ClassicOldsmobile.com  

Go Back   ClassicOldsmobile.com > Vehicle Lineup > Vintage Oldsmobiles
Sign in using an external account
Register Forgot Password?
Search
Vintage Oldsmobiles Curved Dash, Limited Touring, Models 40, 53, 66; Series 60, 70, 90

Welcome to Classic Oldsmobile Forum!
Welcome to Classic Oldsmobile forum,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Classic Oldsmobile Forum today!


Reply
 
 
 
submit to reddit
 
LinkBack Thread Tools Search this Thread Display Modes
Old July 29th, 2012, 12:03 AM   #1 (permalink)
Registered User
 
55/98's Avatar
 
Join Date: Jul 2010
Posts: 77
vapor lock ?

I would like some feed back on vapor lock of gas. can it be at the tank or just at carb and lines to carb ? This is definetly heat related, when it is in the upper 80s and 90s. First time was after a long highway trip and a couple long trafic lights it just died and wouldnt restart. I thought I ran out of gas, put gas in tank still would not start so I poured some gas in carb and it fired right up and kept running.
The next time was coming home from work, combination hiway city city being last leg , same thing happened but this time I was rolling down my street and coasted to the driveway. car did same thing as first time had to pour gas in carb to get it running again.
And that brings to today, Iwas on my way to a car show 20 miles out of town and it started again only this time was at highway speed and I was able to keep it running. Acted like it was starving for fuel so I turned around and once back in town was alright. I drove it this evening with no issues as it was cooler outside. Boy this turned out to be a long winded thing didnt it. This may help its a 55 olds 324 4bbl carb is a edelbrock.
Thank you in advance for any help you all can offer up.
55/98 is offline   Reply With Quote
Old July 29th, 2012, 04:06 AM   #2 (permalink)
Connoisseur d'Junque
 
MDchanic's Avatar
 
Join Date: Sep 2010
Location: Maine
Posts: 13,929
Sounds like vapor lock.

I can't speak from experience with your exact model, but I know that in similar cars we have had success putting an electric fuel pump in back, right by the tank, to push cool fuel through the lines, past the "vapor" point. It doesn't have to run all the time - you can use a momentary or toggle switch and just turn it on when there's a problem (or to fill the carb when it's been sitting a while).

- Eric
MDchanic is offline   Reply With Quote
Old July 29th, 2012, 05:44 AM   #3 (permalink)
Moderator
 
oldcutlass's Avatar
 
Join Date: Oct 2009
Location: Granbury, Texas
Posts: 13,708
Check your fuel line routing, make sure there is about 2.5 inches of space between it and any hot engine parts. Sometimes you can wrap insulation around it to reflect some of that heat. Also replace the fuel filter/s as anything that slows the fuel flow seems to aggravate the scenario.
__________________
- (other) Eric





There is nothing that can't be solved with a suitable amount of explosives!

1967 Oldsmobile Cutlass 468/ Turbo 400
1963 Plymouth Fury (Sold)
2006 Mustang GT (Momma's)
2006 Mustang Coupe(son'S)

http://s1141.photobucket.com/albums/n587/oldcutlass/

http://s1141.photobucket.com/albums/...lass/plymouth/
oldcutlass is offline   Reply With Quote
Old July 29th, 2012, 07:24 AM   #4 (permalink)
Registered User
 
Join Date: Sep 2010
Location: Shorewood, Il.
Posts: 3,057
They make a 3/8 insulating spacer for q-jets and holleys - gets the carb away from the manifold heat passage, and makes a world of difference!
See if you can find one for an e-brock, or stack some thick gaskets.
Rickman48 is offline   Reply With Quote
Old July 29th, 2012, 11:06 AM   #5 (permalink)
Registered User
 
55/98's Avatar
 
Join Date: Jul 2010
Posts: 77
Thanks for the responses guys I will see what I can find . I was thinking about an electric fuel pump as the mechanical one looks to be leaking a little. Again thank you.
55/98 is offline   Reply With Quote
Old July 29th, 2012, 11:11 AM   #6 (permalink)
Kickin' It Oldschool
 
bdub217's Avatar
 
Join Date: Jul 2012
Location: Champaign-Urbana, Illinois
Posts: 422
I would update it with an electric fuel pump, if indeed you can afford it.
__________________

Don't sweat the petty stuff and don't pet the sweaty stuff

_________
Check out my Drum Brake Tutorial
My Photo Album
'85 Delta 88
bdub217 is offline   Reply With Quote
Old July 29th, 2012, 01:39 PM   #7 (permalink)
Registered User
 
Join Date: Jan 2011
Posts: 93
We had problems like that and it turned out to be the fuel pump!! The pump would function for a while, but once it got too hot, the fuel pump would run slower and the fuel pumped into the carb would not be sufficient.
I changed the fuel pump on my 56 as I am absolutely against an electric fuel pump. These cars functioned more than 50 years with a mechanic fuel pump and now, all of a sudden, we need an electric one?
NO WAY!

