jimmies442

I rebuilt the enigne with original 4gc carb, new fuel pump, pulled tank and cleaned it, and she starts and runs like a champ. After she gets warm it seems to quit pumping fuel as I notice the fuel filter goes empty.....even at idle it wont fill up This only does it after 10 mintes of warmup time. Is that what happens with a faulty fuel pump? I'm changing it out tomorrow but maybe someone bought a bad pump outta the box too or I have other issues. Fuel lines new btw except for the steel one along frame, but it cant be clogged because at startup i have lots of fuel

oldcutlass

I would not assume that the fuel pump is not working properly just looking through the clear fuel filter. What I would do is throw a fuel pressure gauge on t and see what it's doing. Does the car stall or fall on it's face during a long wot run?

MDchanic

Do you have any actual running problems, or do you just not like the looks of the fuel filter?

- Eric

jimmies442

car starts right up, fuel filter fills up and I can go about 5 miles or til its warm/hot, then yes it starts spittin and jerking hard

oldcutlass

Double check all your fuel lines, if all your lines look good then a new fuel pump is probably the likely culprit.

jimmies442

Yea I'll find out tomorrow and post it. Someone said the diaphram might have a tear in it. Got me a carter pump commin in.......no more shucks orielly in a box crap I shuda known better

Ozzie

A pressure and volume test on the fuel pump should tell you if there is a problem with it or anything further back in the line or tank.

nsnarsk65cutlass

Put a vacuum gauge on the suction side of the pump,also you may have rust holes in the frame line.

jag1886

Check your gas cap also, should be vented if not it can cause a vacuum in the tank stopping the fuel from coming out.