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Re: Vapor Lock
[Re: cornet684me]
#836983
10/24/10 06:52 PM
10/24/10 06:52 PM
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Joined: Apr 2010
Posts: 1,216
Under My Car
Mopar_Country
pro stock
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pro stock
Joined: Apr 2010
Posts: 1,216
Under My Car
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Quote:
this pic is after the engine has set for about 2 to 3hours, see the fuel filter is full, however once it heats up, the fuel filter gets empty and bubbles
Because it is boiling, you need a good metal line and fuel filter. Less line above the engine would help with you're heat issues too. The setup you have now could turn to fire.
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Re: Vapor Lock
[Re: Mopar_Country]
#836984
10/24/10 07:45 PM
10/24/10 07:45 PM
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Joined: Dec 2007
Posts: 1,639
Brandon, Ms
cornet684me
OP
top fuel
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OP
top fuel
Joined: Dec 2007
Posts: 1,639
Brandon, Ms
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i have changed the complete set up, i do not have a rubber line anymore, i have switched around the inlet and also added a metal line from the fuel pump to the fuel filter, i do not have a fire hazzard anymore, however i still do have the bubbles, a friend sd could be the sending unit in the tank, i am going to test this and get back on
thanks
Randy
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Re: Vapor Lock
[Re: cornet684me]
#836988
10/24/10 07:54 PM
10/24/10 07:54 PM
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Joined: Dec 2007
Posts: 1,639
Brandon, Ms
cornet684me
OP
top fuel
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OP
top fuel
Joined: Dec 2007
Posts: 1,639
Brandon, Ms
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everybody i have talked with has said i do not have vapor lock, the car is only running at about 180on temp gauge , and i have not run the car long enough are driven enough miles to actually have vapor lock, i have narrowed it down to , something to do with the fuel pump, maybe the fuel pump rod or the lobe on the cam, however is brand new cam, or the sending unit in the tank is stopped up, i am going to test for the sending you by running the car from a gas can and i will post the results
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Re: Vapor Lock
[Re: cornet684me]
#836989
10/24/10 08:35 PM
10/24/10 08:35 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
everybody i have talked with has said i do not have vapor lock, the car is only running at about 180on temp gauge , and i have not run the car long enough are driven enough miles to actually have vapor lock, i have narrowed it down to , something to do with the fuel pump, maybe the fuel pump rod or the lobe on the cam, however is brand new cam, or the sending unit in the tank is stopped up, i am going to test for the sending you by running the car from a gas can and i will post the results
Your doing good  , i would've choosed a "metal" filter over that plastic one though, so its something to think about, now as for the "bubbles" that you are seeing, I'll bet its just "air" NOT vapor lock, your obviously not running it long enough for vapor lock from "heat", but because theres starvation in the lines, its causeing "cavitation" & air.
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Re: Vapor Lock
[Re: joedust451]
#836990
10/24/10 09:21 PM
10/24/10 09:21 PM
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Joined: Dec 2007
Posts: 1,639
Brandon, Ms
cornet684me
OP
top fuel
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OP
top fuel
Joined: Dec 2007
Posts: 1,639
Brandon, Ms
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okay, i by passed the gas tank with a plastic container, the fuel pump is not pulling fuel into the fuel filter, or lets say the fuel pump is not keeping the fuel filter full of fuel, it will idle and i did not run it till normal temp, however,is the fuel filter suppose to be full of fuel at idle? 
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Re: Vapor Lock
[Re: cornet684me]
#836991
10/24/10 09:22 PM
10/24/10 09:22 PM
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Joined: Dec 2007
Posts: 1,639
Brandon, Ms
cornet684me
OP
top fuel
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OP
top fuel
Joined: Dec 2007
Posts: 1,639
Brandon, Ms
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the car is idling and the fuel filter is not full of gas
Last edited by cornet684me; 10/25/10 10:25 PM.
