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  '64 1/2 to '73 -- The Classic Mustang
  Vapor lock

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Author Topic:   Vapor lock
indyphil
Gearhead

Posts: 2354
From: Senoia, G.A. USA
Registered: Jul 2002

posted 07-26-2002 07:56 AM     Click Here to See the Profile for indyphil   Click Here to Email indyphil     Edit/Delete Message   Reply w/Quote
I know this is a dummy subject but I promise I have searched the archives before asking this.
My '68 289 2V suffers from vapor lock after long runs. I drove it 60 miles yesterday at a steady 70mph, and after switching off for just a few minutes i needed to pour gas into the carb to get her going. My friend gave me his can of EZstart, but I obviously want a permanent solution. Where do i start? fuel pump? lines? filter? Is this something that a lot of you guys suffer from?
I wondered if maybe its a common fault and easily fixed in one place... (I can hope can't I?)

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Scott (69Mach)
Gearhead

Posts: 727
From: Walnut Creek, CA USA
Registered: Jun 99

posted 07-26-2002 11:44 AM     Click Here to See the Profile for Scott (69Mach)   Click Here to Email Scott (69Mach)     Edit/Delete Message   Reply w/Quote
Every time I've had a problem it's been from the fuel lines getting heated up. Check your routing and keep it away from exhaust manifolds, etc. Do you have a phenolic spacer beneath your carb??? That will also help keep things cool and working right.

Good luck,

Scott

[This message has been edited by Scott (69Mach) (edited 07-26-2002).]

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Pierre
Gearhead

Posts: 541
From: Near Paris, France
Registered: Apr 2002

posted 07-30-2002 04:25 AM     Click Here to See the Profile for Pierre   Click Here to Email Pierre     Edit/Delete Message   Reply w/Quote
Yup ! Had the same problem, installed a 1" heat spacer and no more vapor lock. I can now touch the carb with my hands even after long runs in the 100? heat.

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indyphil
Gearhead

Posts: 2354
From: Senoia, G.A. USA
Registered: Jul 2002

posted 07-30-2002 08:07 AM     Click Here to See the Profile for indyphil   Click Here to Email indyphil     Edit/Delete Message   Reply w/Quote
Pretty much have gotten this fixed.
I figured she was running a little too warm, so I changed the thermostat. The old one it turned out was junk and now she runs cooler and hasnt vapor locked yet. I also changed the fuel filter anyway just for peace of mind. It looked like the fuel pump was newish so maybe the previous owner already tried to fix the vapor lock problem without success.

The carb spacer is a great idea to make things even better, but I have a 2 barrel and Im not sure how easy it would be to find a spacer for it.
Thanks for the advice, anyone that wants to sell a 2 barrel insulating carb spacer, Im your man!

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