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Joined: Oct 2003
Posts: 102
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Oct 2003
Posts: 102 |
Hello again.
My 31 engine has 140 miles since the rebuild.
If I drive a few miles and park for 5 minutes, then start it again the motor stumbles and wants to quit. If I pump the gas and get the r.p.m.s up it seems to settle down and after a little while and I can drop the r.p.m.s without it stalling.
It never has this problem cold. It is not excessivly hot outside, maybe 85 degrees F. at most. We do have ethonal in our gas up here. I have a 2 blade fan. My temp gage doesn't work.
Any ideas?
Thank you.
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
First suggestion......get your temp. gauge fixed. Our 1984 Oldsmobile has the exact same problem that you describe because we have Ethanol as well. In cooler weather the car doesn't have this issue, but above 80 degrees the car stumbles and dies upon a hot restart. After a high RPM for a while, when the cool gas in the tank gets to the carburetor, the car settles down and idles perfectly. In the winter time this issue doesn't exist. My second suggestion would be to get some non-Ethanol gas if it is available anywhere and then try it. The non-Ethanol gas will probably cure your problem. By the way, all of my cars hate the Ethanol gasoline. Good luck!   
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Oct 2003
Posts: 102
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Oct 2003
Posts: 102 |
Thanks for the help J.Y.D.
I'll try it.
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Jan 2010
Posts: 648
Oil Can Mechanic
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Oil Can Mechanic
Joined: Jan 2010
Posts: 648 |
I dont know why they dont take that crap out of the gas. The stuff is destructive and useless. If i wanted that, i'd run water and gas in the tank.
In my shop, quality is a standard, NOT and option.
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Joined: Nov 2001
Posts: 29,863
Tech Advisor ChatMaster - 25,000
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Tech Advisor ChatMaster - 25,000
Joined: Nov 2001
Posts: 29,863 |
The Mangy Old Mutt
"If It's Not Junk.....It's Not Treasure!"
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Joined: Jan 2002
Posts: 980
ChatMaster - 750
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ChatMaster - 750
Joined: Jan 2002
Posts: 980 |
1931 Chevrolet Cabriolet
1931 Chevrolet Special Sedan
1962 Alfa Romeo Spider
1972 Alfa Romeo Berlina
2000 GMC 2500
Ethanol has never given me any problems with any of these vehicles.
If you have old Chevrolets, other old Chevrolets will find out where you live.
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Joined: Aug 2006
Posts: 1,774 Likes: 4
ChatMaster - 1,500
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ChatMaster - 1,500
Joined: Aug 2006
Posts: 1,774 Likes: 4 |
Alcohol boils at a lower temperature than gasoline so ethanol is more likely to cause vapor lock problems. That being said, I like ethanol for most of my vehicles but not all of them. 
Ed
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Joined: Jan 2002
Posts: 1,866
ChatMaster - 1,500
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ChatMaster - 1,500
Joined: Jan 2002
Posts: 1,866 |
It will be interesting to see if that helps johnmc as I don't have any problems with the ethanol in my vehicals or small engines here in Minnesota but how am I too know if they wouldn't last longer with straight gas. 
I think I'm a fairly wise person because I'm smart enough to realise I'm not too bright.
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Joined: Apr 2009
Posts: 1,966
ChatMaster - 1,500
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ChatMaster - 1,500
Joined: Apr 2009
Posts: 1,966 |
As JYD says, above 80F is part of the problem; in Minnesota do you ever get above 60F? LOL! I know in Nova Scotia I'm real happy any day it gets to 80F, like about 5 days a year.
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Joined: Jul 2010
Posts: 207
Backyard Mechanic
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Backyard Mechanic
Joined: Jul 2010
Posts: 207 |
If in doubt about ethanol you can pay $4/qt at home depot or less if you buy at small engine repair shops in bulk for ethanol free gas or pre-mix which is a must for storing 2stroke equipment or old cars depending on your method for storage
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Joined: Aug 2010
Posts: 283
Backyard Mechanic
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Backyard Mechanic
Joined: Aug 2010
Posts: 283 |
You can find ethanol free gas around the lakes, most all new out board engines are recomending ethanol free gas.What a pain.
Wake up to learn something new everyday.
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Joined: Jan 2008
Posts: 510
Oil Can Mechanic
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Oil Can Mechanic
Joined: Jan 2008
Posts: 510 |
Totaly unrelated to chevys but several of my boating friends have found excess water in there tanks after winter storage. Boats run in water but not really good on water ...
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