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engine knock

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Old September 25th, 2006, 10:17 PM
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Default engine knock
I have a 2003 Silverado with the 6 cylinder. When driving at 20 to 40 mph, the engine idles at around 1000 to 1200 rpm. When I accelerate, there is a hesitation and engine knock. Any suggestions?
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Old September 25th, 2006, 10:59 PM
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Default RE: engine knock
When you have a knock in these 4.3L engines that means that you have a lean fuel condition, usually caused by clogged fuel injectors or a restricted fuel filter.
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Old October 23rd, 2006, 10:48 AM
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Default RE: engine knock
Run higher octane fuel and run a couple tanks through it with a good carb/injector cleaner. That should clear it up.
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Old October 24th, 2006, 8:16 AM
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Default RE: engine knock
Usually, the computer will adjust the timing to eliminate the knock, so You may need a knock sensor.
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