Fuel filter - The 1947 - Present Chevrolet & GMC Truck Message Board Network

rusty baker · 08-01-2010, 01:44 PM

Did these trucks originally have a fuel filter? Mine has the original steel gas lines and no filter. Did they have an undercab filter like some of the other trucks? I would hate to cut the lines to put in a filter. It's a 1970 with a 250.

sjarrett71 · 08-01-2010, 01:49 PM

It was probably inside a fitting on the carb where the fuel line scres into. Maybe a brass or paper element.

rusty baker · 08-01-2010, 01:50 PM

No in -the -tank -screen or undercab filter?

hayhauler71 · 08-01-2010, 02:05 PM

fuel tank sock on fuel sending unit

Shyguy · 08-01-2010, 02:45 PM

The only filters these trucks had from the factory was in the inlet of the carb, very small filter. There also is a sock style filter on the fuel pickup in the tank.

Some people take the small filter out of the carb and put a larger filter between the fuel pump and the carb.

It is not recommended to put a filter between the tank and the pump because it could cause vapor lock problems.

rusty baker · 08-01-2010, 02:52 PM

Thanks, just wondered. Guess that 1 year old fuel pump is gone. All the Ford trucks and vans had an undercab filter. I have a bad hip and have trouble crawling under anymore.

kevmic28 · 08-02-2010, 12:53 AM

Why do you say the fuel pump is gone? Im having an issue with mine in that it gets vapor lock. Not because of the fuel filter but because its so damn hot outside (100 plus today) combined with the intake temps Im boiling the gas inside the carb causing a vapor lock in my line from the pump to the carb. Im going to pick up a carb spacer tomorrow and that should finally solve my problem. I have a stock intake and a rochester carb. It has a small plastic spacer but its like only a 1/4 inch thick.

rusty baker · 08-02-2010, 09:46 AM

I'm not getting gas out of the pump.

Shyguy · 08-02-2010, 09:57 AM

Have you checked the two rubber hoses in the fuel line? There is one under the cab and one at the suction side of the fuel pump. Mine had cracks in them causing the fuel pump to suck air.

Before you replace your fuel pump you should disconnet the suction hose and blow a little air pressure back into the tank to make sure it is not a plugged line. First take the gas cap off before applying air pressure.

rusty baker · 08-02-2010, 04:57 PM

I'll try that if it ever cools off. It's 103F right now with 120F heat index.

red71cheyenne · 08-02-2010, 05:28 PM

Quote:

Originally Posted by rusty baker

I'll try that if it ever cools off. It's 103F right now with 120F heat index.

Good lord. Why am I moving back there when I retire?

rusty baker · 08-02-2010, 05:49 PM

This is me today.

Shyguy · 08-02-2010, 06:10 PM

Quote:

Originally Posted by rusty baker

I'll try that if it ever cools off. It's 103F right now with 120F heat index.

I thought it was hot here in flatlands of Southeast Missouri, but it is cool compared to where you are.

The humidity here is unbearable though.

rusty baker · 08-02-2010, 06:22 PM

They say it will only last til October.

raycow · 08-04-2010, 03:33 AM

Before you unbolt that pump.....

Disconnect the inlet line, hold your finger over the port, and have a helper crank the engine. Do you feel any suction? If yes, don't replace the pump unless you have just plain run out of other things to do with your money.

Ray

rusty baker · 08-04-2010, 11:24 AM

That's the problem. Don't have any money.

jondancer · 03-11-2013, 10:22 PM

Can you get replacement filters for the original carb?
Posted via Mobile Device

GASoline71 · 03-11-2013, 10:24 PM

Yes.

Gary

magwakeenercew2jh · 03-11-2013, 11:05 PM

Anybody try an electric fuel pump with a fuel filter on it with an otherwise stock truck (meaning, tank in the cab, no FI, etc.)?

Right now, I'm replacing the fuel delivery system from a newly and properly cleaned (boiled out) up to the carb.
And, I'm always wondering about even NEW fuel pumps.

I'll try the "suck test", raycow offered back in 2010 (thanks for that, BTW), but wouldn't it be nice just to block it off and call it "done"....
....Time, and technology, marches on, no?

08-01-2010, 01:44 PM	#1
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Fuel filter Did these trucks originally have a fuel filter? Mine has the original steel gas lines and no filter. Did they have an undercab filter like some of the other trucks? I would hate to cut the lines to put in a filter. It's a 1970 with a 250. __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein Last edited by rusty baker; 08-01-2010 at 01:44 PM.

