Question about 1983 GMC C2500

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C2500 250 engine won't start during cold weather

I have a 1983 C2500 and have problems getting it started during the winter months. If I start the engine and stay on the gas until the engine is completely warm it will not start the next time I try. If I start the engine and let it lope to warm and the engine stalls it will not start until spring time. I have rebuilt the carb, checked the cap and rotor and everything is as it should be. (no excessinve wear on distributor). The engine turns over but will not start. I have checked the plugs to ensure that I was getting spark. #6, and #8 cylinder have an excessinve amount of fuel coming from them. (That is why the carb was rebuilt). Any suggestinos as to what the problem may be?

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What it does is due to cold temperature your fuel lines makes moisture and tend to froze that could cause hard start you might check your fuel lines for corrosion and deterioration also check your battery voltage too.

Posted on Jan 05, 2009

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I had the same problem on my truck. go to a autopart store and they will give what is called a block warmer it's basicly a peice that you install on the block of your engine and then at night plug it in to the 110 socket of you garage or out door plug, starts right up in the cold morning just don't forget to un plug it i did lol....... hope this could help you.

Posted on Jan 05, 2009

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This is much less of a problem on fuel injected engines because the fuel is usually under much higher pressure inside the injectors and fuel line. Even so, a fuel line routed near an exhaust manifold or a fuel rail that's exposed to a lot of heat may still suffer the same kind of problems.
Heat soak problems such as these can sometimes be cured by wrapping insulation around affected fuel lines, and/or installing an insulating spacer or heat shield under the carburetor.
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Hard hard starting tends to be a seasonal problem, but may be worse in the early months of spring when refiners are switching fuel blends. Gasoline refiners produce fuel with a slightly lower volatility rating (called "Reed vapor pressure") during hot summer months because lower volatility fuel is less likely to boil and cause hot starting problems. During the winter, they switch to a higher volatility fuel because it makes cold starting easier. But if you still have "winter" grade fuel in your tank when warm spring weather arrives, you may experience some hot starting problems. The problem will go away, however, as soon as the refiners in your area switch to their summer grade fuel

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My 94 Blazer (125,000 miles) has run great since I bought it 5 years ago but recently developed a problem. When I drive it on warm/hot days, it starts right up when cold but after driving even for a short...


Hot starting problems are usually fuel related. When a hot engine is shut off, the temperature of the engine and everything on it continues to rise for awhile as the engine undergoes a period of "heat soak." This can cause fuel to boil inside the carburetor bowl, fuel lines and fuel filter. When you attempt to restart the engine, "vapor lock" obstructs the flow of fuel and the engine doesn't want to start.

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Heat soak problems such as these can sometimes be cured by wrapping insulation around affected fuel lines, and/or installing an insulating spacer or heat shield under the carburetor.
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