Is there a fuel filter?

[Rex M.]

I've got an early 1970 Vette. The engine acts like it's running out of gas. Fuel pump is less than 10,000 miles. Checked the filter in carb and it's clean. Is there another fuel filter under the car? I have a "Vented" gas cap, suppose it's a 69 style tank as it was a first or second day production car.

[Joe L.]

Re: Is there a fuel filter?

I've got an early 1970 Vette. The engine acts like it's running out of gas. Fuel pump is less than 10,000 miles. Checked the filter in carb and it's clean. Is there another fuel filter under the car? I have a "Vented" gas cap, suppose it's a 69 style tank as it was a first or second day production car.

Rex-------

Unless someone has added an inline filter, the only fuel filter for your car is the carb inlet filter.

Early 1970 Corvettes were not equipped with 1969-type fuel tanks (i.e. tanks without an integral pressure/vacuum valve). In fact, late 1969 Corvettes (i.e. after about August, 1969) were equipped with the 1970 style tanks (i.e. tanks with an integral pressure/vacuum valve). However, I'm certain that the vented cap should not cause the problems you described. Late 1969's originally equipped with the 1970 style tank were also originally equipped with the vented caps. I drove my original owner, late 1969 for many years so-equipped and experienced no such problem as you described.

Could your car being an extremely early 1970 have been originally equipped with the vented gas cap? I suppose it's possible.

[Gary R.]

Re: Is there a fuel filter?

One quick check you can do is look at the rubber fuel line from the tank steel line to the fuel pump. Is it the molded "s" hose or regular fuel line used? If it's not the molded S hose it can collapse and choke off fuel. I had one that idled fine and low rpm was ok but once the load picked up the carb bucked and almost stalled. Replaced the fuel hose with the correct S molded hose and solved the problem.

[Terry M.]

Re: Is there a fuel filter?

One quick check you can do is look at the rubber fuel line from the tank steel line to the fuel pump. Is it the molded "s" hose or regular fuel line used? If it's not the molded S hose it can collapse and choke off fuel. I had one that idled fine and low rpm was ok but once the load picked up the carb bucked and almost stalled. Replaced the fuel hose with the correct S molded hose and solved the problem.

Good point Gary. My January 29 1970 LT1 did not originally come with the molded "S" hose. It got one soon after, but by my hand. Rex might want to check the condition of both fuel line rubber hoses. I guarantee you the originals do not like today's swill that passes for pump gasoline.

Their is also the "sock" in the fuel tank to inspect using a flashlight through the furl tank filler opening. If there is corrosion in the fuel tank the sock can become plugged.