The Ford Barn

Texxracer22 · 04-09-2013, 11:44 AM

I just finished a complete restore of my 29 Model A Truck. Had the carbs done by a guy who really knew his stuff. It will start, idol and sounds great until i get about 5 minutes of running then is starts to bog down and back fire. I will be trying all the basics but any ideas where to start?

KMeredith87 · 04-09-2013, 11:52 AM

Out of curiosity as it sat for any period of time with fuel in the tank? Beautiful truck by the way.

Patrick L. · 04-09-2013, 11:58 AM

Had the carbs done by a guy who really knew his stuff. end quote.

Just what does that mean ? A little info would be nice.

Wife Unhappy · 04-09-2013, 11:59 AM

Loosen Gas cap and go for another ride.

ford3 · 04-09-2013, 12:13 PM

it may not be the carb, maybe points, coil or condensor, those problems sound like electrical, either one of them getting hot and breaking down

700rpm · 04-09-2013, 12:22 PM

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How many carbs have you got on it?

gweilbaker · 04-09-2013, 12:25 PM

If you have more than the common updraft carb you maybe starving for gas. Maybe a need for a fuel pump if you're running any kind of downdraft carb.

Duffy1 · 04-09-2013, 01:49 PM

Ditto post #4 ; Could be the Gas Cap not venting . Mine did the same thing .

kelley's restoration · 04-09-2013, 02:06 PM

i was told once by a friend who worked on a lot of cars of different types "if you think its carb its probably ignition"
so if the gas cap trick doesnt work (i has for me in the past) then check your condensor
tk

robw · 04-09-2013, 02:08 PM

Make sure you have a good fuel flow. Disconnect from the carb and let it flow into a Jar for a few minutes. You could have trash blocking the on/off valve, or trash in the sediment bowl.

Tom Wesenberg · 04-09-2013, 04:43 PM

What carb (s) are you running?

The original carbs have a brass scren in the top half and it sometimes stays stuck in place when the large nut is removed.

Hicktick · 04-09-2013, 05:07 PM

Could a critter have nested in your muffler ?????

Join a local club and get some help .There should be plenty in Texas .

31Tudor · 04-09-2013, 05:17 PM

Could also maybe be a bad coil. If they are going bad, you will start off just fine, but when it heats up after a little bit of runnning, it will have those symptoms as well.

Texxracer22 · 04-09-2013, 07:19 PM

Good thinking. I haven't tried yet but I just remembered I am using a radiator cap

christian · 04-09-2013, 07:29 PM

well, radiator caps arent vented.....

Tom Wesenberg · 04-09-2013, 08:12 PM

A dirty trick to pull on someone is to switch the gas and radiator caps when they aren't looking.

Texxracer22 · 04-09-2013, 09:07 PM

I had noticed the cap issue but failed to realize what would happen. I'll try that then the ignition stuff. I leave for a week in the am but I'll post the results later. Thanks for all the info

04-09-2013, 11:52 AM	#2
KMeredith87 Senior Member Join Date: Mar 2013 Location: San Antonio Posts: 178	Re: 29 Model A running funny Out of curiosity as it sat for any period of time with fuel in the tank? Beautiful truck by the way.

04-09-2013, 11:58 AM	#3
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: 29 Model A running funny Had the carbs done by a guy who really knew his stuff. end quote. Just what does that mean ? A little info would be nice.

04-09-2013, 12:13 PM	#5
ford3 Senior Member Join Date: Oct 2012 Location: oroville calif. Posts: 1,453	Re: 29 Model A running funny it may not be the carb, maybe points, coil or condensor, those problems sound like electrical, either one of them getting hot and breaking down

04-09-2013, 12:22 PM	#6
700rpm Senior Member Join Date: May 2010 Location: Portland, Oregon Posts: 6,039	Re: 29 Model A running funny Sponsored Links (Register now to hide all advertisements) How many carbs have you got on it? __________________ Ray Horton, Portland, OR As you go through life, keep your eye on the donut, not the hole.

04-09-2013, 12:25 PM	#7
gweilbaker Senior Member Join Date: May 2010 Location: Lindenhurst, IL Posts: 793	Re: 29 Model A running funny If you have more than the common updraft carb you maybe starving for gas. Maybe a need for a fuel pump if you're running any kind of downdraft carb.

04-09-2013, 11:59 AM	#4
Wife Unhappy Junior Member Join Date: Mar 2013 Location: Gladstone Missouri Posts: 2	Re: 29 Model A running funny Loosen Gas cap and go for another ride.

04-09-2013, 01:49 PM	#8
Duffy1 Senior Member Join Date: May 2012 Location: Mo. City , Texas Posts: 725	Re: 29 Model A running funny Ditto post #4 ; Could be the Gas Cap not venting . Mine did the same thing .

04-09-2013, 02:06 PM	#9
kelley's restoration Senior Member Join Date: May 2010 Location: 60046 Posts: 888	Re: 29 Model A running funny i was told once by a friend who worked on a lot of cars of different types "if you think its carb its probably ignition" so if the gas cap trick doesnt work (i has for me in the past) then check your condensor tk __________________ anyone need some Model A restoration work done in Illinois? shoot me an email for pics and information [email protected]

04-09-2013, 02:08 PM	#10
robw Senior Member Join Date: Mar 2013 Location: PA Posts: 102	Re: 29 Model A running funny Make sure you have a good fuel flow. Disconnect from the carb and let it flow into a Jar for a few minutes. You could have trash blocking the on/off valve, or trash in the sediment bowl.

04-09-2013, 04:43 PM	#11
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: 29 Model A running funny What carb (s) are you running? The original carbs have a brass scren in the top half and it sometimes stays stuck in place when the large nut is removed.

04-09-2013, 05:07 PM	#12
Hicktick Senior Member Join Date: Aug 2011 Location: Hickory Tavern , SC Posts: 422	Re: 29 Model A running funny Could a critter have nested in your muffler ????? Join a local club and get some help .There should be plenty in Texas .

04-09-2013, 05:17 PM	#13
31Tudor Senior Member Join Date: May 2010 Location: North Carolina Posts: 611	Re: 29 Model A running funny Could also maybe be a bad coil. If they are going bad, you will start off just fine, but when it heats up after a little bit of runnning, it will have those symptoms as well.

04-09-2013, 07:19 PM	#14
Texxracer22 Junior Member Join Date: Mar 2012 Location: RosharonTexas, Posts: 6	Re: 29 Model A running funny Good thinking. I haven't tried yet but I just remembered I am using a radiator cap

04-09-2013, 07:29 PM	#15
christian Senior Member Join Date: Aug 2012 Location: Central NJ Posts: 239	Re: 29 Model A running funny well, radiator caps arent vented..... __________________ 1931 Slant Windshield fordor

04-09-2013, 08:12 PM	#16
Tom Wesenberg Senior Member Join Date: May 2010 Location: Mpls, MN Posts: 27,582	Re: 29 Model A running funny A dirty trick to pull on someone is to switch the gas and radiator caps when they aren't looking.

04-09-2013, 09:07 PM	#17
Texxracer22 Junior Member Join Date: Mar 2012 Location: RosharonTexas, Posts: 6	Re: 29 Model A running funny I had noticed the cap issue but failed to realize what would happen. I'll try that then the ignition stuff. I leave for a week in the am but I'll post the results later. Thanks for all the info