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Sucking air
Posted: January 31, 2011, 2:06 pm
by ethan_lanning
So I'm not really sure how to explain it but I'm going to try because I need some help....my 64 was running fine about one month ago but a couple of weeks ago when I got in it to drive it I only made it about two blocks from home and it just died so I checked the fuel filter and there wasn't any fuel there so I went ahead and replaced the manual fuel pump with a new one but the new one wouldn't pump fuel either so I just assumed that my fuel pump eccentric was worn out so I bought an electric fuel pump...after that the truck ran fine for about two days but now it's acting up again...the fuel pump is pumping fuel and the fuel filter right before the carb is full of gas but it also keeps getting alot of pices of rust in it and the carb is spray fuel out but it has alot of air pockets in it and the truck won't stay running...I'm thinking that mabey the floats are plugged up on the carb or possibly the tube that goes inside of my gas tank has a crack in it and the fuel pump is sucking up a mixture of air and gas???any ideas would be helpfull
thanks
Posted: January 31, 2011, 3:17 pm
by Uncle Skip
Ethan, try it with the gas cap off. Maybe your vent in the cap has closed up and you need a new "vented" cap.
U@ss
Posted: January 31, 2011, 4:42 pm
by jwh f-100
Also check your rubber lines..
Posted: January 31, 2011, 5:47 pm
by ABA
jwh f-100 wrote:Also check your rubber lines..
Happened to me. Turned out to be a loose clamp on the rubber hose where the steel tank line meets the steel line that runs the length of the frame under the cab.
Of course I didn't find it till after the truck was towed home and I replaced the fuel pump and the new pump wasn't working either.
Posted: January 31, 2011, 6:11 pm
by Casey 65
the rubber hose can be cracked and sucking air with the fuel.
Posted: January 31, 2011, 8:00 pm
by ICEMAN6166
steel line could be rotten too , sucking its rusty innards into the pump.
Posted: February 16, 2011, 8:07 pm
by ethan_lanning
Well is been awhile since I posted this topic but I'm still having the same problems...since I posted last I have tried it with the gas cap off,I have replaced all the hose clamps,replaced the gas tank and it has new rubber lines on it...so the only things that I can think of that might be wrong now is the lower gasket on the headers are leaking so mabey its heating up the metal line but the line is pretty far away so I don't think that is it...and the rubber line from the fuel pump to the carb runs between the water pump ad timming cover..but my other slick it setup the same way and works fine but it has a manual pump...also the metal line from the cab corner to just before the motor is the original one but I can blow air through it very easily....the problem I am having with it is after driving a block or two it quits getting fuel and dies and will not start again but after sitting for a day it will start right back up and do the same thing all over again
Posted: February 16, 2011, 8:37 pm
by Moose
What carburetor are you running? I had a similar problem with a 66 mustang with a 2 barrel. Ended up being the main bowl gasket holding the float shut!
Moose
Posted: February 16, 2011, 9:48 pm
by ethan_lanning
Holley street dominator 770 4 barrel