Vapor Lock problem - The 1947 - Present Chevrolet & GMC Truck Message Board Network

motocrosschump · 08-26-2005, 11:46 AM

My 69 starting getting "vapor lock" since I put new exhaust on it. The Exhaust pipe runs about 6-8 inches from the metal fuel line. Will Cloths Pins really work? Some old guy told me to try that. I guess it absorbs heats?

cdowns · 08-26-2005, 12:38 PM

clothes pins work good for hanging wet laundry out on the clothes line//6-8inches should be more than enough clearance look more at the line from the pump to the carb ,it shouldn't be touching the engine block or laying on the intake manifold//first check that your fuel filter isn't dirty second while the gas line is disconnected from the carb turn the engine over with the dizzy disconnected and the fuel line dumping into a jar should pump about a pint in 15seconds if not your pump maybe going bad or the fuel strainer in the gas tank maybe clogged // if you suspect vapor lock after these checks a crumpled up piece of aluminum foil around the line will serve as a temp heat shield to verify the problem

motocrosschump · 08-26-2005, 01:43 PM

What makes me think its Vapor Lock is, when I remove the line off the carb it lets out alot of air. The Line going to carb also is pretty hot.

tomatocity · 08-26-2005, 02:08 PM

What about using heat resistant spark plug wire Sleeving or Boot Protector?

08-26-2005, 11:46 AM	#1
motocrosschump Registered User Join Date: May 2005 Location: Texarkana, AR 71854 Posts: 397	Vapor Lock problem My 69 starting getting "vapor lock" since I put new exhaust on it. The Exhaust pipe runs about 6-8 inches from the metal fuel line. Will Cloths Pins really work? Some old guy told me to try that. I guess it absorbs heats? __________________ 2006 Titan SE Crew Cab Daily Driver 2005 Mazda Tribute (Wifes car) 1969 C10 SWB 350/3 Fleet "Max" 1969 Chevelle 2 door 350/3

08-26-2005, 12:38 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	clothes pins work good for hanging wet laundry out on the clothes line//6-8inches should be more than enough clearance look more at the line from the pump to the carb ,it shouldn't be touching the engine block or laying on the intake manifold//first check that your fuel filter isn't dirty second while the gas line is disconnected from the carb turn the engine over with the dizzy disconnected and the fuel line dumping into a jar should pump about a pint in 15seconds if not your pump maybe going bad or the fuel strainer in the gas tank maybe clogged // if you suspect vapor lock after these checks a crumpled up piece of aluminum foil around the line will serve as a temp heat shield to verify the problem __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

08-26-2005, 01:43 PM	#3
motocrosschump Registered User Join Date: May 2005 Location: Texarkana, AR 71854 Posts: 397	What makes me think its Vapor Lock is, when I remove the line off the carb it lets out alot of air. The Line going to carb also is pretty hot. __________________ 2006 Titan SE Crew Cab Daily Driver 2005 Mazda Tribute (Wifes car) 1969 C10 SWB 350/3 Fleet "Max" 1969 Chevelle 2 door 350/3

08-26-2005, 02:08 PM	#4
tomatocity Registered User Join Date: Jun 2005 Location: Sacramento CA Posts: 1,255	What about using heat resistant spark plug wire Sleeving or Boot Protector? __________________ Got bored, sold everthing. Got bored, looking for a 1960-66 C-10. Want to build my last truck.



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