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Why do I hear a ticking noise when accelerating but not hearing it while staying at sertin speed in a 1991 Chevy Suburban 1500?
Wiki User
∙ 16y ago
What you are hearing is called "Pinging" or pre-detonation. This is not good and may eventually cause engine damage. It is caused by burning too low an octane fuel, Carbon deposits in the combustion chamber, or possible an engine out of time. Have the timing checked if you are burning the proper octane fuel. Also purchase a can of Seafoam cleaner and pour one can in a full tank of fuel. See if the pnging disappears. If none of this stops the pinging, then check your engine for an intake manifold leak or vacuum hose leak. Also purchase another can of Seafoam and inject it into the intake to remove carbon deposits. Follow the directions on the can very carefully when doing this. You will see lots of smoke, so don't be alarmed, and be careful not to stall the engine by adding too much Seafoam. If none of this helps, seek out professional help, and in the mean time move up to a higher octane fuel to stop the pinging until you can get it corrected.
Wiki User
∙ 16y ago
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