fuel cut out problem

[Johnny Blaze]

I don't think the tank has a sock from what I have seen in the catologs.

Fuel filter has been replaced.

I changed the fuel hose between the metal line on frame and the pump.

Did not help either.

Tach and voltmeter do not do anything erratic when it happens either.

when it does it, I slow down to 45 and it runs fine, you try to tip in the pedal any and it just 'bogs' for lack of better description.

You can drive for miles at 45 and it is fine, but it will not go over that once it has happened.

[NOT A TA]

61-74 Chevy C-10 fuel tank sock http://www.carpartsdiscount.com/auto...ml?3593=126010

[Johnny Blaze]

Thanks, everywhere I looked did not show anything.

So, what sould I use to clean the tank with?

[68nate]

Blow air back through the fuel supply line to the tank and go drive it and see if it's better!!! IT'S NOT A SOLUTION, IT'S A SIMPLE TEST TO ELIMINATE THE SOCK IN THE TANK BEING PLUGGED. If it's better, you KNOW that when you go to all the work of cleaning the tank and replacing the sock it will fix your problem. If it does not cure your problem, you KNOW it's not a problem from the tank to the carb and that after you get it figured out you will be cleaning the tank and installing a new sock.

[NOT A TA]

Just be aware that blowing back through the system will dislodge fine particles which have been held back by larger particles on the sock. The fine particles may then find their way through the sock and plug up finer regular fuel filters downstream in your system while using up the gas in the tank and during the next tank or two.

[Jim Nilsen]

Just be aware that blowing back through the system will dislodge fine particles which have been held back by larger particles on the sock. The fine particles may then find their way through the sock and plug up finer regular fuel filters downstream in your system while using up the gas in the tank and during the next tank or two.

I think you are right about that. he will be changing filters for a few times if he does the blowback trick. Maybe changing the fuel line would be a good choice to do now too!

[Johnny Blaze]

Thanks guys.

Did the blow back trick. Took it for a drive.

Did my 9 mile stretch of interstate at 60+mph with the last mile getting over 70mph!

Needless to say this was a huge improvement over the last few drives.

It never acted up.

Looked at the fuel filter afterwords, as I was thinking the same. Looked fine. I have a clear filter so I will keep an eye on it.

There is a local radiator shop that used to clean tanks, going to check to see if tey still do.

Thanks for the help guys!

[paul67]

Glad you got it fixed had that a few time's and it a real pian.

[NOT A TA]

Good to hear you've identified the cause of the problem. If you intend on keeping the truck for a long time I'd just replace the tank if new ones are available. There are also sealers you can pour in and slosh around if the tank is still in good condition.

My guess is that if rust had plugged the filter, you probably need a new tank to be safe. It may not be leaking yet, but the metal on the bottom (where the water from condensation sits) is much thinner now and an accident (or maybe even hitting a good bump) could cause the tank to rupture.

[Johnny Blaze]

This is an in cab tank btw.

Looking into replacing it with one under the bed but not liking the fuel filler options, and a lot of guys are having problems filling them becuase of the angle, and these newer gas pumps shut off.

Will probably get a new in cab tank.

[68nate]

Glad to hear you got it figured out! A good weekend project would be to open it up and take a look inside. It may not be rusty at all and is just from 40 years of filtering fuel. If it looks clean inside, throw a new sock on and replace the fuel filter and drive it.

[Jim Nilsen]

It's just a thought but you might be able to put a siphon line in that could skim the bottom and suck out some of the old debris or at least see if there is any that comes out. You could also try and get a borescope to look in the tank and see for real what condition it is in on the inside. Nothing like getting the full view of it all. You will possibly even see the condition of the sock?