Hybrid View
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10-27-2016 12:00 PM #1
1963 409
I have a 1963 Impala with a 409. It has one 4bbl. Every time I add gas to the car it immediately acts like it's running on 6 cylinders. It bucks, surges, doesn't want to idle, and this goes on for about 20 miles before it starts running 'normal' again. The car will run normal until I add gas again. The inside of the exhaust pipes is sooty black indicating it is running rich? I would appreciate any help. This is driving me crazy.
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10-27-2016 12:55 PM #2
tank vented ?
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10-29-2016 09:54 AM #3
yes. new stainless tank and it is vented. where is bluff dale? i lived in the Houston area for 44 years
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11-01-2016 11:16 AM #4
the tank is vented. if I cant figure this problem out I may get a holley. I called edelbrock and the guy said it shouldn't be the metering rods because the carb is only 600cfms. original stock was only 580cfms. and since this is happening when i put gas in the tank could the extra head pressure be putting gas into the carb through the fuel pump somehow?
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11-01-2016 11:20 AM #5
new vented tank with new vented cap
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10-29-2016 09:51 AM #6
about 14000 miles on motor; only driven about twice a week; i've had the car since March in which I installed an edelbrock carb; vacuum hoses are ok; gas cap is new vented; no sign of gas leakage around carb; all gaskets look ok; warm year round here. I was told yesterday that it is my metering rods in the edelbrock that are wrong size. That the carb is loading up. What do you think? I appreciate the help.
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10-29-2016 11:24 AM #7
If it were mine I'd rebuild the Carter and sell the Eddy.Ken Thomas
NoT FaDe AwaY and the music didn't die
The simplest road is usually the last one sought
Wild Willie & AA/FA's The greatest show in drag racing
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11-01-2016 11:31 AM #8
bluffdale is southwest of Ft Worth about 50 miles? sounds like deer country to me.
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10-29-2016 11:51 AM #9
That single Carter AFB on 409 was one of my favorite carbs until Holleys developed some improments
And the Ford aircleaner fit them--------
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11-01-2016 11:18 AM #10
I may have to get a holley
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11-01-2016 03:54 PM #11
most of my neighbors are bovine .
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11-01-2016 06:01 PM #12
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11-02-2016 09:05 AM #13
is this the only time it does it ? if you pull in from a cruz does it do the same ? i would come in hot and remove the air cleaner to see if it is peculating fuel into the intake.
does it have a Phenolic spacer under the carb. it's loading up when killed hot.
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11-02-2016 08:28 AM #14
What does it do if you just stop for a bit and open gas cap for a few minutes then put cap back on and start it up?????? do this and make sure engine is same temp and amount of time is the same-----
Sounds a little like maybe your tank/system isn't vented---faulty cap? is there a sucking sound when you loosen cap?
If its not from fuel system--it could be that the valve stem seals have failed and fallen off the stems----then they block the oil return holes, valve covers fill with oil, loose stems/guides-oil runs down into ports/cylinders fouling plugs on start up after SHORT interval--------if its allowed to set for hours and cool completely off the oil will seep back into the pan---------
Hey Ryan, have a quick question for you. Is the dual quad intake on your 40 a factory Chrysler piece or a Weiand? Looking at pictures of the Weiand 7263 it appears to be an almost exact copy of...
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