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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Nov 2017 Posts: 8 'Bolter | | 'Bolter Joined: Nov 2017 Posts: 8 | Recently got the truck running again. Seems to be running fairly good. i noticed that it is running rich. any list of reasons that could be making it run rich? secondly, when you change from 6volt to 12 volt, do the spark plugs need to be changes due to higher voltage?
thanks for your time as always!!
Oldtruckspapa
Blessings,
Oldtruckspapa
| | | | | Joined: Feb 2004 Posts: 29,749 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,749 | If you're running a Rochester "carburetor" there's a bunch of reasons it could be running rich- - - -mostly because they were never intended to last anywhere near the 70-something years they have been around. When GM started making their own Chevy carburetors in the early 1950s instead of buying Carter, They used the "baby chicken" business model- - - -"CHEEP- - - -CHEEP- - - -CHEEP! The top housing of a Rochester B with only four screws holding it on has a bad habit of warping- - - -creating a vacuum leak that causes the power valve to go full rich and stay that way. There's a way of straightening the housing by heating it in an oven that's a temporary fix. The right fix is to install a Carter or Zenith carb!
You might want to open up the plug gap a little- - - -maybe .040 instead of the original .035 to take advantage of the higher available voltage.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Apr 2005 Posts: 2,097 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,097 | Chevy converted to 12 volts in 55, there should be no reason that your 59 is 6 volts.
Fred
1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine
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