71charger
Settling In
SE Chargers Rock
Posts: 168
|
Post by 71charger on Mar 30, 2011 1:19:41 GMT -5
Guys,
I have noticed that after sitting for a few days that the fuel has drained back to the tank from my carb. Isn't there supposed to be some kind of check valve in the fuel pump?
It's been this way since I bought it in 2001 and really haven't driven it much since. All I know is it will start up right away if its been run a day or 2, but let it sit for more than a 3 days and it takes forever to start her back up.
I have changed the carb from the stock original to a Holley 4bbl a couple years ago.
My brother who has a 70 Charger seems to have the same problem. He thinks it has to do with the fuel having been reformulated over the years for FI and now the carb running vehicles are suffering. Not sure about this myself, though.
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 30, 2011 3:46:14 GMT -5
Welcome to the "Ain't got fuel" club. Mine does the same thing as well as most other mopar owners. There are modifications you could do and one would be a electric fuel pump. There have been topics about this problem posted on both sites. If you find a good cure let us know. Bob
|
|
Griff
New Member
Posts: 27
|
Post by Griff on Mar 30, 2011 6:02:25 GMT -5
I have a 72 with the same issue's. I've changed fuel pumps, so I don't think that it's that. I think my problem is that the carb is leaking down.
|
|
|
Post by odzking on Mar 30, 2011 7:18:01 GMT -5
My 67 AFB does exactly that. If it's longer that 24 hours sitting, it just cranks. But starts after the fuel gets there. I tried a new fuel pump (not electric), spacer, new gasket. Still does it. I just live with it now.
|
|
|
Post by canadian74se on Mar 30, 2011 9:13:14 GMT -5
I have the same issue, but I prefere it actually. Mine takes about a week or more to empty and usually if it sits that long, I'm going to be working on it. If its empty i might have to tap the gas pedal but i haven't yet, it always just starts up first time.
Most cars that i know do the same thing. I never though of it as a problem, just need to pump the pedal two maybe three times to dump the last drops of fuel in to fire a few cylinders then it sucks the fuel from there.
If its a major issue, i would check your seals in the carb, if they are dried otu they allow the fumes to escape and thus your fuel will evaporate. Even any kind of fuel system air leaks could cause this IMO. I had a edelbrock 4150 carb and it always drained fuel into the engine/intake or back to the tank but rarely lol It was hard to start, aweful gas milage, so i went with a custom built Holley from Bigs in WI and i get twice the gas milage, always starts and as i said it takes awhile for the fuel to drain back and even when it does its almost instant it refills ( stock fuel pump). So maybe i would just check your carb, wait 3 days before you do so then you don't have any leaking gas on the engine in your case. I have the see through holes in my holley so i can see what the fuel is up to lol
|
|
|
Post by ScottyB on Mar 30, 2011 18:08:58 GMT -5
|
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Mar 30, 2011 20:00:55 GMT -5
More of a question than a statement.....but I wonder if our current ethanol blends are more prone to evaporation?
|
|
71charger
Settling In
SE Chargers Rock
Posts: 168
|
Post by 71charger on Mar 30, 2011 22:02:09 GMT -5
Where did you put it? Before or after the pump?
|
|
DynoDave
CO-ADMINISTRATOR
Motown Mopar-Wizard
Posts: 11,169
|
Post by DynoDave on Mar 31, 2011 5:49:50 GMT -5
More of a question than a statement.....but I wonder if our current ethanol blends are more prone to evaporation? Absolutely. They also boil more easily, which can leave the bowl dry (and also aggravates vapor lock problems when running). I'm not familiar enough with the Holley design to know if they have a place to leak fuel from the bowl like a TQ o-ring or Q-Jet well plug. This is a common complaint with those carbs, and easy to fix.
|
|
|
Post by ScottyB on Mar 31, 2011 11:49:39 GMT -5
i put by the tank in the back so the carb bowl and line would remain full with fuel.
|
|