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02-08-2015, 06:39 PM | #1 |
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Back firing and lugging
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.
Last edited by redroadster; 02-08-2015 at 06:40 PM. Reason: spelling |
02-08-2015, 07:30 PM | #2 |
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Re: Back firing and lugging
What carburetor are you using??
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02-08-2015, 07:39 PM | #3 |
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Re: Back firing and lugging
crap in the fuel line/filter slowing the fuel flow Back blow it clear.
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02-08-2015, 07:41 PM | #4 |
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Re: Back firing and lugging
open GAV more.
never hurts to play with GAV
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02-08-2015, 07:47 PM | #5 |
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Re: Back firing and lugging
How's the timing? Is the GAV open at all?
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02-08-2015, 07:51 PM | #6 |
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Re: Back firing and lugging
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02-08-2015, 07:56 PM | #7 |
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Re: Back firing and lugging
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? |
02-08-2015, 08:22 PM | #8 | |
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Re: Back firing and lugging
Quote:
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.
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02-08-2015, 08:25 PM | #9 |
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Re: Back firing and lugging
Yay, Bill, for keeping it simple. Try the commonest easiest things first.
If you hear hoofbeats, do you firstly think horses....or zebras.....
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02-08-2015, 08:52 PM | #10 |
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Re: Back firing and lugging
This is my vote. Especially if there is less then 500 miles on recently replaced points.
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02-08-2015, 09:05 PM | #11 |
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Re: Back firing and lugging
all good advice check your basic settings then do a diagnosis
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02-08-2015, 09:11 PM | #12 |
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Re: Back firing and lugging
My dad always said check the dimple things first because it is seldom that complicated. Wayne
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02-08-2015, 09:12 PM | #13 |
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Re: Back firing and lugging
Surprised ...... nobody mentioned to check the condenser ... yet.
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02-08-2015, 09:18 PM | #14 |
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Re: Back firing and lugging
Also glad to hear from Bill again !!!!!!!!!
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02-09-2015, 01:14 PM | #15 | |
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Re: Back firing and lugging
Quote:
Bill W.
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02-09-2015, 02:42 PM | #16 |
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Re: Back firing and lugging
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02-09-2015, 03:26 PM | #17 |
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Re: Back firing and lugging
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 |
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