1987 cutlass

[87 cut]

hey guys, new to the G-Body Forum. Small problem, my gas is really going fast. I put 25 in and with in 20mins it’s low. Any suggestions on what I should do to solve this issue?
Thanks

 

[TURNA]

look for a puddle under your car

 

[84slow]

look for a puddle under your car

Lol..... All jokes aside what motor you got?... Do you know if your sending unit is accurate at all?. Have you checked plugs filter and all?

 

[87 cut]

Lol..... All jokes aside what motor you got?... Do you know if your sending unit is accurate at all?. Have you checked plugs filter and all?

Plugs new, wires new, motor is olds 305. Recently had an oil change. Im at a stand still, filters clean. Would dirty filters drain gas quickly?

 

[87 cut]

Lol..... All jokes aside what motor you got?... Do you know if your sending unit is accurate at all?. Have you checked plugs filter and all?

And also, fuel sending unit hasnt been checked. But when i knock on tank its very hollow.

 

[565bbchevy]

Olds 307, Do you smell gas? I would first look for leaks, check the tank for wetness especially above the middle seam, check all of your fuel lines from front to back, if everything looks fine then it is probably a faulty sender or possibly a bad ground to the gauge.

 

[87 cut]

Olds 307, Do you smell gas? I would first look for leaks, check the tank for wetness especially above the middle seam, check all of your fuel lines from front to back, if everything looks fine then it is probably a faulty sender or possibly a bad ground to the gauge.

Checked all that everything is dry. No fuel scent. Guauge may be the next thing i check. But to be honest, it works fine. Once its in the yellow its about gone. And thats within an hour or less of driver. A leak may be possible because when parked all night and i go to crank in the morning, fuel hand isnt where it was the day before. It moves down slightly from where it was. Im just confused.

 

[Qdub24]

Sounds like your gas tank may have sprung leak.

 

[87 cut]

Sounds like your gas tank may have sprung leak.

I just got to find it. Traced lines yesterday and felt tank both were dry. Gas scent isnt there. Thats why im confused.

 

[565bbchevy]

I am not sure if it applies but I once had a Pontiac engine that had a fuel leak, it seems there is a seep hole on the mechanical fuel pump and the pump diaphragm went and it would shoot fuel out of this hole while I was driving but not at idle and it took a while to figure out where my gas was going.