Brand new tank, nothing else has changed except the carb/motor is not getting the flamable stuff. What in world could have happend?

check your fuel lines for a restriction.you may have a kink in one of the hoses or steel lines.if that dont work,take the line off the fuel pump and tank and try to blow air through it.if you can blow air through it,you did something wrong when you installed the sending unit.make shur your fuel pump is working before you do anything.pour some gas in the carb and put your finger over the inlet of the fuel pump to see if it is sucking.

years ago, when i changed mine, i snapped the tiny ground wire when removing the tank, and nearly forgot about it when i put it back in. i say "nearly" because, after it wouldn't start, i knew what i had done. :rolleyes:

Would a ground wire off the tank cause the motor to not get fuel? I thought any wires on the tank is for fuel gauge reasons.

how many gallons of gas in a brand new tank do you think it may take to run to the fuel pump?

It will take more than 3 gallons of fuel in the tank to get it to pump. The tanks are about 18 gal. while you can only usually put 15 gal. in at any point in time. So 3 or more gallons of fuel will be required to get it all flowing.

Hope it is just that simple for you!
Good luck - Brett - 67 Drop Top 455!

sorry about the misinfo. i think i have my memories mixed up. too many cars, not enough sleep. musta been one w/ electric pump.

Thanks alot Brett! lol
Just a year too late w that info. ,thats exactly why I now have an 'extra' tank for 69....! I ran out of gas , filled it up ,only got 15 gals. in it...thought former owner had put a 'cheap' 15 gal tank on and decided to replace w the 'real' thing! got my 18 gal from Classic including new straps ( since I knew 18 must be larger than 15 I wouldnt be able to re-use the old ones!) , installed tank and found they were the same size! ended up using the same straps , sold the extra ones , now stuck w an almost new used tank that cannot be shipped!
Trying to GIVE it away , but needs to be to someone that can pick it up in Houston...

I guess you learn from mistakes! :rolleyes:

Bjorn

Aw Bjorn, you know your not truly happy unless you can hunt down a part, and replace something at least once a month on the bird! I think you just wanted to have a shinny tank, instead of a painted one! Lol...

Brett!

doh! I hate it when I buy new parts for no reason!

hehehe

Check all of your rubber fuel lines, the one going from sending unit to the fuel line near the gas tank, theres one underneath the fuel pump, and one under the passenger side exhaust manifold, or at least thats what is on my 69. After re-installing my gas tank I noticed the one coming from the sending unit was kinking up. When reinstalling the gas tank I found it's best to go slow and check everything as you get it back in place.

Sure Brett ,that shiny tank looks lots better , but those $$ could have been better used!
Bjorn

no kinks. new fuel pump. hose is not glogged. 4.5 gallons fresh fuel. still nothing.

Is the tank vented right?

Q

My gas tank has no vent line, but vented cap...do you have either...?
Bjorn

i dunno . . . try running a line from a can of fuel to the pump inlet from a gas can. just to eliminate the rear portion of the fuel system. then you can be absolutely sure you're working in the right direction. even new fuel pumps can go bad. you can do everything right and still have a problem somewhere. let us know what it ends up being. i'm getting more curios everytime i check in.

you may have to drop the tank again to see if you have the screen kinked.if it is not sitting in the right posision it will cause you problems

nothing yet here guys. I am hoping not to have to drop the tank seeing it was kind of bear to strap in, besides i kept putting more and more fuel in it. although im bumming to run this new car.

A little gas tank trivia: Stock cars had to drag race with full tanks, and tanks were checked with a stick.

Pontiac was known for its cheating at hp rating and other things. The installation of the tank was yet another way that Pontiac cheated.

Instead of mounting the tank so that it would hold 18 gallons, Pontiac mounted the tank tilted upward so that a large air pocket remained, thus, the reason why you can only squeeze 15 gallons into the 18 gallon tank.

This is how I'd tackel the problem. First, I'd verify that the gas indeede comes out of the sending unit. Use an electic feul pump or safely run a test line.

Next, I'd attach a feul source to the line and see what happens. It's has to be one or the other because I realize that you're intellegent enough to know that if you had a vent problem, it would start, and run for however long; then, you'd get a vacume release when you removed the cap.

Got It!!! just happend to be a faulty (new) fuel pump. Ran out of options figured i would start all over, believe it or not you can get bad parts.

Glad the problem is solved. And a relatively easy solution. Nice...

Brett - 67 Drop Top 455!

Excellent! I get a good warm feeling when I know a birds problem has been corrected!

Thanks to the guys on this site my bird runs like a champ and has come a long way since I purchased it.

dont feel bad,over 20 plus years in the auto business,i have recieved my share of defective parts.it can be frustrating