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07-31-2016, 07:11 AM
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#1 |
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Registered User
Join Date: Jun 2016
Location: Oak Bluffs Massachusetts
Posts: 38
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vapor lock
I purchased a 55 stepside 3100 w a 350 in it in april of this year ....it has been running great ...I use it everyday as its a daily driver ....however there have been times when it will run great I park it and then it is real hard to keep running ..I am being told what I am experiencing is vapor lock ...I took it to my mechanic and he said he re routed a fuel line away from the block ....but that did not help .....does anyone have a ideas,information etc on how to eliminate vapor lock for good....I am not sure it matters , but I have a fuel cell and not a gas tank
thanx |
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07-31-2016, 08:07 AM
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#2 |
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Senior Member
 
Join Date: Jan 2009
Location: Raleigh, NC
Posts: 444
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Re: vapor lock
Sounds like a carb insulator may be the next step for you if it doesn't have one already. Here's an article- http://www.edelblog.com/tech-tips/resolving-heat-soak
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1949/1954 with LS swap-yeah! http://s260.photobucket.com/albums/i...0/AD%20trucks/jumbled mess of unorganized photos |
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07-31-2016, 11:53 AM
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#3 |
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Registered User
Join Date: Dec 2011
Location: Moxee WA
Posts: 1,482
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Re: vapor lock
also might be a good idea to install an electric fuel pump if you don't have one already.
it will keep constant fuel pressure in the line which the mechanical one wont do. |
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07-31-2016, 12:54 PM
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#4 |
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Registered User
Join Date: Jun 2006
Location: Idaho
Posts: 8,800
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Re: vapor lock
Ethanol fuel does not help either. When it first came our in the early 80's we had a carbed Honda Accord. If we accidentally put ethanol fuel in it and parked it after running a lot at temps over 95 it would vapor lock on us. Took a couple of times to figure out the connection. Modern engines with electric fuel pumps are designed for it. You might look at insulting your fuel line too. Around here there are a couple of stations that still have "real" gas, that is where I get the fuel for the truck and Chevelle.
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1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project |
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08-01-2016, 01:01 AM
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#5 |
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Registered User
Join Date: Jul 2007
Location: Toppenish, WA
Posts: 15,705
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Re: vapor lock
That's one I didn't think of Orrie. I've been having problems with my little beater daily 92 Geo Prism GSI since it got hot.
Guyz55 I think I have done everything that the old farts ever suggested with my 48 when I had vapor lock problems including close pins on the fuel lines from the pump to the carb, aluminum foil wrapping the fuel lines and a couple I'd just as well not mention. The Carb insulator that Chev3600 suggested is the first thing I'd do though.
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Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around. |
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08-01-2016, 03:56 AM
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#6 |
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A320 Pilot/USAF Retired
Join Date: Mar 2009
Location: Charleston, SC
Posts: 2,629
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Re: vapor lock
A 1in carb spacer/insulator fixed mine.
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JJ My 1957 build: http://67-72chevytrucks.com/vboard/s...d.php?t=334552 http://www.trifive.com/forums/showthread.php?t=22037 Instagram - Chuckdriver57 |
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