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Re: Vapor Lock
[Re: cornet684me]
#836992
10/24/10 09:24 PM
10/24/10 09:24 PM
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Joined: Dec 2007
Posts: 1,639
Brandon, Ms
cornet684me
OP
top fuel
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OP
top fuel
Joined: Dec 2007
Posts: 1,639
Brandon, Ms
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this pic was after i turned the car off, at idle the fuel filter was almost empty, i replaced the fuel pump last week, i got the fuel pump from auto zone, the cam was replaced a couple of months ago, i never had this issue before, so either i got a bad fuel pump or there is something wrong with the fuel pump rod, what should i do next? 
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Re: Vapor Lock
[Re: ireland383]
#836995
10/24/10 10:53 PM
10/24/10 10:53 PM
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Joined: Feb 2005
Posts: 709
St Louis, MO 63026
convx4
super stock
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super stock
Joined: Feb 2005
Posts: 709
St Louis, MO 63026
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I believe that the problem is with the fuel. If your tank of fuel is old and low, the ethanol could have separated from the gasoline. There have been reports of higher than 10% causing major damage. Modern cars with there fuel injection raise the boiling point of today's fuel so they don't have vapor lock problems. In our old cars today's fuel will boil at 100 degrees. I have a post on adding a fuel return line to fight vapor lock, Lots of good advice. https://board.moparts.org/ubbthreads/showflat.php?Number=6209669&page=0
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Re: Vapor Lock
[Re: cornet684me]
#836996
10/24/10 11:08 PM
10/24/10 11:08 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
okay, i by passed the gas tank with a plastic container, the fuel pump is not pulling fuel into the fuel filter, or lets say the fuel pump is not keeping the fuel filter full of fuel, it will idle and i did not run it till normal temp, however,is the fuel filter suppose to be full of fuel at idle?
In most cases it "will not" keep the filter completely full.
Did you blow back through the line to check for restriction??
When doing your volume test, was there enough fuel in the test tank & was the line down in there good so as not to suck air??
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Re: Vapor Lock
[Re: cornet684me]
#836997
10/24/10 11:16 PM
10/24/10 11:16 PM
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Joined: Feb 2005
Posts: 5,221
Branson, Mo.
joedust451
super gas
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super gas
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
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Quote:
okay, i by passed the gas tank with a plastic container, the fuel pump is not pulling fuel into the fuel filter, or lets say the fuel pump is not keeping the fuel filter full of fuel, it will idle and i did not run it till normal temp, however,is the fuel filter suppose to be full of fuel at idle?
You really need to do the testing like i mentioned earlier, get 2 gas cans at least 2 gal. ones or larger, use the 1 as a inlet & fill it with fuel, use the other as the outlet & fire it up (when its warm & carb has gas in it), don't worry about the filter, just run rubber hose on "both" sides for testing, your wanting to rule out the pump & rod, if the pump doesn't put out a nice steady flow of fuel while idleing, then either the pump is bad or the rod is warn, & while you have it like this after your testing, you can then pop a hose on the cars fuel line going back too the tank & check for blockage.
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Re: Vapor Lock
[Re: convx4]
#836999
10/25/10 12:08 AM
10/25/10 12:08 AM
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Joined: Dec 2007
Posts: 1,639
Brandon, Ms
cornet684me
OP
top fuel
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OP
top fuel
Joined: Dec 2007
Posts: 1,639
Brandon, Ms
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the car was my everyday driver for about 5years, and then about 3years ago, i tore it down and reistalled a 440 , took off the tank, painted it and reinstalled, i have gone to the store and kept about 5gallons of gas at a time in the car , i have been cranking the car about once a week and driving around the block, at least once amonth around the block, so the gas should not be old in the tank, i did blow back thur the fuel line going to the tank and it felt like blowing on a garden hose, no restrictions, i am thinking it is not the tank, however , i need to perform the test with the inlet in container and the outlet in another to gauge the fuel pump, i did not understand the directions before
thanks
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