure. Weak pump or a clogged line could do it.
Also, I would install a see-thru fuel filter in-line and see what the fuel is doing. Install downstream, between the pump and the carb. The fuel pump could be bad.
As far as an electric fuel pump - they have their advantages, but the stock pump should be fine with your stock setup.
Additionally, the carburetor could be bad, even though it's new, since you have to hold it to the floor to get it started. With that in mind: Does it sound flooded when you crank it over? Does black smoke roll from the exhaust pipe(s)?
Did you replace the EGR?