Dennis
Fuel problem
Thread Starter
Racer
Joined: Jan 2008
Posts: 455
Likes: 0
From: MD
Fuel problem
Recently got a low mile 66 small block 300hp and it has developed a fuel delivery problem. To date: replaced rubber hoses front and rear on fuel lines. RR stone fuel filter. Set & reset fuel level on Holley carb. Checked fuel pressure runs @6psi. Scoped tank and sending unit. Clear and clean
Car starts and runs fine. After 15 miles or so it just runs out of fuel and sputters to a stop. Acts like a vapor lock. Fuel line from the pump to carb is bone dry. Prime the carb with a little gas and she starts and runs fine. Usually no further problems. Other than replacing a perfectly good fuel pump what other solutions might you have in mind. Sitting on the side of the road in a classic vette really sucks.
HELP
Car starts and runs fine. After 15 miles or so it just runs out of fuel and sputters to a stop. Acts like a vapor lock. Fuel line from the pump to carb is bone dry. Prime the carb with a little gas and she starts and runs fine. Usually no further problems. Other than replacing a perfectly good fuel pump what other solutions might you have in mind. Sitting on the side of the road in a classic vette really sucks.
HELP
Team Owner
Joined: Aug 2008
Posts: 33,078
Likes: 6,655
From: Rochester NY
St. Jude Donor '09 thru '26
POSSE ZR-1 Driver
Joined: Feb 2002
Posts: 3,980
Likes: 139
From: Groton CT
Look at the fuel pump. There is a pivot pin that the pump lever rides on. Make sure the pin is not backing out or missing.
I've lost two of those pins over the last 10 years and the car acted like your's.
I've lost two of those pins over the last 10 years and the car acted like your's.
POSSE ZR-1 Driver
Joined: Feb 2002
Posts: 3,980
Likes: 139
From: Groton CT
On some replacement fuel pumps, the pin is press fit in place and it eventually works loose. If you don't have AC, you should be able to see the pin from above.
Pics of original style pin peened over with retainer.
Pics of original style pin peened over with retainer.
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Joined: Aug 2007
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Likes: 7,147
Army
If you are convinced the sock on the sending unit is not clogging things up or some such then I'd be real tempted to swap out the fuel pump. Somebody on here had one of those little "poppit" valves fall out of the pump because it wasn't staked in and it caused some strange symptoms...
