Back firing and lugging

[redroadster]

I have a 1929 Roadster Pick-up everything runs good down the road until I get past about 35 or 40 and if I try to get down on it (press the accelerator more) it backfires and acts like it is starving for fuel, I have cleaning out the fuel bowl and it is not the gas cap, loosening it or taking it off doesn't help.

 

[Dick Webber]

What carburetor are you using??

 

[Clem Clement]

crap in the fuel line/filter slowing the fuel flow Back blow it clear.

 

[tbirdtbird]

open GAV more.
never hurts to play with GAV

 

[MrBruce]

How's the timing? Is the GAV open at all?

 

[fiddlybits]

Reset your point gap. It has closed up.

 

[H. L. Chauvin]

Like in a doctors office, if it is strictly a fuel related problem, important answers to a few more simple fuel questions may help:

1. Has it always done this?
2. If not, how long has it been doing this?
3. What is a guess as to an average how many miles it runs per week?
4. Do you have a metal, vertical, cylindrical filter in your gas tank above the shut off valve?
5. Do you have any other fuel filters, & if so where?
6. How old is the fuel?
7. Does it have an air filter?

 

[BILL WILLIAMSON]

Like in a doctors office, if it is strictly a fuel related problem, important answers to a few more simple fuel questions may help:

1. Has it always done this?
2. If not, how long has it been doing this?
3. What is a guess as to an average how many miles it runs per week?
4. Do you have a metal, vertical, cylindrical filter in your gas tank above the shut off valve?
5. Do you have any other fuel filters, & if so where?
6. How old is the fuel?
7. Does it have an air filter?

BUT, if we list 219 different things, it's surely one of them at fault!!
First, open up the GAV gradually, if it runs properly, you're through.
If that doesn't help, close the choke gradually & slowly, if that helps, then do a systematic check to find the culprit.
Bill W.

 

[tbirdtbird]

Yay, Bill, for keeping it simple. Try the commonest easiest things first.
If you hear hoofbeats, do you firstly think horses....or zebras.....

 

[30ccpickup]

Reset your point gap. It has closed up.

This is my vote. Especially if there is less then 500 miles on recently replaced points.

 

[Mitch//pa]

all good advice check your basic settings then do a diagnosis

 

[C26Pinelake]

My dad always said check the dimple things first because it is seldom that complicated. Wayne

 

[H. L. Chauvin]

Surprised ...... nobody mentioned to check the condenser ... yet.

 

[H. L. Chauvin]

Also glad to hear from Bill again !!!!!!!!!

 

[BILL WILLIAMSON]

Yay, Bill, for keeping it simple. Try the commonest easiest things first.
If you hear hoofbeats, do you firstly think horses....or zebras.....

I thought of my Italian friend down @ the bank---The Loan-A-Ranger!!
Bill W.

 

[Y-Blockhead]

Surprised ...... nobody mentioned to check the condenser ... yet.

What's your procedure to "check the condenser"?

 

[H. L. Chauvin]

Just quickly reviewed the magic word "condenser" under "Search" in the Ahooga archives.

In our Model A Forum guessing games, as to what causes a particular unseen engine problem located hundreds of miles away, according to the "Search" tool, this one little part is guessed at as "the" engine problem, accompanied by 419 condenser messages. LOL