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Glow plugs are installed in diesel engines for one purpose only: to aid in cold starts. They only should be used when the engine has not been run for some time, which varies depending on the outside temperature. The glow plugs are not needed when the engine is at operating temperature.

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โˆ™ 2006-09-01 06:24:36
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Q: 1992 Chevy silverado 6.5L turbo diesel when it is cold the glow plugs work fine when the engine is at running temperature they wont come on whats wrong?
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