The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1967 - 1972 Chevrolet & GMC Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 09-11-2015, 01:20 PM   #1
C21EddieV
Registered User
 
Join Date: Apr 2015
Location: Rancho Cucamonga,CA
Posts: 5
Vapor Lock

I have a 69 Chevy C10. I live in So.Cal and it's been hot & humid! Twice this week I've had a vapor lock! Once in the fast lane on the fwy! What's the best way to correct this issue? I'd appreciate any advice.
__________________
Ed Vasquez
Exclusive Properties
951-712-0601 Cell
909-992-3692 Efax
Email: c21eddiev@gmail.com
C21EddieV is offline   Reply With Quote
Old 09-11-2015, 03:43 PM   #2
cdowns
Senior Member
 
cdowns's Avatar
 
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
Re: Vapor Lock

vapor lock is mostly an old wives myth it doesn't really exist// check your fuel system start at the gas cap and slowly work your way methodically to the carb
__________________
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
cdowns is offline   Reply With Quote
Old 09-11-2015, 04:07 PM   #3
Orence1
Registered User
 
Orence1's Avatar
 
Join Date: Jan 2000
Location: Bothell, WA
Posts: 548
Re: Vapor Lock

Take a look at the location of your fuel filter/fuel line. I had a similar issue in that mine would start fine when cold but when hot it was hard starting during summer heat. No issues in cooler spring or fall. Fuel filter was down about mid block and was picking up a lot of heat. Moved it up the line to the top of the engine and near the carburetor. End of problem.
Orence1 is offline   Reply With Quote
Old 09-11-2015, 04:09 PM   #4
Mmorgan32
Registered User
 
Mmorgan32's Avatar
 
Join Date: Jul 2013
Location: Fresno, ca
Posts: 303
Re: Vapor Lock

Same thing happened to me when I moved to Fresno. I put on an edelbroke 1/2 in thick heat riser. I just ordered it from summit and I shortened my fuel hose going to my carb cause it was touching my valve cover. Never happened again.
__________________
1972 gmc c15 short bed... Sold
1970 chevy custom camper patina daily driver
Mmorgan32 is offline   Reply With Quote
Old 09-11-2015, 08:21 PM   #5
C21EddieV
Registered User
 
Join Date: Apr 2015
Location: Rancho Cucamonga,CA
Posts: 5
Re: Vapor Lock

Thank you all! Much appreciated!
__________________
Ed Vasquez
Exclusive Properties
951-712-0601 Cell
909-992-3692 Efax
Email: c21eddiev@gmail.com
C21EddieV is offline   Reply With Quote
Old 09-11-2015, 08:25 PM   #6
Tillik
Registered User
 
Tillik's Avatar
 
Join Date: Sep 2012
Location: Layton, Utah
Posts: 186
Re: Vapor Lock

I bent a new Fuel line from my mech pump. Wrapped it in Heat Tape. That helped a ton but the Phenolic? Spacer pretty much eliminated my issues with that. Good Luck
__________________
James B.
1967 Chevy Fleetside Shortbed 4X2 (Black & Beautiful)
1971 Chevy Fleetside Shortbed 4X4 (White & Rough)
Tillik is offline   Reply With Quote
Old 09-17-2015, 02:11 PM   #7
MagmaJct
Registered User
 
MagmaJct's Avatar
 
Join Date: May 2008
Location: Mesa, AZ
Posts: 281
Re: Vapor Lock

I had that reoccurring issue. It progressively got worse until the truck refused to start, and had to be towed home.

From there I diagnosed the problem to a failed fuel pump. Once I replaced it, I've never had vapor lock symptoms again. And I live in the Arizona desert, and that was probably 4 - 5 years ago!

Apparently, a pump can show these symptoms as a precursor to complete failure. I don't know if I'd performed a pressure test if I would've seen any problems.

Regards,
Mike
__________________
I own 3 classic vehicles. 1971 LWB C10 Deluxe. 1974 VW Super Beetle. 1971 VW Fastback.

The C10 and the Super Beetle run, the Fastback is just not there yet!

Please visit my Super Beetle and Fastback profile on TheSamba.
MagmaJct is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 01:48 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com