[Tigers] Unusual Vapor Lock

[stubrennan at comcast.net]

Thanks Erich and John.  That's the type of info I was look ing for.  

Stu

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-----Original Message-----
From: awtiger at cox.net
To: Tigers at autox.team.nete.coiner@cox.netstubrennan at comcast.net
Cc: 
Sent: 2013-05-17 15:08:28 GMT
Subject: Re: [Tigers] Unusual Vapor Lock

Erich, et al:

This happened to me on my Tiger a few years back.  It was very confounding and caused me to expend considerable amounts of time trying to figure it out.  In the end, however, the problem came down to a combination of having leftover winter-blend gas in the Tiger and me trying to drive it on a pretty warm late spring day and into the summer months.  It spit, sputtered, died, left me on the side of the road until it cooled off, etc...all of this happened several times, while I was trying all of these different remedies being mentioned here to fix it.  As it turned out, however, the problem went away when I drained the tank and refilled it with with fresh summer-blend fuel.  

The lesson that I took away from my situation was to always remember that the fuel that is refined nowadays is formulated for cars that run high-pressure fuel injection systems.  Boiling fuel in a modern fuel injected car is unheard of anymore, but it seems to happen with alarming regularity now with carburetted cars of old where the fuel systems are under very little pressure.  As time goes on, I think modern fuel formulas will play an increasingly significant role in the drivability of carburetted cars.  Just my .02 worth...

Andy Walker
Edmond, OK 
B382001600LRXFE
TAC #740

---- e.coiner at cox.net wrote: 
> Vapor lock is possible.
> 
> Refineries change the blend of molecules in the gas depending on the season.
> Winter blend vaporizes more easily. Summer blend less so.
> Your November gas would be more susceptible to vapor lock than Summer blend.
> Erich