Car Problems. Need Help
Thread Starter
|
New User
Joined: May 2009
Posts: 17
Likes: 0
Car Problems. Need Help
Hi Folks,
I have a carburetor issue. It’s a 2100 and was rebuilt about a month ago. I’ve been dealing with this issue ever since then. I’m just getting time to work on it. Here are the symptoms.
1. Truck starts up fine in the morning. Electric choke good.
2. I drive the truck around for about a 1/2 hour. Turn the truck off and try to restart. No problem.
4. I Let it set for more then a ½ hr and it will not start without pumping the gas 4 to 5 times.
5. Lots of gas fumes, probably due to the excessive gas pumping.
6. No problems driving it around.
Thanks,
I have a carburetor issue. It’s a 2100 and was rebuilt about a month ago. I’ve been dealing with this issue ever since then. I’m just getting time to work on it. Here are the symptoms.
1. Truck starts up fine in the morning. Electric choke good.
2. I drive the truck around for about a 1/2 hour. Turn the truck off and try to restart. No problem.
4. I Let it set for more then a ½ hr and it will not start without pumping the gas 4 to 5 times.
5. Lots of gas fumes, probably due to the excessive gas pumping.
6. No problems driving it around.
Thanks,
Posting Guru
Joined: May 2010
Posts: 1,867
Likes: 3
From: Alton, MO
Sounds like the float has a hole in it. Fills and then when you shut it down it sinks enough to hold the needle open draining the bowl. If not that still sounds like the needle is open when it should be closed.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Next time you try step 4, instead of pumping the gas 4 to 5 times (which will flood out the carburetor and mask the issue you're trying to solve), gently hold the gas pedal down about 1/3 of the way, then crank the motor over with the pedal held there. If it fires, let off the gas. Does this procedure work instead?
Thread Starter
|
New User
Joined: May 2009
Posts: 17
Likes: 0
Thanks for the replies.
Had the float replaced at the time of rebuild. I verified the 7/16 setup yesterday. It was a little off. No change.
I tried step 4 with 1/3 pressing peddle. Started in 10 to 15 sec. A little long. My 78 starts in less then 3 sec.
Had the float replaced at the time of rebuild. I verified the 7/16 setup yesterday. It was a little off. No change.
I tried step 4 with 1/3 pressing peddle. Started in 10 to 15 sec. A little long. My 78 starts in less then 3 sec.
Posting Guru
Joined: May 2010
Posts: 1,867
Likes: 3
From: Alton, MO
Check to verify the throttle plate is closed when the truck is hot and off. When the truck is hot what is the idle RPM? Automatic or manual trans?
Trending Topics
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
It's possible that fuel is seeping past the threads of the power valve, or a hair-line crack in the fuel bowl is letting fuel seep into the intake manifold once it's warm. Since it started after the rebuild, the former is the more likely of the two.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Posting Guru
Joined: May 2010
Posts: 1,867
Likes: 3
From: Alton, MO
Hadn't thought about that. In any case it sounds like the bowl is running dry or at least very low.
Thread Starter
|
New User
Joined: May 2009
Posts: 17
Likes: 0
Elgemcdlf
I'll check the throttle plate when the truck is hot and off. I don't know how to check the RPMs and its an automatic.
fmc400
I did notice some fuel in the intake after removing the carb. Something is allowing the fuel to leak by. I read on how to check the float with carb on/gas. I've been checking the float with a dry chamber. I'm going to verify the power valvue.
I'll get back to you guys by end of week with results. Thanks again for the help.
I'll check the throttle plate when the truck is hot and off. I don't know how to check the RPMs and its an automatic.
fmc400
I did notice some fuel in the intake after removing the carb. Something is allowing the fuel to leak by. I read on how to check the float with carb on/gas. I've been checking the float with a dry chamber. I'm going to verify the power valvue.
I'll get back to you guys by end of week with results. Thanks again for the help.
Thread
Thread Starter
Forum
Replies
Last Post
Eddillard79
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
20
May 4, 2014 02:33 PM
pete315
Explorer, Sport Trac, Mountaineer & Aviator
3
Dec 31, 2009 06:54 PM
Creedog
1973 - 1979 F-100 & Larger F-Series Trucks
9
Nov 15, 2008 06:07 PM