08-01-2010, 01:49 PM	#2
sjarrett71 Registered User Join Date: Dec 2006 Location: Rolla, MO Posts: 2,463	Re: Fuel filter It was probably inside a fitting on the carb where the fuel line scres into. Maybe a brass or paper element. __________________ -Scott-

08-01-2010, 01:50 PM	#3
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Fuel filter No in -the -tank -screen or undercab filter? __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein Last edited by rusty baker; 08-01-2010 at 01:51 PM.

08-01-2010, 02:05 PM	#4
hayhauler71 Registered User Join Date: Aug 2009 Location: St. Paul MN. Posts: 1,996	Re: Fuel filter fuel tank sock on fuel sending unit __________________ Fuzzy

08-01-2010, 02:45 PM	#5
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: Fuel filter The only filters these trucks had from the factory was in the inlet of the carb, very small filter. There also is a sock style filter on the fuel pickup in the tank. Some people take the small filter out of the carb and put a larger filter between the fuel pump and the carb. It is not recommended to put a filter between the tank and the pump because it could cause vapor lock problems. __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

08-01-2010, 02:52 PM	#6
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Fuel filter Thanks, just wondered. Guess that 1 year old fuel pump is gone. All the Ford trucks and vans had an undercab filter. I have a bad hip and have trouble crawling under anymore. __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein

08-02-2010, 12:53 AM	#7
kevmic28 Registered User Join Date: Jun 2009 Location: Arlington Texas Posts: 602	Re: Fuel filter Why do you say the fuel pump is gone? Im having an issue with mine in that it gets vapor lock. Not because of the fuel filter but because its so damn hot outside (100 plus today) combined with the intake temps Im boiling the gas inside the carb causing a vapor lock in my line from the pump to the carb. Im going to pick up a carb spacer tomorrow and that should finally solve my problem. I have a stock intake and a rochester carb. It has a small plastic spacer but its like only a 1/4 inch thick. __________________ 1970 GMC truck 1988 Harley 1200 Sportster

08-02-2010, 09:46 AM	#8
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Fuel filter I'm not getting gas out of the pump. __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein

08-02-2010, 09:57 AM	#9
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: Fuel filter Have you checked the two rubber hoses in the fuel line? There is one under the cab and one at the suction side of the fuel pump. Mine had cracks in them causing the fuel pump to suck air. Before you replace your fuel pump you should disconnet the suction hose and blow a little air pressure back into the tank to make sure it is not a plugged line. First take the gas cap off before applying air pressure. __________________ '67 Chevy C-20 short stepper - build complete, 454/SM-465. '75 C-30 Single Cab DRW-350 small block/NP-435. '77 GMC-6500 Dump Truck, 427 Tall Deck. '92 GMC K-3500 Duallie, 454/4L80E.

08-02-2010, 04:57 PM	#10
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Fuel filter I'll try that if it ever cools off. It's 103F right now with 120F heat index. __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein

08-02-2010, 05:49 PM	#12
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Fuel filter This is me today. Attached Images __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein

08-02-2010, 06:22 PM	#14
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Fuel filter They say it will only last til October. __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein

08-04-2010, 03:33 AM	#15
raycow Registered User Join Date: Mar 2003 Location: San Francisco, CA USA Posts: 2,454	Re: Fuel filter Before you unbolt that pump..... Disconnect the inlet line, hold your finger over the port, and have a helper crank the engine. Do you feel any suction? If yes, don't replace the pump unless you have just plain run out of other things to do with your money. Ray

08-04-2010, 11:24 AM	#16
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Fuel filter That's the problem. Don't have any money. __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein

03-11-2013, 10:22 PM	#17
jondancer Registered User Join Date: Jul 2010 Location: central michigan Posts: 1,192	Re: Fuel filter Can you get replacement filters for the original carb? Posted via Mobile Device



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03-11-2013, 11:05 PM	#19
magwakeenercew2jh RAT1968 '68 Cab/'71 Parts Join Date: Feb 2002 Location: Coarsegold, CA Posts: 2,375	Re: Fuel filter Anybody try an electric fuel pump with a fuel filter on it with an otherwise stock truck (meaning, tank in the cab, no FI, etc.)? Right now, I'm replacing the fuel delivery system from a newly and properly cleaned (boiled out) up to the carb. And, I'm always wondering about even NEW fuel pumps. I'll try the "suck test", raycow offered back in 2010 (thanks for that, BTW), but wouldn't it be nice just to block it off and call it "done".... ....Time, and technology, marches on, no? __________________ M17 Coarsegold, CA RAT's shiny now. But always a rat. Last edited by magwakeenercew2jh; 03-11-2013 at 11:12 PM.

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