|
10-09-2008, 01:03:40 AM
|
#1
|
|
New Member
Join Date: Sep 2008
Location: Austin, TX
Posts: 12
|
Holley Fuel Pump Gas Vapors
So I just bought a 1971 camaro and its stinking up my garage and the house. There are gas vapors or gas fumes coming from the Fuel Pump installed behind the gas tank. Its a show car so its using braided hoses. I can't tell if the vapors are coming from the braided hoses or from the fuel pump itself.
In order for the car to run properly you have to turn the fuel pump on 30 seconds before you start it up so the gas gets to the engine. When I am shutting the car off I shut off the fuel pump 30 seconds before I cut the engine to bleed out the lines, but this doesn't help reduce the fuel vapors?
Is this a bad fuel pump, pump not sealed properly or are the braided hoses leaking the fumes?
Oh, and no there is no gas leak as I have run a rag over everything and it comes back clean.
|
|
|
|
10-09-2008, 01:28:03 AM
|
#2
|
|
Lifetime Gold Member
Join Date: Jul 2001
Location: san bernardino calif
Posts: 16,460
|
Quote:
|
Originally Posted by jgervin
So I just bought a 1971 camaro and its stinking up my garage and the house. There are gas vapors or gas fumes coming from the Fuel Pump installed behind the gas tank. Its a show car so its using braided hoses. I can't tell if the vapors are coming from the braided hoses or from the fuel pump itself.
In order for the car to run properly you have to turn the fuel pump on 30 seconds before you start it up so the gas gets to the engine. When I am shutting the car off I shut off the fuel pump 30 seconds before I cut the engine to bleed out the lines, but this doesn't help reduce the fuel vapors?
Is this a bad fuel pump, pump not sealed properly or are the braided hoses leaking the fumes?
Oh, and no there is no gas leak as I have run a rag over everything and it comes back clean.
|
over a period of time the rubber lined braided hoses will weep fuel vapors such as you're experiencing this is due to age of the fuel lines . so just like normal rubber hoses they have to be replaced from time to time . some members here on this site have had good luck with the teflon lined braided hoses and after replacing the old hose with this teflon lined hose the fuel vapors stop
__________________
baldwin motion phase III Z/30 clone
1972 chevy camaro ss
1970 LT1 350sbc / 425hp 11.1:1 comp, GM #140 off-road solid lifter cam ,holley strip dominator
2" open spacer and holley 750dp ...........all old school 70's performance parts
old school pic
my old school camaro idle video
|
|
|
|
|
10-09-2008, 01:34:08 AM
|
#3
|
|
SoCal Team Mom for Life / Moderator
Join Date: Nov 2002
Location: AZ
Posts: 11,350
|
Quote:
|
Originally Posted by muscl car
over a period of time the rubber lined braided hoses will weep fuel vapors such as you're experiencing this is due to age of the fuel lines . so just like normal rubber hoses they have to be replaced from time to time . some members here on this site have had good luck with the teflon lined braided hoses and after replacing the old hose with this teflon lined hose the fuel vapors stop
|
Has nothing to do with the age. PM Ultm8z if you need the specifics since he is the guy that figured it out, but the braided steel rubber lines Don't hold the fuel vapor, new old or in between. Mike and I both switched to Teflon lines and lost the oder. I noticed faster start up because my fuel lines didn't loose the pressure as fast.
I know there is a post about it, I'll see if I can dig up the link.
Multiple threads (all by Mike)
http://www.nastyz28.com/forum/search...archid=1267596
__________________
"Nothing comes from talkers but sound
We can talk all we want to
but the world still goes around and round"
Last edited by Knuckle Dragger : 10-09-2008 at 01:36:13 AM.
|
|
|
|
|
10-09-2008, 02:49:14 AM
|
#4
|
|
Veteran Member
Join Date: Mar 2008
Location: Colebrook, Connecticut
Posts: 107
|
since some states use more ethanol in their gas itll eat up the rubber and itll weep.
luckely in connecticut their isnt much ethanol in our gas.
|
|
|
|
| Messages from Our Sponsors ! |
|
|
|
Awesome NastyZ28.com Merchandise !!
T-shirts, wearing apparel
Drinkware, Mouse Pads, Decals
|
|
|
10-09-2008, 10:27:38 AM
|
#5
|
|
Veteran Member
Join Date: May 2000
Location: Los Angeles
Posts: 7,597
|
jgervin, I just PM'd you back...
Basically what's happenining is exactly what Knuckle said. Some portion of the fuel is able to permeate through the rubber. Mine always smelled like "fuel", but not like if you were to put your nose over a puddle of fuel. It was more like a fuel-ish type of smell which I always thought was curious but could never pinpoint.
I'd go up and down the car trying to isolate the source of the smell with my nose but I never found it until, after several years of this (and having given up on trying to solve it), I got hold of a gas analyzer and by probing up and down the fuel lines, I saw huge spikes in hydrocarbon counts anywhere around the lines. That told me the problem was the fuel lines themselves. Once I switched to the teflon lines, bingo... problem solved.
|
|
|
|
|
10-09-2008, 04:32:26 PM
|
#6
|
|
Lifetime Gold Member
Join Date: Feb 2004
Location: Podunk, CT
Posts: 10,882
|
Quote:
|
Originally Posted by DAWG
since some states use more ethanol in their gas itll eat up the rubber and itll weep.
luckely in connecticut their isnt much ethanol in our gas.
|
yeah, only 10% 
__________________
.
.
If I'm curt with you, it's because time is a factor here. I think fast, I talk fast, and I need you guys to act fast if you want to get out of this. So, pretty please, with sugar on top, clean the f'ing car.
I am the proud parent of a child whose self-esteem is sufficient that she doesn’t need me advertising her minor scholastic achievements on the bumper of my car
|
|
|
|
|
10-09-2008, 05:35:46 PM
|
#7
|
|
Veteran Member
Join Date: Sep 2000
Location: new market NH
Posts: 3,176
|
Quote:
|
Originally Posted by ULTM8Z
jgervin, I just PM'd you back...
Basically what's happenining is exactly what Knuckle said. Some portion of the fuel is able to permeate through the rubber. Mine always smelled like "fuel", but not like if you were to put your nose over a puddle of fuel. It was more like a fuel-ish type of smell which I always thought was curious but could never pinpoint.
I'd go up and down the car trying to isolate the source of the smell with my nose but I never found it until, after several years of this (and having given up on trying to solve it), I got hold of a gas analyzer and by probing up and down the fuel lines, I saw huge spikes in hydrocarbon counts anywhere around the lines. That told me the problem was the fuel lines themselves. Once I switched to the teflon lines, bingo... problem solved.
|
yea mike im alittle short on cash this week so could yea just roll up your teflon line a fedx it to me  , thanks a bunch lol  |
|
|
|
|
10-09-2008, 05:46:24 PM
|
#8
|
|
Lifetime Gold Member
Join Date: Oct 2006
Location: Skating away on the thin ice of a new day...
Posts: 9,216
|
Quote:
|
Originally Posted by theflash
yeah, only 10% |
minimum of 10% in Virginia.. 
__________________
Wayno - And yeah.....after meeting everyone....I can say this is the coolest,
most 'will help you out with burying a body' type of people I have ever had the pleasure
of meeting and hanging out with.
Marks71BB-There is a lot of support on this board. when yer down, we are here for ya,
and if yer up, we are here for ya, but when ya act like an a$$, we are even MORE here for ya.
|
|
|
| Thread Tools |
| Display Modes |
 Linear Mode
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
|