By the way, are you sure that your gas tank is clean and does not contain any rust flakes that could clogg up the fuel lines?
The_German is offline   Reply With Quote
Old July 29th, 2012, 02:20 PM   #8 (permalink)
Kickin' It Oldschool
 
bdub217's Avatar
 
Join Date: Jul 2012
Location: Champaign-Urbana, Illinois
Posts: 422
I'm not against replacing your fuel pump with the original style, just don't know how available they are, that's why I was saying go with an electric. Try cleaning out the system with some Seafoam in the gas tank and main brake booster line.
__________________

Don't sweat the petty stuff and don't pet the sweaty stuff

_________
Check out my Drum Brake Tutorial
My Photo Album
'85 Delta 88
bdub217 is offline   Reply With Quote
Old July 29th, 2012, 07:09 PM   #9 (permalink)
Registered User
 
Tedd Thompson's Avatar
 
Join Date: Oct 2004
Location: Forest Ranch Ca.
Posts: 2,287
Fusick's has a rebuild service for fuel pumps, looks to be about $115.00 from my catalog. You might give them a call for current pricing. They also come up on Flee- bay from time to time, but keep in mind that anything very old will not be set up for modern gas. ...Tedd
__________________
Tedd Thompson is offline   Reply With Quote
Old August 2nd, 2012, 12:27 AM   #10 (permalink)
Registered User
 
55/98's Avatar
 
Join Date: Jul 2010
Posts: 77
I installed another carb on the olds today. drove it around in 92 degree heat in town and had no problems. I'll see how it goes.
55/98 is offline   Reply With Quote
Old August 2nd, 2012, 10:50 AM   #11 (permalink)
Kickin' It Oldschool
 
bdub217's Avatar
 
Join Date: Jul 2012
Location: Champaign-Urbana, Illinois
Posts: 422
hoping for the best!!!!!!
__________________

Don't sweat the petty stuff and don't pet the sweaty stuff

_________
Check out my Drum Brake Tutorial
My Photo Album
'85 Delta 88
bdub217 is offline   Reply With Quote
Old August 13th, 2012, 11:37 AM   #12 (permalink)
Railroad Mike
 
Join Date: Sep 2011
Location: 1248 Riverwood Drive. Nashville, Tn. 37216
Posts: 115
Vapor lock is caused when the fuel is vaporized before it can enter the manifold. Usually is caused by a fuel line too close to a heat source(exhaust header, head, etc,,). Can be a carb problem, especially if the manifold has a crossover heat passage for an auto. choke. If the carb fixes the problem, great!!
55miketn is offline   Reply With Quote
Old August 13th, 2012, 02:40 PM   #13 (permalink)
Registered User
 
mrolds69's Avatar
 
Join Date: Jul 2010
Posts: 318
It's true that mechanical pumps have worked thru the 50's, 60's, etc. My understanding is the new gas formula evaporates faster. It's possible that's contributing to the prob. I had a stock 74 GTO years ago with the same prob as you. I tried everything, new pump, moving lines, insulating...the only thing that fixed it was an electric pump. I can't explain why! My 69 442 is all stock and I've never had a prob.
__________________
1969 Oldsmobile 442 Senior Preservation
1967 Buick GS 400 Senior Preservation
1970 Buick GS 455 Triple Black Convertible

1999 Mustang Convertible
and many more!
mrolds69 is offline   Reply With Quote
Old August 13th, 2012, 08:34 PM   #14 (permalink)
Registered User
 
55/98's Avatar
 
Join Date: Jul 2010
Posts: 77
So far the carb has solved the problem. I have driven the car several times in the heat of the day, had a long wait getting into local drag strip couple weekends ago, temp gauge got up pretty hot with no problems. Thanks for all the replies.
55/98 is offline   Reply With Quote
Old August 13th, 2012, 08:34 PM
ClassicOldsmobile
1957 Oldsmobile




Paid Advertisement
 
 
 
submit to reddit
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Where is the charcoal vapor canister on my 69 Cutlass? rhett838 General Discussion 30 May 29th, 2011 06:25 PM
Servicing vapor canister? ChefDeadpool Cutlass 5 December 12th, 2010 05:43 PM
Vapor Lock? Fuel Return Line vmathy Big Blocks 4 May 31st, 2010 04:32 PM
vapor lock? bigfun64mo Cutlass 4 August 25th, 2009 05:24 PM
vapor/fuel separator rgreathouse 442 6 September 30th, 2006 11:27 AM


All times are GMT -7. The time now is 09:16 AM.


Advertising - Privacy Statement - Terms of Service - Jobs
All content Copyright 2008 by Internet Brands, Inc.

Search Engine Friendly URLs by vBSEO 3.5.2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62